One used (qty1) Sonic Imagery Labs Model 994Enh-Ticha Dual Discrete Opamp. Model 994Enh-Ticha Dual Discrete HDAM Operational Amplifier (DIP8 dual) No other Discrete Op-Amp on the market comes close to our fully production tested specifications. Dont waste your time and money on High Definition Audio Modules which require a ground wire to operate and have barely enough gain to remain stable and purport to have great THD specs. Dont waste your money on supposedly hand matched leaded transistors for differential input pairs, a few minutes after warm up they arent matched anymore and your CMRR and offset is now gone. Theres a lot of crap out there. Download our datasheet, read, and understand that knowledge is the first step to high performance. Sonic Imagery Labs engineers its products for high performance. General Description: 994Enh-Ticha Discrete Operational Amplifier DIP8 The 994Enh-Ticha is a dual high performance discrete operational amplifier designed for professional audio applications and areas where ultra-low noise, low distortion and highly linear uncolored performance is required. It was designed as an performance upgrade replacement universal dual op-amp gain block. The pin outs conform to the standard 8 pin dual in-line monolithic IC package, allowing direct replacement. See table 1. on page 6 of data sheet for typical dual monolithic operational amplifiers which can be upgraded. The all-discrete SMT design utilizes an ultra-precision differential super-matched transistor pair specifically designed to meet the requirements of ultra-low noise and ultra-low THD audio systems. In addition to the enhanced input stage, the 994Enh-Ticha uses high performance temperature stable power supply independent current sources. Supply independent current sources allow the bias to remain locked at the optimum operating point regardless of supply voltage. Dual matched pair temperature stable current mirrors, dual matched pair active current loads give the Model 994 its outstanding power supply rejection performance. The enhanced low distortion Class-A output driver stage can sink or source 150mA allowing this module to drive transformers if required. Each amplifier is matched for noise, offset and distortion to within 0.1% of each other and both amplifier channels meet or exceed published specifications. The 994Enh-Ticha op amp is a true bipolar op amp and behaves as such. It does not require a flying ground lead as do other designs on the market. Because the 994Enh is a true op amp, It can also be operated in single supply applications as long as external biasing has been implemented correctly. Features: • Ultra Low Total Harmonic Distortion, 0.0003 THD+N @ 1kHz • Ultra Low Noise 0.92nV/rtHz typical • High Current Output Drive >150mA @ ±24V supply) • +26dBu Output Levels (into 600 ohms @ ±24V supply) • Standard 8 pin DIP Footprint • Operates over ±7.5V to ±24V supply rails • Operating Current 17ma • Voltage Gain Open Loop 118dB • Lower output offset voltage than existing counterparts • Lower input leakage current than existing counterparts • Particular emphasis on audio performance • Designed, assembled and produced in the USA • 3 Year Warranty Applications: • Low Impedance Line Amplifiers and Drivers • Active Filters and Equalizers • Summing/Mixer Amplifiers • High Performance Microphone Preamplifiers • High Performance A/D and D/A front end Preamplifier • High Performance D/A I-V convertors • High Current Buffer Amplifier

Topping A90 Discrete (A90D) headphone amplifier with NFCA. Lightly used item in very good condition. Tested, working. Comes with UK power cable and remote control (remote requires 2x AAA batteries, not included). Includes only what is shown in photos. Packaging shows some wear. Free UK postage.

This is a high-quality balanced headphone amplifier made by TOPPING, called the A90 Discrete. It is designed to enhance your audio experience by providing a clean and powerful sound. This amplifier is perfect for use with home audio systems and is compatible with a wide range of headphones. With its compact design and easy-to-use interface, the TOPPING A90 Discrete is ideal for use in a variety of settings, including home theaters, music studios, and even on-the-go. It is built to last and is designed to deliver outstanding performance every time. Whether youre a music lover or a professional audio engineer, this headphone amplifier is sure to meet your needs. It also has a pre amp capability. It is in almost mint condition. Works perfectly. Was in use until last week, when I upgraded to a Headamp amplifier. It comes with an original box, a remote, a power cord, a headphone jack converter. It has a balanced XLR headphone jack, a 4.5 mm balanced jack and a single ended 6mm jack. Simply amazing. I love Topping equipment and I have their Centaurus R2R DAC. A new one lists for $599 at Apos Audio. This is a great deal. Smoke-free house. Beautifully cared for.

** Reasonable Best Offers Happily Considered ** This is a stereo Class AB amplifier with internal bridging option, analog volume rotary attenuator control, 3 XLR-TRS inputs, 12v Trigger, and dual gain levels. This is an astonishingly good unit. It tested as one of the top three amplifiers ever by Audio Science Review. The power supply is included. Everything works perfectly and is in like-new condition. This unit was barely used. Im selling because I got something smaller for my office system. ------ Photos are of exact item for sale here. Sold as-is. Shipping by UPS or USPS -or- FREE Local Pick-Up from Astoria, NY 11102.-----------------Bring the magic of NFCA circuitry to your speakersIntroducing the LA90 Discrete Amplifier, a high-fidelity audio solution that brings the benefits of discrete NFCA power amplifier circuitry to your listening sessions. This is a brand-new iteration of the LA90 model that features greater power in stereo mode, advanced signal-to-noise ratio for cleaner amplification, and wider dynamic range for even greater sonic reproduction. Explore the wonders of discrete NFCA circuitryThe LA90 Discrete features a cutting-edge discrete NFCA (Nested Feedback Composite Amplifier) power amplifier circuit, which comprises individual components optimized for audio performance, rather than relying on integrated circuits. This design delivers superior sound quality by reducing distortion, improving linearity, and providing greater control over the audio signal.Versatile operation with stereo and mono modesThe LA90 Discrete offers both stereo and mono modes, providing flexibility for a variety of audio setups. In stereo mode, it delivers 120W x2 @4? and 66W x2 @8?. In mono mode, the LA90 Discrete provides an impressive 180W @4? and 220W @8?.Gain settings for optimal audio controlWith 2-step gain settings, the LA90 Discrete allows users to fine-tune their audio experience. In stereo mode, gain settings include +9.4dB and +19.4dB, while mono mode offers +15.4dB and +25.4dB.Robust all-aluminum enclosure with passive coolingThe high-precision CNC machined all-aluminum enclosure not only looks sleek but also provides reliable heat dissipation through passive cooling on both sides. This ensures the LA90 Discrete remains cool and performs optimally even when the evening gets away from you.Seamless integration with 12V trigger interfaceThe LA90 Discrete comes equipped with a 12V trigger input and output trigger interface, allowing for easy integration with other devices. This feature enables users to switch multiple devices on and off simultaneously without the hassle of doing so individually.Whats the difference: LA90 Discrete NFCA Power Amplifier vs LA90 Power AmplifierThe LA90 Discrete NFCA version features the cutting-edge discrete NFCA (Nested Feedback Composite Amplifier) power amplifier circuit. This design uses individual components optimized for audio performance, delivering superior sound quality by reducing distortion, enhancing linearity, and providing greater control over the audio signal. The LA90 Power Amplifier version is now discontinued. Read more here.Product highlightsNewly-developed discrete NFCA power amplifier circuitStereo and mono operation modes2-step gain settings3x XLR/TRS inputsSelectable input modes: Volume and bypassHigh-precision CNC machined all-aluminum enclosurePassive cooling for reliable heat dissipation12V trigger interface for seamless integrationSpecsSee imagesWhats includedLA90 Discrete AmplifierAC to DC power adapterAC cableJumper cableUser manualWarranty card

Onkyo A-9150 2-channel Integrated Stereo Amplifier. Audiophile-grade with built-in DAC and phono input and comes with the original remote in the original box. This amplifier is in great condition and sounds awesome! Building on acclaim for the award-winning A-9010, Onkyo raises the bar for musicality in the entry class with its A-9150 Integrated Stereo Amplifier. Unique technologies coalesce around a refined amplification system to deliver outstanding transient response, superb dynamics, lifelike sound-staging, and nuanced articulation of your favorite analog or digital music. Enjoy high-resolution stereo sound with the Onkyo A-9150 2-Channel 120W Home Theater Power Amplifier. It delivers up to 60W per channel at 4 Ohms and has two optical inputs, two digital coaxial inputs, a dedicated phono input with MM/MC capability, and five stereo RCA inputs. The A-9150 features an integrated DAC and a front-panel 1/4 headphone jack. Designed for Enhanced Power Amplification In order to deliver a clear and comfortable audio image, sounds of different frequencies should arrive at the listening position simultaneously. The power amplification circuits in the A-9150 feature topology thats designed for phase accuracy, wide-spectrum signal reproduction, and natural transient response. Enhanced Musicality with Discrete SpectraModule The discrete SpectraModule features a slew rate of over 500 V/?s to help produce accurate definition of instruments ranged around a larger and more realistic soundstage. Dedicated MM/MC Phono Circuit Board The A-9150 features a gold-plated phono input that supports signals from either MM or MC cartridges fitted to your choice of turntable. Its separate phono circuit board has dedicated equalizers served by a customized head amp, which operates in discrete configuration for MC signals. Together with analog power amplification, this phono input design helps express the depth and vitality of music on vinyl. High-Current Transformer and Capacitors Current influences sound quality; high current is required for a better grip on the speaker transducers, improving control and accuracy. A high-output transformer and two capacitors inside the A-9150 deliver current through discrete output-stage transistors that are kept cool by an aluminum heat sink. This allows the speakers to react nearly instantly, with throw-range controlled for accurate articulation, even through dynamic and complex musical passages. DIDRC Filter and 768 kHz / 32-Bit DAC for Natural Sound Distortion in the ultra-high-frequency spectrum can have a noticeable impact on the character of audible sound. The DIDRC Filter is designed to completely erase ultra-high-frequency noise. Performance is optimized for digital music with an undistorted frequency response extending above the range of audibility. Combined with a 768 kHz / 32-bit DAC, you can enjoy an enhanced sense of realism from digital sources, with none of the unnatural synthesized feeling sometimes produced by digital processing. Designed for Enhanced Quality with Reduced Resonance Held in place by a flat chassis designed to tame resonance, the digital audio board is isolated from the analog circuitry. The L/R channels are symmetrical to equalize signal path-lengths and minimize stereo playback errors. The coaxial digital inputs, phono input, speaker posts, and RCA line inputs are gold-plated to prevent corrosion and improve connectivity. The A-9150 is finished off with an aluminum front panel and volume control. Additional Features High-current, low-impedance drive 192 kHz / 24-bit HD audio playback via digital coaxial input Direct switch that bypasses tone controls for purest possible sound Pre-Out/Main-In jacks on rear Bass, treble, balance control AKM AK4452 768 kHz / 32-bit digital-to-analog converter REFINED POWER AMPLIFICATION In order to deliver a clear and comfortable audio image, its vital that sounds of different frequencies arrive at the listening position simultaneously. Power amplification circuits feature original topology thats carefully tuned for phase accuracy, wide-spectrum signal reproduction, and natural transient response. Fitted with hand-selected audio-grade parts, the amplifier contributes to lifelike and involving sound quality. NUANCED MUSICALITY DELIVERED WITH DISCRETE SPECTRAMODULE™ Discrete SpectraModule boasts a slew rate of over 500 V/?s, significantly higher than competitive products that use a standard IC chip. High-voltage performance enables flat linearity into the megahertz range for full-bandwidth signal reproduction. This is important not only for natural transients expressing the nuances in music with freshness and vitality, but also for accurate definition of instruments ranged around a larger and more realistic soundstage. DEDICATED MM/MC PHONO CIRCUIT BOARD The A-9150 makes your records sound better than ever. A gold-plated phono input supports signals from either MM or MC cartridges fitted to your choice of turntable. Separate phono circuit board has dedicated equalizers served by a top-quality customized head amp, which operates in discrete configuration for MC signals. Together with analog power amplification, this high-grade phono input design expresses the depth and vitality of music on vinyl. CUSTOMIZED HIGH-CURRENT TRANSFORMER AND CUSTOM AUDIO-GRADE CAPACITORS Current has great influence on sound quality. High current is required for a better grip on the speaker transducers, improving control and accuracy. A customized high-output transformer and two huge custom capacitors inside the A-9150 deliver current through discrete output-stage transistors that are kept cool by an aluminum heat sink. Speakers react instantly, with throw-range precisely controlled for accurate articulation even through dynamic and complex musical passages.

Used about two months in perfect working and physical condition

Used about two months in perfect working and physical condition

Lightly used Topping A90 Discrete Headphone Amp. Comes with original packaging and remote. Full working condition (no blemishes or defects)

2x Burson V5 Discrete Opamp V5-OPA-D, dual ca. 2 Jahre im Einsatz in meinem DAC gewesen, funktionieren astrein. Kompatibilität: Dual OPA Type 5532 wie z.B.: (ohne Gewähr!) AD823, AD823AN, AD8066, AD8620, AD712, AD827, C4570, JRC4556AD, JRC4580, JRC5532, JRC5532D, JRC5534, LF353, LM4562, LME49860, LM833N, MUSES8920, NE5532, NEC4520, NEC4570, NJM2068D, NJM2114, NJM2214D, NJM4558, NJM4558D, NJM4560, NJM5532, NJM4558P, OP275, OPA1612, OPA2277PA, OPA2132, OPA2134, OPA2604, JRC4558, RC4558D, RC4558P, TL052, TL072, MUSES01, MUSES02, MUSES8820, MUSES8920, MUSES8832. Der Verkauf erfolgt von privat unter Ausschluss jeglicher Sachmängelhaftung.

Topping A90 (A90D) Discrete Desktop Headphone Amplifier with Box This Amplifier is very clean and is in excellent condition. It has some minor scuffs along one edge, but its nothing major. Includes box, foam and power cord. Please see all photos. If you have any issue with the item you receive, I politely ask that you message me Before Leaving FeedBack so we can resolve it. We can resolve most any problem easily. Additional charges will apply to PR, AK & HI.Sales Tax will be charged by eBay in accordance with your State Laws. If it is not pictured or described, please do not assume it is included; because it likely will not be. Due to the high volume of non-payers; report will be filed after 5 days of non-payment.The item(s) in the picture(s) is/are exactly the item(s) you will be receiving.

TOPPING A90 Discrete Voll Ausgewogen Kopfhörer Verstärker Nfca Module Amp Vor Das Datenblatt dieses Produkts wurde ursprünglich auf Englisch verfasst. Unten finden Sie eine automatische Übersetzung ins Deutsche. Sollten Sie irgendwelche Fragen haben, kontaktieren Sie uns.   Topping A90 Diskreter, vollsymmetrischer Kopfhörerverstärker, NFCA-Module, Vorverstärker  Beschreibung Topping A90 Diskreter, vollsymmetrischer Kopfhörerverstärker, NFCA-Module, VorverstärkerWenn Sie Fragen haben, können Sie mich gerne kontaktieren.Bitte überprüfen Sie den Zustand des Produkts anhand des Fotos.Alle Artikel sind im Bild.?Hinweis nur für eingeschaltete Produkte. Produkte, die sich nicht einschalten lassen, sind nicht berechtigt.?  Die Stromversorgung für dieses Produkt ist AC100V 50/60Hz.In einigen Ländern ist möglicherweise ein Transformator erforderlich.Bitte bereiten Sie den Transformator kaufseitig vor. Steckdosenspezifikationen ?A-TypWenn es sich vom A-Typ unterscheidet, ist ein Konverter erforderlich.     Sie in anderen Bereichen als 100 V.Wenn Sie den von mir verkauften Transformator verwenden, können Sie ihn in anderen Bereichen als 100 V verwenden.eBay.comhttps://www.ebay.com/itm/373547463184eBay.ukhttps://www.ebay.com/itm/373547520813eBay.euhttps://www.ebay.com/itm/373547520926eBay.auhttps://www.ebay.com/itm/373547520958Wir verkaufen auch außerhalb von eBay.com.Bitte kontaktieren Sie uns, wenn Sie einen Kauf tätigen möchten.Wenn Sie weitere Fragen haben, kontaktieren Sie mich bitte.* In einigen Gebieten ist dies möglicherweise nicht möglichBitte überlegen Sie sorgfältig.In meinem Geschäft überprüfe ich die Artikel, die vor dem Versand überprüft werden müssen. Ich mache ein Video der Bestätigung des Vorgangs. Sie können das Video auf YouTube ansehen. Dieser Service gibt Käufern Sicherheit.Zahlung ??Bitte zahlen Sie innerhalb ??3 Tage nach Auktionsende. Versand Versand per Express-EMS, DHL oder FedExWir liefern mit der schnellsten Versandart.Versand mit Schadens-/VerlustversicherungMit Sendungsverfolgungsnummer??(10-15 Tage in die USA) ??(10-30 Tage oder mehr in andere Länder) Verkaufsbedingungen ??[Über zurückgegebene Waren]????Rücksendungen werden nur akzeptiert, wenn der Artikel im Originalzustand war?   nicht der in der Auktion beschriebene Artikel.            [Zurückkehren]       Rücksendungen aus persönlichen Gründen werden nicht akzeptiert.    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 oder Kaufen beim Zollamt Ihres Landes, wie hoch diese zusätzlichen Kosten sein werden.  Bereitgestellt von HARUTopping A90 Diskreter, vollsymmetrischer Kopfhörerverstärker, NFCA-Module, VorverstärkerWenn Sie Fragen haben, können Sie mich gerne kontaktieren.Bitte überprüfen Sie den Zustand des Produkts anhand des Fotos.Alle Artikel sind im Bild.?Hinweis nur für eingeschaltete Produkte. Produkte, die sich nicht einschalten lassen, sind nicht berechtigt.?  Die Stromversorgung für dieses Produkt ist AC100V 50/60Hz.In einigen Ländern ist möglicherweise ein Transformator erforderlich.Bitte bereiten Sie den Transformator kaufseitig vor. Steckdosenspezifikationen ?A-TypWenn es sich vom A-Typ unterscheidet, ist ein Konverter erforderlich.     Sie in anderen Bereichen als 100 V.Wenn Sie den von mir verkauften Transformator verwenden, können Sie ihn in anderen Bereichen als 100 V verwenden.eBay.comhttps://www MPN Does not apply Brand TOPPING Audio Outputs RCA, XLR Model A90 Discrete Type AMP Number of Outputs 2 UPC Does not apply

Topping A90 Discrete Fully Balanced Headphone Amplifier NFCA modules Pre Amp Description Topping A90 Discrete Fully Balanced Headphone Amplifier NFCA modules Pre Amp If you have any questions, please feel free to contact me.Please check the condition of the product in the photo.All items are in the picture.?Note only for products that are turned on.?????????????Products that do not turn on are not eligible? The power supply for this product is AC100V 50/60Hz.A transformer may be required in some countries.Please prepare the transformer on the purchase side. Outlet specifications??A typeIf it is different from A type, a converter is required. You in areas other than 100V.If you use the transformer I sell, you can use it in areas other than 100V.ebay.comhttp://www.ebay.com/itm/373547463184ebay.ukhttps://www.ebay.com/itm/373547520813 ebay.euhttps://www.ebay.com/itm/373547520926ebay.auhttps://www.ebay.com/itm/373547520958We also sell other than ebay.com.Please contact us if you would like to purchase.If you have any other questions, please contact me.* It may not be possible in some areasPlease consider carefully.At my shop, I will check the items that need to be checked before shipping.I will take a video of the operation confirmation.You can check the video on YouTube.This service gives buyers peace of mind.Payment ??Please payment within ??3 days after the auction closed. Shipping Ship by express EMS?or DHL or FedExWe will deliver by the fastest delivery method. Shipment with damage / loss insuranceWith tracking number ??(10-15 days to US) ??(10-30days or more to Other countries) Terms of Sale ??[About returned goods]????Returns are accepted only if the item was ? not the item described in the aution. [Return] Returned goods for personal reasons will not be accepted. 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. Provided by HARU

The Topping A90D has been called the “The Best Amp Ever.” It has also been the best selling amp for several online retailers. At its most basic level, it’s a balanced amp and pre-amp with tremendously clean and powerful output. At its broadest level, it’s become the benchmark by which all other solid state amplifiers below $1,000 are judged. The A90 Discrete, or A90D, is an upgraded version of the groundbreaking A90. Besides featuring fully discrete NFCA modules, the A90D features a number of quality-of-life improvements that are lacking in the previous A90. These include an R2R volume relay, a remote control, a ground loop noise terminator switch, a 12V trigger interface, a redesigned UI, volume memorization, and more. The A90D can handle all types of headphones thanks to its high output voltage, high output current and low output impedance. The A90D can push loads of power into high-impedance full-sized headphones or pare that power back in order to drive sensitive IEMs.

The worlds largest online retailer of pre-owned audio Product DescriptionWho we areWhat we doOur ProcessOur Policies Topping A90 Discrete Headphone Amplifier Product SKU: 69113 # of Owners: Unknown Service History: None Age: Unknown Tobacco Exposure: No MSRP: $599 Cosmetic Description: Very good condition with minimal visible cosmetic wear including a small scuff on the top surface. This item looks like new from jsut a few feet away - youll have to examine very closely to see any signs of wear. What is Included: Headphone Amplifier, Remote, Manual, Power Cable, Factory Packaging Other Notes: If there is a definition of a daily driver amp that works impressively well with movies, games and music, driving a wall of headphones starting from IEMs, portable over-ears, desktop dynamic and planar-magnetic headphones, then that’s surely the newest Topping A90D! If I’m overlooking a few quibbles that I experienced with IEMs via its single-ended headphone jack (which I’m sure will be solved with a future firmware update), then honestly, I have nothing else to complain about the A90D. Everything that I wanted A90 to be, was embodied in the A90D. - Sandu Vitalie, SoundNews.net Functional Notes: Operational condition of this item is excellent, fully tested and no issues found. Shipping: Cost to ship this item within the contiguous United States is a flat rate of $19.00- including packaging and insurance. For all other locations including Hawaii, Puerto Rico and Alaska, please request a quote prior to purchase. Items with factory packaging will be double boxed. When factory packaging not available re-usable shipping box with custom injected-foam mold will be used. (for all items over 10 lbs). Note that all items valued over $750 will require a signature upon delivery. Your online source for the best value in new and used audio gear. Visit us online to Buy / Sell / Trade / Consign The Music Room is the largest online retailer of pre-owned HiFi equipment in the world. Headquartered in beautiful Boulder Colorado, The Music Room is a team of 17 strong (and growing) music lovers - all dedicated to one singular mission: delivering the very best online shopping experience in the audio industry - period. We specialize in well-cared for, previously used gear because that is what we are passionate about. We feel that there is nothing more fulfilling than creating a high-performance system on a budget with carefully selected used components, speakers and cables. Our program is safe, secure, fast, fair, hassle-free and highly effective. Visit us online to Buy / Sell / Trade / Consign Buy: Are you looking to get a fair price for your used home audio equipment without all the hassles, headaches, risks and fees? We will appraise your equipment and make you a quick, easy, fair cash offer. Just fill out our “get a quote” form on our homepage to start the process. Sell: We sell in multiple online venues with many (but not all) of our products available in our eBay store. Everything is quality-assured and backed by our best-in-class, satisfaction-guaranteed return policy. Trade: Make your budget go further with a generous trade-in allowance. Let us know what you have available, and we’ll get you the best possible trade-in allowance. We can even assist with shipping & logistics from anywhere in the USA. Just fill out our “get a quote” form on our homepage to start the process. Consign: We offer a hassle-free way for individuals and businesses to liquidate used gear. We’ll handle every step of the process from shipping to appraisals, customer service, fulfillment, and returns: Industry-low rates with no hidden fees Leverage our world-class reputation and get exposure in multiple sales venues - putting your product in front of over 570k monthly shoppers. Our program is Safe, Secure, Fast, Fair, Hassle-Free and Highly Effective. With 100% feedback ratings in every venue in which we sell, you can rest assured that we’ve got your back. Visit us online to Buy / Sell / Trade / Consign Quality Assurance: We offer 15-20 new product listings for sale daily. Each product undergoes an extremely rigorous quality-assurance and listening session by one of our qualified technicians. We understand that buying used audio equipment can be rife with uncertainty and unexpected headaches. Our quality assurance program is informed by a knowledge-base built through delivering over 30,000 used audio products to satisfied customers. We promise to deliver your product in good working order - exactly as described 100% of the time. Support: We don’t just make promises. We stand behind them - your satisfaction is guaranteed. Our support team is ready to help you with any questions you might have before and after the sale. Value: In the never-ending pursuit of high performance, it’s important to stretch your limited budget as far as possible. Used equipment sells for a fraction of new prices, and with a partner like The Music Room you can upgrade any time you like and get most of your money back. There’s simply no better way to maximize a limited audio budget. Packaging: We’ve invested thousands of dollars and countless hours into mastering our state-of-the-art packaging process. Our custom foam-in-place packaging system allows us to safely package almost any item regardless of irregular shapes or sizes. Most importantly, this system provides our customers with a re-usable shipping box which increases the resale value of the product and provides a shipping method for easy, secure returns. Be seen by over 70,000 monthly visitors. Visit us online to Buy / Sell / Trade / Consign Payment: Prompt payment is expected. Paypal is preferred but all forms of payment are accepted. Unpaid item case will be opened after 3 days if no payment received. Shipping Times: Most Domestic orders ship within 1 business day of purchase. For International orders or freight shipments, please allow 2-3 business days. In all cases, tracking information will be emailed to you at the moment the shipping label is created. If you cant find it or have other questions about shipping & logistics, please contact us. Shipping Costs: Flat rate shipping costs are applicable within the contiguous 48 States (USA). These rates are clearly posted on each product page. For an International or custom quote (including Hawaii, PR, AK) please contact us. Returns: Every purchase made on eBay carries a 30-day, satisfaction-guaranteed return policy. If youre not happy with your purchase for any reason or if youve simply changed your mind... no problem. Simply ship it back for a full refund or exchange (minus S&H costs). If you have received an item that is defective in some way, we will make it right. Let us know - we will pay for return shipping and repair the item or refund 100% of your original purchase price.

Topping A90D Discrete headphone amplifier works perfect with balance of 10 months Hificollege warranty. Includes the RC-16 remote (the jog wheel on the front also has all the functions and settings). Very tiny nick on the front (see zoomed in photo) as they didnt bag the 6.35mm adapter properly. Just flashed the current 2.8 firmware so its up to date. Improvements over the original A90 are:Digital volume control for perfect channel matchingMore power, and supports 5 volt output DACs for best performanceDisplay has auto off to go black after 30 seconds (or option to stay on)Independent volume memory for all three headphone connectors12v trigger to turn on/off multiple componentsGround/Lift mode to eliminate ground loops (best performance in default ground mode)Firmware update USB C port for easy updates We ship to all countries supported by the eBay international shipping program. See our about page for details and 10 percent discount offers. Visit our store, we specialize in audio equipment and have new listings several times each week. Select save seller to see updates when they appear.

Packing an ultimate performance with fully-discrete NFCA modules, the all-new Topping A90 Discrete headphone amplifier is here. Topping has used fully discrete components to redesign its famous NFCA(Nested Feedback Composite Amplifier) module. The A90 Discrete has got four built-in NFCA discrete modules, each of them featuring 39 transistors building up a fully balanced structure. With this discrete component circuitry, the A90 Discrete packs a tremendously powerful output producing about 9800mW of clean, noise-free output ratings at 16? of load. Topping A90 Discrete works flawlessly with EXT90 extender adding three XLR connections and one RCA connection. Topping A90 Discrete is designed to be there with high-end desktop chains!!

Packing an ultimate performance with fully-discrete NFCA modules, the all-new Topping A90 Discrete headphone amplifier is here. Topping has used fully discrete components to redesign its famous NFCA(Nested Feedback Composite Amplifier) module. The A90 Discrete has got four built-in NFCA discrete modules, each of them featuring 39 transistors building up a fully balanced structure. With this discrete component circuitry, the A90 Discrete packs a tremendously powerful output producing about 9800mW of clean, noise-free output ratings at 16? of load. Topping A90 Discrete works flawlessly with EXT90 extender adding three XLR connections and one RCA connection. Topping A90 Discrete is designed to be there with high-end desktop chains!!

Lightly used.It works well without any problems.We will deliver the product as shown in the photo.Please check the appearance.The original box is not included, but we will deliver it safely through careful packing. Experience unparalleled audio fidelity with this Topping A90D Discrete Amplifier, now available in a near mint condition. Despite the absence of the original packaging, this amplifier has been meticulously maintained and shows minimal signs of use.Key Features:High-Power Output: Delivers robust power across various impedances, ensuring your headphones and speakers always perform at their best.Pristine Sound Quality: Designed to reduce distortion to almost negligible levels, offering a clean and detailed sound that audiophiles and professional musicians appreciate.Versatile Connectivity: Features balanced XLR and single-ended outputs, making it compatible with a wide range of audio equipment.Ideal for serious audio enthusiasts seeking a powerful and crystal-clear listening experience. Dont miss out on elevating your audio setup with this premium amplifier.Buy now and indulge in the superior sound quality that only the Topping A90D can provide!

2 Fosi Audio ZA3 48V Power Supply Sparkos SS3602 Dual Discrete Op Amps set up as Monoblock amps. Will only work as balanced monoblock unless you put the original op amps back in. Sounds awesome with op amp upgrade., $160. Will include original op amps

Topping A90D Discrete headphone amplifier in excellent condition and completely tested. Includes the RC-16 remote, power cable, and upgraded 6.35mm adapter, and new batteries.Firmware is the latest 2.8 and just sounds amazing with complete transparency. These will power the Hifiman HE6SE easily on the balanced side (we currently have one, so I can tell you with certainty). Also on the single end side the Beyerdynamic 600ohm DT990 we have was easily powered. Improvements over the original A90 are:Digital volume control for perfect channel matchingMore power, and supports 5 volt output DACs for best performanceDisplay has auto off to go black after 30 seconds (or option to stay on)Independent volume memory for all three headphone connectors12v trigger to turn on/off multiple componentsGround/Lift mode to eliminate ground loops (best performance in default ground mode)Firmware update USB C port for easy updates We ship to all countries supported by the eBay international shipping program. See our about page for details and 10 percent discount offers. Visit our store, we specialize in audio equipment and have new listings several times each week. Select save seller to see updates when they appear.

Topping A90D Discrete headphone amplifier in excellent condition and completely tested. Includes the RC-16 remote, power cable, and upgraded 6.35mm adapter. Balance of warranty with Aoshida U.S. registered. Firmware is the latest 2.8 and just sounds amazing with complete transparency. Improvements over the original A90 are:Digital volume control for perfect channel matchingMore power, and supports 5 volt output DACs for best performanceDisplay has auto off to go black after 30 seconds (or option to stay on)Independent volume memory for all three headphone connectors12v trigger to turn on/off multiple componentsGround/Lift mode to eliminate ground loops (best performance in default ground mode)Firmware update USB C port for easy updates We ship to all countries supported by the eBay international shipping program. See our about page for details and 10 percent discount offers. Visit our store, we specialize in audio equipment and have new listings several times each week. Select save seller to see updates when they appear.

(pc)Topping LA90 Discrete NFCA Power Amplifier Black120Wx2 High Power Amp3 x XLR/TRS InputsSelectable Stereo/Mono ModeVol/Bypass ModeUse with D90SE A90 Discrete Pre90 includes Unit and Power Supply in their original boxesbut does not included outer packaging boxMay or may not have actually been used.Cosmetically it looks great. Please be sure to zoom-in on photos for more details...if you need to know anything else, just ask! Thanks for looking at this listing!Payment and Shipping Info:Payment can be made through PayPal or Cash upon Pickup.International Buyers: If you dont see a shipping price for your country please ask before purchasing. I may be able to add shipping options for you, but some items I do not ship internationally. Also, you are responsible for import/customs/duty fees incurred. I almost always ship within 1 business day! Free Tracking on all US orders.Im happy to combine shipping when possible. When purchasing more than one item just wait for an invoice that will reflect combined shipping savings. If youd like a quote ahead of time feel free to contact me.Additional Info:Your satisfaction is extremely important to me. Once you receive your item/s and are happy with them I hope you will consider leaving me positive feedback, as I will be doing the same for you.If you are not satisfied with your item please contact me immediately to arrange for a return/refund.Thank you for your interest, and please dont hesitate to contact me with any questions!

This Topping A90D Discrete Balanced Headphone Amplifier in Silver is a fantastic addition to any home audio setup. It has a number of impressive features, including stereo L/R RCA and XLR audio inputs, and audio outputs in RCA, headphone jack, and XLR. With two channels and two inputs, this headphone amplifier is perfect for anyone who wants to enjoy high-quality audio. The Topping A90D is a reliable and efficient headphone amplifier that provides a great sound experience. It is perfect for music enthusiasts who want to enjoy their favorite tunes in a high-quality audio format. This amplifier is also great for those who want to listen to music without any distractions or interference.

Topping A90D Uses Fully Discrete Components To Redesign The Nfca (Nested Feedback Composite Amplifier) Module. 4 Built-In Nfca-Discrete Modules Which Each Them Uses 39 Transistors Build Up Fully Balanced Structure. The Optimized Voltage Current Hybrid Feedback Architecture Along With Uhgf (Ultra High Gain Feedback) Technology Provide Excellent Dc And Ac Performance. With 9 watts per channel the A90d can handle any headphones easily. The 0.2Uvrms Ultra-Low Noise, Even Sensitive Lems Will Not Suffer From Any Noise. Also A Preamp When It Is In Preamp Mode, You Can Get The Same High Performance As The Headphone Amp Mode, And The 20Ohm Se And 40Ohm Balanced Output Impedance Are Widely Suitable For Various Power Amplifiers. A90 Discrete Can Not Only Switch Between The Headphone Amp (Only Output From The Headphone Jack) And The Preamp(Only Output From Rca And Xlr), But Also Support The Output From All At The Same Time.