Audio Alchemy Digital Decoder Engine V1.1 D/A Converter. Good physical condition. Feet disintegrated so I removed but there is gummy residue which can be removed with appropriate solvent. Not tested. Takes a 12v 150mA power supply which I do not have. I also have an Audio Alchemy Digital Transmission Interface listed for sale and can combine shipping if both items are purchased together. Not tested but I was told it works. I will pack well and ship quickly. Description: Single-box D/A provessor. Conversion: Bitstream, PDM—256x resampled. Data input sampling range: 40kHz–50kHz. Digital filter: 4x. Analog post filter: 3rd-order at 60kHz. Noise shaping: second-order. Inputs: coaxial on an RCA jack, optical on a Toslink jack. Outputs: RCA jacks, 2.75V output level at full scale. Three front-panel indicators: analog/digital power, incoming data lock. Frequency response: 20Hz–20kHz ±0.2dB. Resolution: 16 bits. THD+noise: –90dB. S/N ratio: greater than 93dB. Channel separation: 80dB (no frequency specified). Linearity: ±1dB at –90dB, ±2dB at –100dB. De-emphasis error: ±0.25dB.Dimensions: 8.5 W by 1.75 H (front panel), 7.4 W by 1.75 H by 5.75 D (chassis including jacks). Shipping weight: 5 lbs.

Tested and works great. Ships fast (within 1 business day) from a smoke and pet free facility! Please let me know if you have any questions, I am here to help! Thanks for looking and have an amazing day.

A chance to own a classic from AUDIO ALCHEMY and is the DIGITAL DECODING ENGINE- DDE v1.1. Used and tested and in excellent condition. Unit is a HIGH END, full function, outboard digital processor. Complete with coaxial and optical inputs provided via RCA and TOSLINK JACKS. It also has an absolute polarity switch and 3 LEDs that indicate when the unit is locked to an incoming signal. Included with the unit is the optional, AUDIO ALCHEMY POWER STATION ONE, HIGH CURRENT POWER SUPPLY! This was in my late brothers system and it sounds great! The optional (HIGH END) power supply makes a (world of difference) all around! Specs: frequency response, 20Hz - 20kHz +1-0.2dB, S/N < -86dB. No box or manual!--TAKING OFFERS!

DescriptionAll items are shown in the pictures. If you cannot tell from the pictures please contact us. Due to differences in region codes some games CDs DVDs etc. may not ?be available. The voltage of some electrical products may be different. Please make sure to check before purchasing. PaymentPlease pay within 2 days of winning the auction. Shipping There have been delays in delivery due to the global pandemic. There may be a significant delay in the scheduled delivery date. Delivery Time Economy delivery? 3 to 4 weeks (Tracking numbers are not reflected in Australia Canada and some regions.) Standard delivery 2 to 3 weeks Terms of Sale If payment is not confirmed within 2 days of purchase the order will be cancelled. Returns are accepted within 60 days.International Buyers - Please Note: Import duties and taxes are not included in the item price or shipping cost. Please check with your countrys customs office for additional costs before bidding or purchasing. Duties and taxes are not collected by the shipping company. Please check with your countrys customs office for additional costs before bidding or purchasing. The act of declaring goods at a lower value or declaring goods as gifts is prohibited by international governments.

Audio Alchemy Dpa-1 Stromverstärker TransistorDas Datenblatt dieses Produkts wurde ursprünglich auf Englisch verfasst. Unten finden Sie eine automatische Übersetzung ins Deutsche. Sollten Sie irgendwelche Fragen haben, kontaktieren Sie uns.ZahlungSeien Sie versichert, dass unser Shop eine Vielzahl von Zahlungsmethoden anbietet.Bitte zahlen Sie innerhalb von 5 Tagen nach Auktionsende.Über unsWir sind in Japan ansässig. Überprüfen Sie bei elektrischen Produkten den Hersteller und das Produkt und rechnen Sie die Spannung in das jeweilige Land um. Wir planen den Versand per FedEx oder DHL. Bitte kontaktieren Sie uns, da sich die Versandkosten in einigen Fällen ändern können. Es ist uns eine Freude, Sie glücklich zu machen, indem wir Ihnen unseren empfohlenen Artikel vorschlagen.Wenn Sie Fragen oder Wünsche zu Artikeln haben, wenden Sie sich bitte an uns.Internationale Käufer – Bitte beachten Sie:-Einfuhrzölle, Steuern und Gebühren sind nicht im Artikelpreis oder den Versandkosten enthalten. Diese Gebühren liegen in der Verantwortung des Käufers.- Bitte erkundigen Sie sich vor dem Bieten/Kauf beim Zollamt Ihres Landes, wie hoch diese zusätzlichen Kosten sein werden.-Diese Gebühren werden normalerweise von der liefernden Spedition (Versandfirma) oder bei der Abholung des Artikels erhoben – verwechseln Sie sie nicht mit zusätzlichen Versandkosten.-Wir kennzeichnen Warenwerte nicht unter dem Wert und kennzeichnen Artikel nicht als Geschenke. Die Vorschriften der US-amerikanischen und internationalen Regierung verbieten ein solches Verhalten.]]>Wir sind in Japan ansässig. Überprüfen Sie bei elektrischen Produkten den Hersteller und das Produkt und rechnen Sie die Spannung in das jeweilige Land um. Wir planen den Versand per FedEx oder DHL. Bitte kontaktieren Sie uns, da sich die Versandkosten in einigen Fällen ändern können. -Einfuhrzölle, Steuern und Gebühren sind nicht im Artikelpreis oder den Versandkosten enthalten. Diese Gebühren liegen in der Verantwortung des Käufers. -Diese Gebühren werden normalerweise von der liefernden Spedition (Versandfirma) oder bei der Abholung des Artikels erhoben – verwechseln Sie sie nicht mit zusätzlichen Versandkosten. -Wir kennzeichnen Warenwerte nicht unter dem Wert und kennzeichnen Artikel nicht als Geschenke. Die Vorschriften der US-amerikanischen und internationalen Regierung verbieten e Receiver Combo Features NA Number of Inputs NA Year Manufactured NA Audio Outputs NA Country/Region of Manufacture NA Unit Quantity NA Supported Modes NA Power NA Type NA Brand Audio Alchemy Audio Inputs NA Compatible Product NA California Prop 65 Warning NA Number of Channels NA Number of Outputs NA Unit Type NA Country Japan UPC NA Manufacturer Warranty NA Model NA Surround Sound Formats NA Amplifier Class NA Features NA Color NA MPN NA

Audio Alchemy Dpa-1M Paar Stromverstärker TransistorDas Datenblatt dieses Produkts wurde ursprünglich auf Englisch verfasst. Unten finden Sie eine automatische Übersetzung ins Deutsche. Sollten Sie irgendwelche Fragen haben, kontaktieren Sie uns.ZahlungSeien Sie versichert, dass unser Shop eine Vielzahl von Zahlungsmethoden anbietet.Bitte zahlen Sie innerhalb von 5 Tagen nach Auktionsende.Über unsWir sind in Japan ansässig. Überprüfen Sie bei elektrischen Produkten den Hersteller und das Produkt und rechnen Sie die Spannung in das jeweilige Land um. Wir planen den Versand per FedEx oder DHL. Bitte kontaktieren Sie uns, da sich die Versandkosten in einigen Fällen ändern können. Es ist uns eine Freude, Sie glücklich zu machen, indem wir Ihnen unseren empfohlenen Artikel vorschlagen.Wenn Sie Fragen oder Wünsche zu Artikeln haben, wenden Sie sich bitte an uns.Internationale Käufer – Bitte beachten Sie:-Einfuhrzölle, Steuern und Gebühren sind nicht im Artikelpreis oder den Versandkosten enthalten. Diese Gebühren liegen in der Verantwortung des Käufers.- Bitte erkundigen Sie sich vor dem Bieten/Kauf beim Zollamt Ihres Landes, wie hoch diese zusätzlichen Kosten sein werden.-Diese Gebühren werden normalerweise von der liefernden Spedition (Versandfirma) oder bei der Abholung des Artikels erhoben – verwechseln Sie sie nicht mit zusätzlichen Versandkosten.-Wir kennzeichnen Warenwerte nicht unter dem Wert und kennzeichnen Artikel nicht als Geschenke. Die Vorschriften der US-amerikanischen und internationalen Regierung verbieten ein solches Verhalten.]]>Wir sind in Japan ansässig. Überprüfen Sie bei elektrischen Produkten den Hersteller und das Produkt und rechnen Sie die Spannung in das jeweilige Land um. Wir planen den Versand per FedEx oder DHL. Bitte kontaktieren Sie uns, da sich die Versandkosten in einigen Fällen ändern können. -Einfuhrzölle, Steuern und Gebühren sind nicht im Artikelpreis oder den Versandkosten enthalten. Diese Gebühren liegen in der Verantwortung des Käufers. -Diese Gebühren werden normalerweise von der liefernden Spedition (Versandfirma) oder bei der Abholung des Artikels erhoben – verwechseln Sie sie nicht mit zusätzlichen Versandkosten. -Wir kennzeichnen Warenwerte nicht unter dem Wert und kennzeichnen Artikel nicht als Geschenke. Die Vorschriften der US-amerikanischen und internationalen Regierung verbieten e Receiver Combo Features NA Number of Inputs NA Year Manufactured NA Audio Outputs NA Country/Region of Manufacture NA Unit Quantity NA Supported Modes NA Power NA Type NA Brand Audio Alchemy Audio Inputs NA Compatible Product NA California Prop 65 Warning NA Number of Channels NA Number of Outputs NA Unit Type NA Country Japan UPC NA Manufacturer Warranty NA Model NA Surround Sound Formats NA Amplifier Class NA Features NA Color NA MPN NA

Audio Alchemy Ddp-1 Ps-5 Set Kontrolle VerstärkerDas Datenblatt dieses Produkts wurde ursprünglich auf Englisch verfasst. Unten finden Sie eine automatische Übersetzung ins Deutsche. Sollten Sie irgendwelche Fragen haben, kontaktieren Sie uns.ZahlungSeien Sie versichert, dass unser Shop eine Vielzahl von Zahlungsmethoden anbietet.Bitte zahlen Sie innerhalb von 5 Tagen nach Auktionsende.Über unsWir sind in Japan ansässig. Überprüfen Sie bei elektrischen Produkten den Hersteller und das Produkt und rechnen Sie die Spannung in das jeweilige Land um. Wir planen den Versand per FedEx oder DHL. Bitte kontaktieren Sie uns, da sich die Versandkosten in einigen Fällen ändern können. Es ist uns eine Freude, Sie glücklich zu machen, indem wir Ihnen unseren empfohlenen Artikel vorschlagen.Wenn Sie Fragen oder Wünsche zu Artikeln haben, wenden Sie sich bitte an uns.Internationale Käufer – Bitte beachten Sie:-Einfuhrzölle, Steuern und Gebühren sind nicht im Artikelpreis oder den Versandkosten enthalten. Diese Gebühren liegen in der Verantwortung des Käufers.- Bitte erkundigen Sie sich vor dem Bieten/Kauf beim Zollamt Ihres Landes, wie hoch diese zusätzlichen Kosten sein werden.-Diese Gebühren werden normalerweise von der liefernden Spedition (Versandfirma) oder bei der Abholung des Artikels erhoben – verwechseln Sie sie nicht mit zusätzlichen Versandkosten.-Wir kennzeichnen Warenwerte nicht unter dem Wert und kennzeichnen Artikel nicht als Geschenke. Die Vorschriften der US-amerikanischen und internationalen Regierung verbieten ein solches Verhalten.]]>Wir sind in Japan ansässig. Überprüfen Sie bei elektrischen Produkten den Hersteller und das Produkt und rechnen Sie die Spannung in das jeweilige Land um. Wir planen den Versand per FedEx oder DHL. Bitte kontaktieren Sie uns, da sich die Versandkosten in einigen Fällen ändern können. -Einfuhrzölle, Steuern und Gebühren sind nicht im Artikelpreis oder den Versandkosten enthalten. Diese Gebühren liegen in der Verantwortung des Käufers. -Diese Gebühren werden normalerweise von der liefernden Spedition (Versandfirma) oder bei der Abholung des Artikels erhoben – verwechseln Sie sie nicht mit zusätzlichen Versandkosten. -Wir kennzeichnen Warenwerte nicht unter dem Wert und kennzeichnen Artikel nicht als Geschenke. Die Vorschriften der US-amerikanischen und internationalen Regierung verbieten e Receiver Combo Features NA Number of Inputs NA Year Manufactured NA Audio Outputs NA Country/Region of Manufacture NA Unit Quantity NA Supported Modes NA Power NA Type NA Brand Audio Alchemy Audio Inputs NA Compatible Product NA California Prop 65 Warning NA Number of Channels NA Number of Outputs NA Unit Type NA Country Japan UPC NA Manufacturer Warranty NA Model NA Surround Sound Formats NA Amplifier Class NA Features NA Color NA MPN NA

PaymentRest assured that our store offers a variety of payment methods.Please pay within 5 days after auction is finished. About UsWe are located in Japan.For electrical products check the manufacturer and product and convert to the voltage of each country.We plan to ship by FedEx or DHL.Please contact us as the shipping fee can be changed in some cases. Its our pleasure to make you happy by proposing our recommend item.If you have any questions or request about items please feel free to ask us. International Buyers - Please Note:-Import duties taxes and charges are not included in the item price or shipping charges. These charges are the buyers responsibility.-Please check with your countrys customs office to determine what these additional costs will be prior to bidding/buying.-These charges are normally collected by the delivering freight (shipping) company or when you pick the item up - do not confuse them for additional shipping charges.-We do not mark merchandise values below value or mark items as - gifts - The US and International government regulations prohibit such behavior.>

PaymentRest assured that our store offers a variety of payment methods.Please pay within 5 days after auction is finished. About UsWe are located in Japan.For electrical products check the manufacturer and product and convert to the voltage of each country.We plan to ship by FedEx or DHL.Please contact us as the shipping fee can be changed in some cases. Its our pleasure to make you happy by proposing our recommend item.If you have any questions or request about items please feel free to ask us. International Buyers - Please Note:-Import duties taxes and charges are not included in the item price or shipping charges. These charges are the buyers responsibility.-Please check with your countrys customs office to determine what these additional costs will be prior to bidding/buying.-These charges are normally collected by the delivering freight (shipping) company or when you pick the item up - do not confuse them for additional shipping charges.-We do not mark merchandise values below value or mark items as - gifts - The US and International government regulations prohibit such behavior.>

PaymentRest assured that our store offers a variety of payment methods.Please pay within 5 days after auction is finished. About UsWe are located in Japan.For electrical products check the manufacturer and product and convert to the voltage of each country.We plan to ship by FedEx or DHL.Please contact us as the shipping fee can be changed in some cases. Its our pleasure to make you happy by proposing our recommend item.If you have any questions or request about items please feel free to ask us. International Buyers - Please Note:-Import duties taxes and charges are not included in the item price or shipping charges. These charges are the buyers responsibility.-Please check with your countrys customs office to determine what these additional costs will be prior to bidding/buying.-These charges are normally collected by the delivering freight (shipping) company or when you pick the item up - do not confuse them for additional shipping charges.-We do not mark merchandise values below value or mark items as - gifts - The US and International government regulations prohibit such behavior.>

Audio Alchemy DDE V1 DAC Please see photos for any imperfections. What you see is what you get. The Audio Alchemy Digital Decoding Engine v1.0 DAC might just be right for some looking to improve an inexpensive CD player (or DVD player) with improved detail and transparency. Front panel: Three LEDs show analog, digital and power and switches for digital coaxial or TOSlink optical inputs as well as an absolute polarity (0 / 180 degrees) switch. Rear panel: DC input from the supplied power supply, coaxial digital input, TOSlink optical input, I2S bus and an on/off switch for I2S port, coaxial digital output and the left and right phono outputs. Compact size 226mm Wide x 45mm High x 135mm Deep (DAC) plus an external power supply (51 mm x 63.5 mm x 38 mm). Colour is black, case and fascia is metal construction.

Audio Alchemy DAC DDE v.1.1 with custom power supply.

Audio Alchemy Digital Decoding Engine V3.0 + XDP Power Station + RW-1 RemoteMultibit sound quality - AD1862N DAC chips From my personal equipment collection. This DAC has been in my headphone rig for several months getting regular use. The XDP Power Station has the same specifications as the Power Station 4 and works fine. The DDE V3.0 has the optional specially programmed Intel 87C51 micro-controller installed. This allows remote volume control, input selection, channel balance and muting of the DAC via the RW-1 remote. The remote is not necessary to use the DAC.I am selling due to downsizing my audio equipment collection. I have another DDE 3.0 that I am now using that works fine, but does not have the optional Intel chip like the one that is listed for sale here. That is why the remote is being sold in this listing. A printed copy of the operating instructions for the DDE 3.0 and RW-1 will be included. As information, I prefer the DDE 3.0 with the XDP or PS4 power supplies versus the PS2 or PS3 units, as I find the PS2 and PS3 units to be mechanically noisy due to transformer hum.I have tested all 3 digital inputs (optical, coaxial, and I2S) and all work fine. The I2S input must be connected to a DTI device that has an I2S output. I have a DTI unit (not for sale) that the I2S connection has been tested with. I also have played HDCD discs through the DAC and the HDCD light comes on. I am including a BNC to RCA adapter to allow using a standard RCA digital coax cable. I have the internal gain control set at position 1 for an output of 1.14 V RMS. There are 3 other settings that can be used by changing the shorting plugs to different jumper positions. The RW-1 remote works fine in all listed functions, as noted above. There is a small micro switch on the side of the remote that allows it to function with the DDE V3.0. Set the slide switch (on the right side of the RW-1) to position 3; all the way back, towards the battery end of the remote. The RW-1 also will control the DLC preamp, which I used to own. Will be double boxed for shipping. If you have not owned Audio Alchemy gear before, I will point out that the instructions recommend doing all cable connections to the DAC before connecting the power cable. I have followed this method with all the various Audio Alchemy gear I have owned with no issues. This DAC was one of Stereophiles Joint Budget Components of 1996.

UNTESTED BUT APPEARS TO POWER UP PROPERLY. I am home audio illiterate, so bid accordingly. I acquired this in a home sale. All offers will be considered Sold as is. No returns

AUDIO ALCHEMY Digital Decoding Engine v1.1. with Power Supply Used for six months, then stored. In Mint Condition

Selling an excellent working and looking Audio Alchemy HPA V 1.0 Headphone amplifier. Amplifier is in good working condition, and sounds great! I had no problem driving my Beyerdynamic DT-880s with it. Power button can be a bit sticky at times and could use a cleaning. Power supply is included with the unit. Shipping will be $25 to the Lower 48 States only, direct signature will be required upon delivery!

Rare item from Audio Alchemy. I got it in 2020 as a NOS item in the original box. It has been in use in my headphone rig for the past 3 years. I am selling it as I bought a tube hybrid headphone amp to try and I dont need 2 headphone amps. This in VG++ condition (see photos). The amp does not have a power light, so I didnt take any photos of it plugged in. That said, it was my daily driver for about 3 years and was flawless in operation with Grado or AKG cans. This amp runs warm to hot due to its class A design. This is normal. Review from Stereophile:Audio Alchemy HPA v1.0 headphone amplifierWes Phillips | Dec 3, 2006 | First Published: Jul 3, 1996 For headphone listeners, this is truly a golden age—we have multiple choices at many different price levels. During the course of this review, I had as many as five headphone amplifiers (and, in several cases, multiple power supplies) set up for comparison. Yet many people dont understand why we might want a headphone amp in the first place.Heres a reason: I live with an intelligent, dynamic, astoundingly tolerant woman, who doesnt seem to mind (much) that Ive turned every room of our house into a mad scientists maze of wires, boxes, and speakers. Yet, having gone that far, she unreasonably refuses to be forced to share my job with me 24 hours a day. Sometimes she insists on sleeping. So I need to use headphones at certain times of the day (and night, of course)—even though I have access to some of the finest preamps on earth. None of which, I might add, sport a headphone jack. Thats the most basic reason one might desire a headphone amp: simply to have a place to plug in your headphones. But portable cassette and CD players, mass-market receivers, and VCRs, laserdisc players, and A/V receivers all typically boast headphone connections, so people who own those components dont need a headphone amplifier, right? True, you can plug a pair of phones straight in to those components, but their headphone sections are vestigial at best. The amplifying circuits arent particularly powerful—or clean, for that matter. They lack clarity and cohesion, and they wash out a lot of tonal color—listen for any length of time and youll be reaching for the analgesic bottle. Besides, a lot of us connect our laserdisc players to D/A converters for better sound, and you lose the benefits of that when you employ the players phone jack. But the main reason you should consider using a headphone amplifier is the complexity of the task of driving headphones in the first place. Think about what conventional headphones are: moving-coil transducers with impedances that vary from 32 ohms to 600 ohms, with sensitivities that vary by as much as 27dB. Thats a lot to ask a 27-cent op-amp chip to cope with. Audio Alchemys solution to this problem is, like all of their products, compact and well-thought-out. At $259, the HPA v1.0 is the least expensive amp in this survey—and at 5.5 by 4 by 1.5, its for darn skippy the smallest. It can fit in an audiophiles shirt pocket—if we take the pocket-protector out first. It comes with an outboard power supply, the Power Station One, but it can be used with AAs Power Station Three, which almost triples the PS1s 250mA output—and at $259, also doubles the price. If you wish to use the HPA on the road, it runs off AAs Robyn I DC battery power supply, but—since the HPA runs in class-A—not for long (about two hours). Connections are minimal; the rear panel has a mini-jack power supply connection and two pair of RCA jacks: source input and pass-through output (not affected by the volume control). This last is a thoughtful addition for those who must plug the HPA into their only tape-loop; it means they still have the use of the loop for a tape deck. The front panel has a ¼ stereo phone jack in the middle, a fluted volume control knob to its left, and a button engaging HeadRooms Audio Image Processor to its right. Thats it. Need I mention that, in a unit the size of a cigarette pack, the HPA v1.0s circuit paths are extremely short? The small chassis is packed with amazingly high-quality parts, given its list price. Voltage gain is via Analog Devices OP-275 op-amps running in pure class-A, while complementary pairs of Toshiba output transistors (also running in class-A) handle the current gain for the discrete output stage. (These Toshibas are also used in AAs OM-150 and OM-50A power amplifiers as pre-driver transistors.) The volume control is a precision-matched, conductive-plastic Dale potentiometer that has a seriously sensuous, silky feel—and is billed as having superlative tracking over its entire range. I asked Audio Alchemys Richard Liddell how they could afford to pack all of that into a product that was going to hit the street for $200. We tend to use as many of the same parts as possible—that way we know what they can do and we can buy them in enormous quantities, which makes them affordable. Not that Im complaining, mind you. Youve noticed, of course, that the HPA has HeadRooms Audio Image Processor; Audio Alchemy is one of only three companies licensing this technology. (The other two, Sonic Frontiers and Counterpoint have not yet sent us products to review.) Weve written at some length about HeadRooms own units (Vol.17, Nos.1 & 2), paying specific attention to the effects of the AIP. For a detailed discussion of that process, refer to my review of the Home HeadRoom (Vol.18 No.1). Essentially, what the AIP does is spread the sound, giving a more realistic sense of lateral cohesion, avoiding that annoying left ear/center-of-head/right ear headphone signature. It adds a sense of depth as well. I find this circuit addicting and miss it when its not there or not engaged. I think that all high-end manufacturers should consider it essential in a headphone amplifier, so Im particularly pleased to see that several of them are beginning to use it—especially at this price point, where most companies would be looking for stuff to leave out. Tota in minimis existit naturaThe first thing I noticed when listening to the HPA v1.0, was the control that the amp manifested over the headphones. Its 6.5V output immediately asserted itself. The sound was big, dynamic, and warm—with lots of low-level information. Listening to the Paniagua Groups disc, I clearly heard great amounts of spatial detail (even more with HeadRooms AIP engaged). I did find the HPAs warmth and that of the Grado RS1s combined to be far too much of a good thing, however. Ironically, this excess of richness served to leach liquidity from the sonic picture—things sounded just too darn warmnfuzzy to be believable. That big bass drums attack was aggressive, but I could not hear the rattles clearly. Switching over to the HD580 Jubilees, I realized that the HPA/RS1 combo was obscuring detail, especially in the round fullness of the ouds string tone. The leaner midrange of the Jubilees (not necessarily their most endearing trait) and their superior bass tautness restored musical and low-level ambient information. Third Uncle had drive and slam galore with both headsets, but sounded much more muscular with the Sennheisers. Then I switched power supplies, having finally gotten my Power Station Three up and running. (Originally, I had been sent a PS3 with a ¼A fuse, which proved to be incredibly persnickety driving my Audio Alchemy Digital Line Control preamp. I discovered, after blowing four fuses trying to drive the HPA, that this is the wrong value—it should have been ½A all along.) Switching to the Power Station Three, things just got better. The difference in bass was profound: tighter, more controlled, with better pitch definition. The highs also sounded sweeter, with less graininess and much better clarity in the differentiation of adjacent tones (and of similar consonant attacks like p, b and t). Now we were talking! HeadroomHeadRooms own $399 HeadRoom Supreme headphone amplifier seemed the logical comparison to the HPA v1.0/PS3. The portable HeadRoom can run off either a small wall-wart, or an external four-D-cell power pack. I prefer its sound with the battery pack, so I used that for my comparisons. They were both very good, but the Audio Alchemy sounded just a shade coarser, with a bit of grit in the upper octaves. On the Eno track, this added an edge that was not out of keeping with the music—an effect that I enjoyed, even as I questioned its faithfulness to the signal. The Audio Alchemy controlled the headphones with greater authority, however, and propelled Brian Turringtons bass-line along like crazy. The Paniagua track, of course, did not benefit in the same way from the Alchemys edginess. There the leading edge of the plucked oud just sounded coarsened and somewhat fuzzy. The frame drum had greater body and slam, but its reverberation in the room sounded diminished. The HeadRoom was, to my ears, slightly but significantly better. However, you need to consider a few things before deciding which you want. If you travel, the HeadRoom can play off of its battery pack for over 20 hours—which will get you pretty far around the world before you have to recharge. The Audio Alchemy, run by the Robyn power supply, will only play for a couple of hours. On the other hand, if youre going to add headphone capacity to an existing preamplifier, the HPAs pass-through is a real boon. I fed the signal from the AAs outputs into the SHA-Gold, compared them to the signal coming into the SHA-Gold straight out of the CD1, and heard virtually no difference. (Im hedging here, because I dont want you to lose all respect for me—the fact is I was hard-pressed to detect any change.) This is another feature that I think every headphone amp should have and it may well be enough to convince many of you to test-drive an HPA v1.0. I also approve of the upgradability of the power supply. Its true that it can double the price of the unit, but you get to choose what level of performance you desire (or can afford). All in all, Audio Alchemys HPA v1.0 is well-thought-out and implemented. I found a lot to like in its sound and found several of its features indispensable. Its an impressive product at an affordable price.

Rare item from Audio Alchemy. I got it in 2020 as a NOS item in the original box. It has been in use in my headphone rig for the past 3 years. I am selling it as I bought a tube hybrid headphone amp to try and I dont need 2 headphone amps. This in VG++ condition (see photos). The amp does not have a power light, so I didnt take any photos of it plugged in. That said, it was my daily driver for about 3 years and was flawless in operation with Grado or AKG cans. This amp runs warm to hot due to its class A design. This is normal. Review from Stereophile:Audio Alchemy HPA v1.0 headphone amplifierWes Phillips | Dec 3, 2006 | First Published: Jul 3, 1996 For headphone listeners, this is truly a golden age—we have multiple choices at many different price levels. During the course of this review, I had as many as five headphone amplifiers (and, in several cases, multiple power supplies) set up for comparison. Yet many people dont understand why we might want a headphone amp in the first place.Heres a reason: I live with an intelligent, dynamic, astoundingly tolerant woman, who doesnt seem to mind (much) that Ive turned every room of our house into a mad scientists maze of wires, boxes, and speakers. Yet, having gone that far, she unreasonably refuses to be forced to share my job with me 24 hours a day. Sometimes she insists on sleeping. So I need to use headphones at certain times of the day (and night, of course)—even though I have access to some of the finest preamps on earth. None of which, I might add, sport a headphone jack. Thats the most basic reason one might desire a headphone amp: simply to have a place to plug in your headphones. But portable cassette and CD players, mass-market receivers, and VCRs, laserdisc players, and A/V receivers all typically boast headphone connections, so people who own those components dont need a headphone amplifier, right? True, you can plug a pair of phones straight in to those components, but their headphone sections are vestigial at best. The amplifying circuits arent particularly powerful—or clean, for that matter. They lack clarity and cohesion, and they wash out a lot of tonal color—listen for any length of time and youll be reaching for the analgesic bottle. Besides, a lot of us connect our laserdisc players to D/A converters for better sound, and you lose the benefits of that when you employ the players phone jack. But the main reason you should consider using a headphone amplifier is the complexity of the task of driving headphones in the first place. Think about what conventional headphones are: moving-coil transducers with impedances that vary from 32 ohms to 600 ohms, with sensitivities that vary by as much as 27dB. Thats a lot to ask a 27-cent op-amp chip to cope with. Audio Alchemys solution to this problem is, like all of their products, compact and well-thought-out. At $259, the HPA v1.0 is the least expensive amp in this survey—and at 5.5 by 4 by 1.5, its for darn skippy the smallest. It can fit in an audiophiles shirt pocket—if we take the pocket-protector out first. It comes with an outboard power supply, the Power Station One, but it can be used with AAs Power Station Three, which almost triples the PS1s 250mA output—and at $259, also doubles the price. If you wish to use the HPA on the road, it runs off AAs Robyn I DC battery power supply, but—since the HPA runs in class-A—not for long (about two hours). Connections are minimal; the rear panel has a mini-jack power supply connection and two pair of RCA jacks: source input and pass-through output (not affected by the volume control). This last is a thoughtful addition for those who must plug the HPA into their only tape-loop; it means they still have the use of the loop for a tape deck. The front panel has a ¼ stereo phone jack in the middle, a fluted volume control knob to its left, and a button engaging HeadRooms Audio Image Processor to its right. Thats it. Need I mention that, in a unit the size of a cigarette pack, the HPA v1.0s circuit paths are extremely short? The small chassis is packed with amazingly high-quality parts, given its list price. Voltage gain is via Analog Devices OP-275 op-amps running in pure class-A, while complementary pairs of Toshiba output transistors (also running in class-A) handle the current gain for the discrete output stage. (These Toshibas are also used in AAs OM-150 and OM-50A power amplifiers as pre-driver transistors.) The volume control is a precision-matched, conductive-plastic Dale potentiometer that has a seriously sensuous, silky feel—and is billed as having superlative tracking over its entire range. I asked Audio Alchemys Richard Liddell how they could afford to pack all of that into a product that was going to hit the street for $200. We tend to use as many of the same parts as possible—that way we know what they can do and we can buy them in enormous quantities, which makes them affordable. Not that Im complaining, mind you. Youve noticed, of course, that the HPA has HeadRooms Audio Image Processor; Audio Alchemy is one of only three companies licensing this technology. (The other two, Sonic Frontiers and Counterpoint have not yet sent us products to review.) Weve written at some length about HeadRooms own units (Vol.17, Nos.1 & 2), paying specific attention to the effects of the AIP. For a detailed discussion of that process, refer to my review of the Home HeadRoom (Vol.18 No.1). Essentially, what the AIP does is spread the sound, giving a more realistic sense of lateral cohesion, avoiding that annoying left ear/center-of-head/right ear headphone signature. It adds a sense of depth as well. I find this circuit addicting and miss it when its not there or not engaged. I think that all high-end manufacturers should consider it essential in a headphone amplifier, so Im particularly pleased to see that several of them are beginning to use it—especially at this price point, where most companies would be looking for stuff to leave out. Tota in minimis existit naturaThe first thing I noticed when listening to the HPA v1.0, was the control that the amp manifested over the headphones. Its 6.5V output immediately asserted itself. The sound was big, dynamic, and warm—with lots of low-level information. Listening to the Paniagua Groups disc, I clearly heard great amounts of spatial detail (even more with HeadRooms AIP engaged). I did find the HPAs warmth and that of the Grado RS1s combined to be far too much of a good thing, however. Ironically, this excess of richness served to leach liquidity from the sonic picture—things sounded just too darn warmnfuzzy to be believable. That big bass drums attack was aggressive, but I could not hear the rattles clearly. Switching over to the HD580 Jubilees, I realized that the HPA/RS1 combo was obscuring detail, especially in the round fullness of the ouds string tone. The leaner midrange of the Jubilees (not necessarily their most endearing trait) and their superior bass tautness restored musical and low-level ambient information. Third Uncle had drive and slam galore with both headsets, but sounded much more muscular with the Sennheisers. Then I switched power supplies, having finally gotten my Power Station Three up and running. (Originally, I had been sent a PS3 with a ¼A fuse, which proved to be incredibly persnickety driving my Audio Alchemy Digital Line Control preamp. I discovered, after blowing four fuses trying to drive the HPA, that this is the wrong value—it should have been ½A all along.) Switching to the Power Station Three, things just got better. The difference in bass was profound: tighter, more controlled, with better pitch definition. The highs also sounded sweeter, with less graininess and much better clarity in the differentiation of adjacent tones (and of similar consonant attacks like p, b and t). Now we were talking! HeadroomHeadRooms own $399 HeadRoom Supreme headphone amplifier seemed the logical comparison to the HPA v1.0/PS3. The portable HeadRoom can run off either a small wall-wart, or an external four-D-cell power pack. I prefer its sound with the battery pack, so I used that for my comparisons. They were both very good, but the Audio Alchemy sounded just a shade coarser, with a bit of grit in the upper octaves. On the Eno track, this added an edge that was not out of keeping with the music—an effect that I enjoyed, even as I questioned its faithfulness to the signal. The Audio Alchemy controlled the headphones with greater authority, however, and propelled Brian Turringtons bass-line along like crazy. The Paniagua track, of course, did not benefit in the same way from the Alchemys edginess. There the leading edge of the plucked oud just sounded coarsened and somewhat fuzzy. The frame drum had greater body and slam, but its reverberation in the room sounded diminished. The HeadRoom was, to my ears, slightly but significantly better. However, you need to consider a few things before deciding which you want. If you travel, the HeadRoom can play off of its battery pack for over 20 hours—which will get you pretty far around the world before you have to recharge. The Audio Alchemy, run by the Robyn power supply, will only play for a couple of hours. On the other hand, if youre going to add headphone capacity to an existing preamplifier, the HPAs pass-through is a real boon. I fed the signal from the AAs outputs into the SHA-Gold, compared them to the signal coming into the SHA-Gold straight out of the CD1, and heard virtually no difference. (Im hedging here, because I dont want you to lose all respect for me—the fact is I was hard-pressed to detect any change.) This is another feature that I think every headphone amp should have and it may well be enough to convince many of you to test-drive an HPA v1.0. I also approve of the upgradability of the power supply. Its true that it can double the price of the unit, but you get to choose what level of performance you desire (or can afford). All in all, Audio Alchemys HPA v1.0 is well-thought-out and implemented. I found a lot to like in its sound and found several of its features indispensable. Its an impressive product at an affordable price.

Audio Alchemy Digital Decoding Engine v1.0 with power supplyThe chip set is the Philips SAA7274 S/PDIF receiver and decoder coupled with Philipss SAA7323 Bitstream DAC/filter chip. The S/PDIF receiver circuit is unusual in that a Voltage Controlled Oscillator (VCO) supplies the reference Phase Lock Loop (PLL) frequency rather than the ubiquitous crystal clock generator. An additional chip next to the 7274 gets a reference voltage from the 7274 and outputs a frequency back to the decoder chip. This circuits job is to recover the clock imbedded in the incoming S/PDIF signal. This technique reportedly results in lower clock jitter than standard PLL implementations (several hundred picoseconds rather than 2–5 nanoseconds). In addition, the DDE will lock to any incoming sampling frequency between 40kHz and 50kHz.

DescriptionCondition:Excellent. Please check the photo for details. ShippingStandard Shipping (Japan Post , FedEx , DHL) The package will arrive 5-14 days after shipment. International Buyers - Please Note:Import duties, taxes, and charges are not included in the item price or shipping cost.These charges are the buyers responsibility.Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying. If the cancellation is due to the buyer, we will charge a PayPal fee. If there is a remote charge for your address, we will charge you for additional shipping. Thank you for your understanding.

DescriptionCondition:Used. Beautiful item with little use. Accessories (pair): Outer box, inner box, manual, power cable (all pairs) Please check the photo for details. ShippingStandard Shipping (Japan Post , FedEx , DHL) The package will arrive 5-14 days after shipment. International Buyers - Please Note:Import duties, taxes, and charges are not included in the item price or shipping cost.These charges are the buyers responsibility.Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying. If the cancellation is due to the buyer, we will charge a PayPal fee. If there is a remote charge for your address, we will charge you for additional shipping. Thank you for your understanding.

Up for sale is this Audio Alchemy Digital Decoding Engine DAC v1.0 - No Power Supply Acquired from the estate of an Audiophile

DAC Audio Alchemy Digital Decoding Engine v1.1 second owner, really a great dac in perfect working order - This is high quality DAC developed by Audio Alchemy in the 90es and made in the USA. It is very well regarded by many audiophiles and has excellent reviews. The DAC is in good working condition with clean front and rear panels, very minimal marks. Built with the best choice of high quality components and classic Crystal 4303 dac chip. The DAC is capable for very precise sound reproduction due to careful design and engineering.It is famous for its very analogue like and detailed sound reproductionThe sonic performance of this DAC is exactly what you can expect from the classic Audio Alchemy product - accurate and dynamic sound reproduction with perfect detalisation. solid shipping with insurance For International Sales, Contact me, please SHIPPING INFORMATION ALL POSTAGE PRICES ARE ESTIMATES – FINAL POSTAGE PRICE DEPENDS ON BUYER LOCATION AND FINAL VALUE INSURANCE