Up for auction today is a N.E.W. 20 watt x2 class A amp. This amp is extremely rare and sounds amazing. This was designed by Nelson Pass of Pass Labs and built by Ted Bennett of Threshold in Los Angeles CA. The amp was recapped two years ago and is working perfectly. My Uncle was the original owner and he had a pair of these running mono to a set of Klipschhorns for about 30 years. My Uncle is getting to old and doesnt hears as good as he used to so he asked if I could sell some of his system. He will not let go of the other amp. He paid $5000 for the pair of amps back in 2000. This is an amazing peace of audio history, design, and listening pleasure. You will never see another one of these amps up for sale again so get it while you can. This amp is sold as is no warranty or returns. The amp has been fully tested and is in perfect working condition. Amp comes from a smoke and pet free home. Free shipping is to the lower 48 only. Please arrange your own shipping if you are outside the USA. Please look over the pictures this is the item you are bidding on. Thank you and happy bidding.

This has been a workhorse for me for 20 years. The volume control needs servicing it is making scratching noises when adjusting but once set at a volume it works. So if you are a hands on hobbyist or know a good service tech this could be a great find for you and your classic audio system. Designed by legendary Nelson Pass this was an under the radar audiophile favorite back in the day.

Also for sale on US Audio Mart, potentially for a lower price, so this listing is subject to prior sale. Nelson Pass designed Adcom GFA-5400 stereo MOSFET power amplifier in excellent operating and physical condition. Would be hard to find a nicer example of this amp.Original, unmodified, and clean inside and out. Small scratch on top edge of faceplate as shown in photo #12, not very noticeable. Otherwise near mint.Originally $725, hard to find a better amp today for $325. Will ship for a flat $55 via insured FedEx Ground anywhere in the CONUS.

Up for auction today is a N.E.W. 20 watt x2 class A amp. This amp is extremely rare and sounds amazing. This was designed by Nelson Pass of Pass Labs and built by Ted Bennett of Threshold in Los Angeles CA. The amp was recapped two years ago and is working perfectly. My Uncle was the original owner and he had a pair of these running mono to a set of Klipschhorns for about 30 years. My Uncle is getting to old and doesnt hears as good as he used to so he asked if I could sell some of his system. He will not let go of the other amp. He paid $5000 for the pair of amps back in 2000. This is an amazing peace of audio history, design, and listening pleasure. You will never see another one of these amps up for sale again so get it while you can. This amp is sold as is no warranty or returns. The amp has been fully tested and is in perfect working condition. Amp comes from a smoke and pet free home. Free shipping is to the lower 48 only. Please arrange your own shipping if you are outside the USA. Please look over the pictures this is the item you are bidding on. Thank you and happy bidding.

Up for auction today is a N.E.W. 20 watt x2 class A amp. This amp is extremely rare and sounds amazing. This was designed by Nelson Pass of Pass Labs and built by Ted Bennett of Threshold in Los Angeles CA. The amp was recapped two years ago and is working perfectly. My Uncle was the original owner and he had a pair of these running mono to a set of Klipschhorns for about 30 years. My Uncle is getting to old and doesnt hears as good as he used to so he asked if I could sell some of his system. He will not let go of the other amp. He paid $5000 for the pair of amps back in 2000. This is an amazing peace of audio history, design, and listening pleasure. You will never see another one of these amps up for sale again so get it while you can. This amp is sold as is no warranty or returns. The amp has been fully tested and is in perfect working condition. Amp comes from a smoke and pet free home. Free shipping is to the lower 48 only. Please arrange your own shipping if you are outside the USA. Please look over the pictures this is the item you are bidding on. Thank you and happy bidding.

Up for auction today is a N.E.W. 20 watt x2 class A amp. This amp is extremely rare and sounds amazing. This was designed by Nelson Pass of Pass Labs and built by Ted Bennett of Threshold in Los Angeles CA. The amp was recapped two years ago and is working perfectly. My Uncle was the original owner and he had a pair of these running mono to a set of Klipschhorns for about 30 years. My Uncle is getting to old and doesnt hears as good as he used to so he asked if I could sell some of his system. He will not let go of the other amp. He paid $5000 for the pair of amps back in 2000. This is an amazing peace of audio history, design, and listening pleasure. You will never see another one of these amps up for sale again so get it while you can. This amp is sold as is no warranty or returns. The amp has been fully tested and is in perfect working condition. Amp comes from a smoke and pet free home. Free shipping is to the lower 48 only. Please arrange your own shipping if you are outside the USA. Please look over the pictures this is the item you are bidding on. Thank you and happy bidding.

I wanted to dip my toes into the waters of low watt, but high quality audiophile amplifiers, and there is no one with more accolades in that market than Nelson Pass. Though his main company Pass Labs produces very expensive, high output amplifiers, his off shoot company FirstWatt focuses on low wattage, high quality, amplification. He is famously quoted saying The first watt is the most important watt. To encourage audiophiles to explore this idea, he created The Amp Camp Amp for a special event called Amp Camp in which 20 people built their very first amplifier from start to finish in one afternoon. The event was held outdoors on a lovely sunny day in California and all attendees walked away with a fully functioning amplifier and a smile on their dials. Though I wasnt present for this event, his directions and components have been posted online so anyone with decent electrical knowledge can build their own Amp Camp Amp at home. I built this particular amp, using the best parts available and supplied by DIY Audio in their Amp Camp Amp Kit. This kit retails for $359 and requires several hours of soldering and building to complete and is currently backordered in black. I have used this amp with several pairs of speakers from Klipsch, KEF (LS50), and several DIY speakers that I have built over the years. In every scenario the amp performed phenomenally. Steve Guttenberg of Audiophiliac fame compared this amp agains Schiits Aegis (a Stereophile A ranked amplifier) and found it held its own (https://www.youtube.com/watch?v=XPD0-QXj9kg). I am only selling this amp because I recently restored an old tub amp that has replaced the ACA in my office system. If you have any questions, please dont hesitate to ask. Thanks for looking.

Up for auction today is a N.E.W. 20 watt x2 class A amp. This amp is extremely rare and sounds amazing. This was designed by Nelson Pass of Pass Labs and built by Ted Bennett of Threshold in Los Angeles CA. The amp was recapped two years ago and is working perfectly. My Uncle was the original owner and he had a pair of these running mono to a set of Klipschhorns for about 30 years. My Uncle is getting to old and doesnt hears as good as he used to so he asked if I could sell some of his system. He will not let go of the other amp. He paid $5000 for the pair of amps back in 2000. This is an amazing peace of audio history, design, and listening pleasure. You will never see another one of these amps up for sale again so get it while you can. This amp is sold as is no warranty or returns. The amp has been fully tested and is in perfect working condition. Amp comes from a smoke and pet free home. Free shipping is to the lower 48 only. Please arrange your own shipping if you are outside the USA. Please look over the pictures this is the item you are bidding on. Thank you and happy bidding.

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.>

Up for auction today is a N.E.W. 20 watt x2 class A amp. This amp is extremely rare and sounds amazing. This was designed by Nelson Pass of Pass Labs and built by Ted Bennett of Threshold in Los Angeles CA. The amp was recapped two years ago and is working perfectly. My Uncle was the original owner and he had a pair of these running mono to a set of Klipschhorns for about 30 years. My Uncle is getting to old and doesnt hears as good as he used to so he asked if I could sell some of his system. He will not let go of the other amp. He paid $5000 for the pair of amps back in 2000. This is an amazing peace of audio history, design, and listening pleasure. You will never see another one of these amps up for sale again so get it while you can. This amp is sold as is no warranty or returns. The amp has been fully tested and is in perfect working condition. Amp comes from a smoke and pet free home. Free shipping is to the lower 48 only. Please arrange your own shipping if you are outside the USA. Please look over the pictures this is the item you are bidding on. Thank you and happy bidding.

Adcom GFA-555 MK I Endstufe zum Verkauf. Technisch top, optisch im guten, wohnzimmertauglichen Zustand (siehe Fotos). Hersteller: AdcomModell: GFA-555Baujahre: 1985-1990Hergestellt in: USAFarbe: schwarz, weißTyp: analog / stereoFernbedienung: neinLeistungsaufnahme: 1000 WAbmessungen: 185 x 432 x 310 mmGewicht: 16KgNeupreis ca.: 1200USD Anschlüsse Anzahl der Eingänge: 1x PreAmpAnzahl der Ausgänge: 1 x Stereo Technische Daten Ausgangsleistung: 200 Watt pro Kanal in 8? (Stereo), 600 Watt in 8? (Mono)Frequenzgang: 10Hz bis 20kHzHarmonische Gesamtverzerrung: 0,09%Dämpfungsfaktor: 800Verstärkung: 27 dBEingangsempfindlichkeit: 1,75VSignal-Rausch-Verhältnis: 110 dB Besondere Ausstattungen Halbleiter: 42 x Transistoren, 2 x Zenerdioden, 13 x Dioden, 2 x IC, 2 x DiodenbrückenNelson Pass-Design Schaltung

Adcom GFP-750 - Audiophile Level Nelson Pass Designed Stereo Preamplifier Bought an Ayre K5xe mp, my system has been so upgraded, it has outgrown this overachieving preamplifier. Class A Stereophile magazine rated. Also comes with programmed aftermarket remote. Used it for volume control, not sure what else it will do as volume is all I need. I unplug my gear when not in use. I will insure the preamp when shipped. Checked the pricing at the big used audio websites and $650 is the best price. Audiogon has no 750s and US Audio Mart has one at $650

Up for auction today is a N.E.W. 20 watt x2 class A amp. This amp is extremely rare and sounds amazing. This was designed by Nelson Pass of Pass Labs and built by Ted Bennett of Threshold in Los Angeles CA. The amp was recapped two years ago and is working perfectly. My Uncle was the original owner and he had a pair of these running mono to a set of Klipschhorns for about 30 years. My Uncle is getting to old and doesnt hears as good as he used to so he asked if I could sell some of his system. He will not let go of the other amp. He paid $5000 for the pair of amps back in 2000. This is an amazing peace of audio history, design, and listening pleasure. You will never see another one of these amps up for sale again so get it while you can. This amp is sold as is no warranty or returns. The amp has been fully tested and is in perfect working condition. Amp comes from a smoke and pet free home. Free shipping is to the lower 48 only. Please arrange your own shipping if you are outside the USA. Please look over the pictures this is the item you are bidding on. Thank you and happy bidding.

Up for auction today is a N.E.W. 20 watt x2 class A amp. This amp is extremely rare and sounds amazing. This was designed by Nelson Pass of Pass Labs and built by Ted Bennett of Threshold in Los Angeles CA. The amp was recapped two years ago and is working perfectly. My Uncle was the original owner and he had a pair of these running mono to a set of Klipschhorns for about 30 years. My Uncle is getting to old and doesnt hears as good as he used to so he asked if I could sell some of his system. He will not let go of the other amp. He paid $5000 for the pair of amps back in 2000. This is an amazing peace of audio history, design, and listening pleasure. You will never see another one of these amps up for sale again so get it while you can. This amp is sold as is no warranty or returns. The amp has been fully tested and is in perfect working condition. Amp comes from a smoke and pet free home. Free shipping is to the lower 48 only. Please arrange your own shipping if you are outside the USA. Please look over the pictures this is the item you are bidding on. Thank you and happy bidding.

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.

Adcom GFA-555 MK I Endstufe zum Verkauf. Technisch top, optisch im guten, wohnzimmertauglichen Zustand (siehe Fotos). Hersteller: AdcomModell: GFA-555Baujahre: 1985-1990Hergestellt in: USAFarbe: schwarz, weißTyp: analog / stereoFernbedienung: neinLeistungsaufnahme: 1000 WAbmessungen: 185 x 432 x 310 mmGewicht: 16KgNeupreis ca.: 1200USD Anschlüsse Anzahl der Eingänge: 1x PreAmpAnzahl der Ausgänge: 1 x Stereo Technische Daten Ausgangsleistung: 200 Watt pro Kanal in 8? (Stereo), 600 Watt in 8? (Mono)Frequenzgang: 10Hz bis 20kHzHarmonische Gesamtverzerrung: 0,09%Dämpfungsfaktor: 800Verstärkung: 27 dBEingangsempfindlichkeit: 1,75VSignal-Rausch-Verhältnis: 110 dB Besondere Ausstattungen Halbleiter: 42 x Transistoren, 2 x Zenerdioden, 13 x Dioden, 2 x IC, 2 x DiodenbrückenNelson Pass-Design Schaltung

I’m am selling my baby! Was barely used, works great without any problems. Sounds awesome like no other amp. I recorded a video, please watch it. There is SO MUCH POWER IN THIS BEAST! It also weighs a ton. Cosmetically, it is in good condition given its age. Please check the pics, pics are part of the description of the cosmetic condition. THE TIP OF THE POWER SWITCH IS BROKEN BUT IT DOES NOT INTERFERE WITH THE POWER ON OFF AND WORKS WITHOUT ANY PROBLEMS AS THERE IS ENOUGH LENGTH LEFT TO OPERATE IT. IT IS ONLY SLIGHTLY SHORTER THAN THE ORIGINAL. I INCLUDED A FEW CLOSE UP PICS AND ALSO RECORDED IT IN MY VIDEO. This beast is going to be professionally boxed in a 200 lbs rated box. Please let me know if you have any questions. Thank you

Wunderbar klingende Vorstufe nach Nelson Pass. ALPS Poti, der AUX Eingang ist kanalgetrennt justierbar über interne Trimmpotis, dadurch sehr flexibel einsetzbar. Neu aufgebaut, lediglich das Gehäuse und der Netztrafo sind älteren Datums. DIY. Kaltgerätebuchse. 220/240 Volt. Ringkerntrafo. Absolut Brumm- und rauschfrei. Gute Machart, siehe Bilder. (Auch Pass ClassA Endstufe Return of Zen da!) ...I will not disappoint you. It sounds marvelous. Really. No Kidding. Even if you didn’t build the Zen amplifier, you owe it to yourself to do this one. Stay tuned... Nelson Pass User Bewertungen: ++++ Imageing, instrumental timbre, voices, detail ++++ Very detailed, huge 3-dimentional soundstage with great sense of space and top notch imaging. Excellent for the price.

This power amplifier is a must-have to start any new audiophile down the path of beautiful class A sound. Crafted by renowned designer Nelson Pass, this dual mono class A amplifier delivers the exceptional sound quality and performance. Love these two -- they started me down the path of low power class A designs paired with high efficiency speakers, which I continue today (with a Pass Firstwatt and Zu Audio). These two ACAs are the 24 volt versions. I will include two XLR cables -- they definitely sound better if you can drive them XLR. Enjoy!

Die überarbeitete Variante des legendären ClassA Single Ended Poweramps Pass (Aleph) Zen. Doppelmono. Neu aufgebaut, nur das Gehäuse und die Netztrafos sind älteren Datums. Nicht hörbarer Lüfter. Minimum 2x10W. Kaltgerätebuchse. 220/240Volt. Absolut rausch- & brummfrei. Gute Machart/DIY. (Passende Pass Vorstufe auch da) User Bewertungen über den Vorgänger Pass Zen: B.D. Audiophile ***** Strength: I suppose it is the best in all areas except power Weakness: You need excellent parts in all of your listening chain ;-) Air is the first thats comes in mind, when you listen to this amp. Feel the air dancing on strings and hear all nuances in Barbara Bonneys wonderful voice. You want bass you will get it. The rhythm rolls through all octaves from the bottom to the top. There is nothing hidden listening to the Zen. B.L. Audiophile This Amp sounds really good!!! The hours and the hardwork put into it paid off. The High-midrange of this amp sound is unbelievable. The Bass is Sloppy, and I mean SLLOPPPY. If your a mosfet lover, you should really try this one. If your a Glasso-phile, well, just throw away those tubes for a week and try some mosfets! Zx Audio Enthusiast ***** WANTED !!! I listen Pass ZEN. I really impressed with that sound. Bill Audio Enthusiast ***** ... the sound! You will be rewarded for your hard work with unbelievable performance

This is for all three Adcom pieces First is the GFP - 565 Preamplifier which was Designed by Walt Jung and is a legendary preamp that is in perfect working condition and the original caps are in perfect working condition with absolutely no static in the controls and Ive owned it for 20 years and it needs nothing and has one of the best phono Preamplifiers Ive ever used Im also including the GFT 555 II tuner which matches the Preamplifier and Power Amplifier. And maybe the most underrated Amplifier Ive ever owned the GFA 535 which is the first generation that was designed by the legendary Nelson Pass . The claimed power is 60 wpc in 8ohms and 100 wpc in 4ohms but my speakers are very hard to drive and my previous Amplifier needed all of its 500wpc to push but miraculously this little amp makes them sound fantastic. Being used there are a couple of nicks but over all they in very good condition

FORTE MODEL 1A - Power Amp (Class A @ 50 w/ch - Fully Modded Nelson Pass Design). Up for sale is my wonderful Forte model 1A power amp rated at 50 w/ch operating in full class A power. Sonically, there isnt another one like it. Even though the stock Forte 1A was a great Nelson Pass design, sonically this unit is head and shoulders above any other Forte 1A out there due to it being fully modded and upgraded, and it works flawlessly. As you can see from the pics it is in great cosmetic condition. All the new parts and components are matched where applicable. Heres the list: * All upgraded boutique capacitors* Mills .47 ohm/3w power resistors* PRP audio resistors @ 1%* Silver Mica capacitors* 5K ohm Bourns Pots* Silver Neotech input wire, Pure Copper Neotech wire, Pure Copper Aura wire, 12 ga. Cryo Pure Copper wire, DH Labs 12 ga Pure Copper wire, HMS Pure Copper wire* New Output Transistors Marched* Pre Drivers matched on each driver board* FRED IXYS Bridge Rectifiers* 4 GE 50000uf/50 volt GE Main Power Caps* 8 Gold Connectors to Fuse Holders* Current Limiter* Transformer Pad* Furutech Copper RCAs* Cardas Pure Copper Binding Posts* Furutech Gold Plated IEC w/14 ga Solid Silver wire* Polished Plates on Main Caps* Power Switch The Mod was performed in 2008 by expert audio tech Randy Young. I gave him Carte Blanche to do all possible upgrades for the best possible sound, and it sounds great with virtually no congestion and a touch of warmth which many class A amps lack. Includes a new Box, Manual, 2 spare FETs and will be well packed. You can purchase with confidence!

Nelson Pass: This is a wonderful creation of Class A assemblage . So good. So real. So clean. Showroom look and sound. Now a collector’s item. XLR and RCA connections. Pass Labs’ corner protection foam in shipping box are excellent . Black with silver faceplate, LED blue operating faceplate light.