Der Audio GD NFB-1 Amp ist ein hervorragender Vorverstärker und Kopfhörerverstärker. Dieses Modell bietet eine exzellente Audioqualität und ist ideal für HiFi-Enthusiasten (im Netz finden sich zahlreiche Berichte, die das unterstreichen)Nun, ich habe mir ein Upgrade von Audio GD gegönnt und mein vorheriger audiophiler Schatz ist jetzt in Musik-Liebhaber-Hände abzugeben. Als privat Verkäufer gewähre ich keine Garantien oder anderweitige Gewährleistungen - verbürge mich aber für sein einwandfreies Funktionieren und seinen sehr guten Zustand.

Hello, I would like to sell my used headphone amplifier. It has TXCO Clock upgrade from factory.Compatibility with drivers on Windows 10. Win 11 not compatible. SHIPPING TO EU ONLY. You can see a review for example here: https://www.head-fi.org/showcase/audio-gd-nfb-15-1.14507/reviewsIt was a great selling device, lots of good reviews, was working great, I have used it with Sennheiser HD600 with great success. Main Features: DAC Chips:2× Wolfson WM8741 USB Interface:VIA VT1731 with asynchronous transfer support Supported Sample Rates:USB: Up to 192 kHz / 24-bitCoaxial Input: Up to 192 kHz / 24-bitOptical Input: Up to 96 kHz / 24-bit Inputs:USBCoaxial S/PDIFOptical S/PDIF Outputs:Headphone outputFixed-level RCA analog outputVariable-level RCA analog output (Preamp function) Headphone Amplifier Output Power:3500 mW @ 25 ?1800 mW @ 50 ?900 mW @ 100 ?300 mW @ 300 ?150 mW @ 600 ? Output Impedance:2 ? (both headphone and DAC outputs) Frequency Response:20 Hz – 20 kHz (-0.2 dB) Signal-to-Noise Ratio (SNR):118 dB Power Consumption:11 W Weight:2 kg

Description Up for auction is a Vintage Audio-GD NFB-10es DAC Headphone Amp Preamp Excellent Used Condition! The unit has been tested and works, and will be shipped in its original box! The auction includes the preamp and the power cord along with the original box - there is no paperwork with this unit! Please see photos! You are bidding on the exact item(s) in the photograph. Always bid according to the photo(s) shown, as thats what you are bidding on. Shipping Now shipping to all US locations and INTERNATIONAL. We strive to use clean recycled packing materials whenever possible. Please note that we have been experiencing delays in shipping times due to high volumes in the U.S. Postal system. We try our best to reduce shipping costs for buyers, so we appreciate your understanding. Authenticity All of our items are guaranteed to be 100% authentic. Weve been on eBay since 2001 and dont plan on going anywhere. Sales Tax Be advised that a number of states are now requiring eBay to collect the appropriate sales tax on all online purchases. If you are a resident in one of these states, you will see this tax automatically included at time of checkout. Note that eBay automatically includes the tax in the total - we cannot remove the tax from your invoice. Payment All payments must be made within four (4) days after the auction has ended. If you are bidding on another item that has not ended please let us know, or a nonpayment case may be opened. Feedback & Communication If you have any questions about the item(s) listed that the description or the pictures dont answer, please send us a message and we will do our best to answer you in a timely manner. We are part time eBay sellers, and we will respond to your questions within one (1) day. Please contact us through the eBay message system before bidding. All sales must be completed on eBay - no exceptions. We strive to ensure every customer is completely satisfied. If youre unhappy with your purchase for whatever reason, please contact us through eBay so we can make it right. Please see our feedback and bid with confidence. We are very easy to work with, and would prefer that you contact us first with any concerns, before leaving neutral or negative feedback. Returns Returns are not accepted unless there was an error in the listing. We include multiple photos and a detailed description so that you may feel comfortable in what youre bidding-on. If there was an error in the listing and youd like to return an item, please contact us through the eBay messaging system and we will send a return label at our expense. A refund will be issued as soon as we receive the item back in its original packaging. Contact us with questions, see our feedback, and bid with confidence!

Audio GD VINTAGE NFB 3 Digital Analog Converter Rare to find this device, wonderful reliable DAC

Audio GD VINTAGE NFB 3 Digital Analog Converter Rare to find this device, wonderful reliable DAC

Product Description Page: http://audio-gd.com/Pro/Headphoneamp/NFB16/NFB16EN.htm Nice little unit that I didnt need after acquiring a few other Audio GD pieces. Requires 230V (European Plug) which is not included but easy to source online. Smoke free home. Bid with confidence!

This Audio GD NFB-12 DAC/Amp is the perfect addition to your home audio system. With its high-quality sound and powerful performance, you'll be able to enjoy your favorite tunes like never before. Designed by the trusted brand Audio GD, this model is a must-have for any music lover. This is a used NFB-12 unit, please see all the photos.

Used N11.28 DAC. Tested working. No power cable included

Audio GD NFB 11.28, preamp, DAC, headphone amp. Used but great condition. All functions work as intended. With aftermarket power cord and feet (the original feet were tiny stick on rubber stick ones that fell off). Will pack with care. Pickup around Knoxville Tn welcome. Thanks for looking!

I am the original Owner. This unit is in excellent condition and was not used very often. Has always sounded pristine quality. Amazing build quality. It is an excellent DAC and can interface with RCA COAX (digital) and/or Optical. It provides RCA outputs and some mini version of what looks like an XLR-type of connector The Audio gd web page that describes the NFB 2 and the NFB 3.1 (differences) is located at:http://www.audio-gd.com/Pro/dac/NFB-2/NFB2EN.htm Operating Instructions: http://www.audio-gd.com/Pro/dac/NFB3-2011/NFB3-384EN_Use.htm The unit is shipped with an AC power cord. No other items included. Fully discrete amp without any OPA , couple caps ,non- feedback analog output stage and non-feedback Class A power supplies .The NFB-3.1 applies 2 groups ofclass A parallel connection PSU supplied for analog output stage, (the analog output stage power supply is very important, so we keep the 2 groups of class A parallel connection PSU here). Another 5 groups of linear PSUs supplied for other parts. The NFB-3.1 applies a toroidal transformer. The NFB-3.1 applies mostly 1% SMD resistors and caps. The NFB-3.1 have digital filter setting by software.Dual WM8741 inside ACSS /RCA output DAC Coaxial/Optical/USB input 24Bit / 96KHz USB input and 24Bit / 192KHz Coaxial/Opitcal support SNR 128DB (Mono)Dynamic Range 128DB (Mono)

Selling this beast of a headphone Amp Dac Pre Amp by Audio GD. This is the NFB 11-28 Jam packed with features. Comes with power cord. May show slight signs wear but presents very wellI. Items other than the Audio GD pictured ARE NOT INCLUDEDDirect from manufacturer. Fully discrete analog stages without any OPA and de-coupling caps in the signal path. Non- feedback ACSS analog amplifiers . Built with 4 pcs 20W (in total 80W) high speed Toshiba output transistors, able to drive most of the headphones out there . Total of 6 groups dedicated power circuits are used to purify the power supply. High-End grade parts built in , ALPS 27 volume pot . CMC pure copper RCA sockets ect. 3 channels digital input : coaxial / Optical / USB DAC output : RCA (User can setting with either variable level as DAC with preamp combo or fixed output level as dedicated DAC ) Headphone output : 6.3MM SE The NFB-11 applies the newest ESS high-end Sabre32 DA chip ES9028 which can support up to 32Bit/384KHz input . To be achieve the best performance of ES9028 , must work in current output mode. in voltage output model, there is -12DB THD+N loss . The standard current model design usually need 3 amps (OPA) , the first amp implements I/V conversion, the ES9028 output current signal to voltage signal . The second amp is responsible for conversion balanced signal ,to single-ended signal and implement the low pass analog filter , then go through the volume control fed to the third amp, (the headphone amp ). Every amp usually have two gain stages built in to the ES9028 chip . Signal must go through total of 6 gain stages and finally arrive at the output stage. The NFB-11 applies Non-feedback ACSS design. The ES9028 feed to the ACSS circuit without any OPAs . The ACSS circuit naturally working in current mode . The ACSS amp only have one current gain stage , the ES9028 output signal only goes through one stage . The shortest signal path can reproduce the best detail and dynamics almost without any sound coloration .It showes the real performance of the ES9028 dac. So our ACSS design is the best combo with ES9028 to achieve the best performance .

Selling this beast of a headphone Amp Dac Pre Amp by Audio GD. This is the NFB 11-28 Jam packed with features. Comes with power cord. May show slight signs wear but presents very wellI. Items other than the Audio GD pictured ARE NOT INCLUDEDDirect from manufacturer. Fully discrete analog stages without any OPA and de-coupling caps in the signal path. Non- feedback ACSS analog amplifiers . Built with 4 pcs 20W (in total 80W) high speed Toshiba output transistors, able to drive most of the headphones out there . Total of 6 groups dedicated power circuits are used to purify the power supply. High-End grade parts built in , ALPS 27 volume pot . CMC pure copper RCA sockets ect. 3 channels digital input : coaxial / Optical / USB DAC output : RCA (User can setting with either variable level as DAC with preamp combo or fixed output level as dedicated DAC ) Headphone output : 6.3MM SE The NFB-11 applies the newest ESS high-end Sabre32 DA chip ES9028 which can support up to 32Bit/384KHz input . To be achieve the best performance of ES9028 , must work in current output mode. in voltage output model, there is -12DB THD+N loss . The standard current model design usually need 3 amps (OPA) , the first amp implements I/V conversion, the ES9028 output current signal to voltage signal . The second amp is responsible for conversion balanced signal ,to single-ended signal and implement the low pass analog filter , then go through the volume control fed to the third amp, (the headphone amp ). Every amp usually have two gain stages built in to the ES9028 chip . Signal must go through total of 6 gain stages and finally arrive at the output stage. The NFB-11 applies Non-feedback ACSS design. The ES9028 feed to the ACSS circuit without any OPAs . The ACSS circuit naturally working in current mode . The ACSS amp only have one current gain stage , the ES9028 output signal only goes through one stage . The shortest signal path can reproduce the best detail and dynamics almost without any sound coloration .It showes the real performance of the ES9028 dac. So our ACSS design is the best combo with ES9028 to achieve the best performance .

Selling this beast of a headphone Amp Dac Pre Amp by Audio GD. This is the NFB 11-28 I won’t accept anything less than 20% off list. Comes with power cord and I can throw in a USB cable. May show slight signs wear but presents very well. Dragon not for sale nor any other equipment possibly shown except the Audio gd NFB 11-28 Direct from manufacturer. Fully discrete analog stages without any OPA and de-coupling caps in the signal path. Non- feedback ACSS analog amplifiers . Built with 4 pcs 20W (in total 80W) high speed Toshiba output transistors, able to drive most of the headphones out there . Total of 6 groups dedicated power circuits are used to purify the power supply. High-End grade parts built in , ALPS 27 volume pot . CMC pure copper RCA sockets ect. 3 channels digital input : coaxial / Optical / USB DAC output : RCA (User can setting with either variable level as DAC with preamp combo or fixed output level as dedicated DAC ) Headphone output : 6.3MM SE The NFB-11 applies the newest ESS high-end Sabre32 DA chip ES9028 which can support up to 32Bit/384KHz input . To be achieve the best performance of ES9028 , must work in current output mode. in voltage output model, there is -12DB THD+N loss . The standard current model design usually need 3 amps (OPA) , the first amp implements I/V conversion, the ES9028 output current signal to voltage signal . The second amp is responsible for conversion balanced signal ,to single-ended signal and implement the low pass analog filter , then go through the volume control fed to the third amp, (the headphone amp ). Every amp usually have two gain stages built in to the ES9028 chip . Signal must go through total of 6 gain stages and finally arrive at the output stage. The NFB-11 applies Non-feedback ACSS design. The ES9028 feed to the ACSS circuit without any OPAs . The ACSS circuit naturally working in current mode . The ACSS amp only have one current gain stage , the ES9028 output signal only goes through one stage . The shortest signal path can reproduce the best detail and dynamics almost without any sound coloration .It showes the real performance of the ES9028 dac. So our ACSS design is the best combo with ES9028 to achieve the best performance .

Audio-gd NFB-12 Headphone AMP/DAC Preamps This item is pre-owned and may show some slight signs of wear due to normal use. This item is in good condition overall. Tested and is 100% fully functional. Please look at the photos to make your own determination of this items condition

Audio-GD NFB-12 DAC/ Headphone Amplifier w/PowerThis item is pre-owned and may show some slight signs of wear due to normal use. This item is in good condition overall. Tested and is 100% fully functional. Please look at the photos to make your own determination of this items condition.

Another great sounding DAC on offer here. Specs were and still are impressive for the time. Highly versatile box featuring a headphone amplifier with DAC and can also act as a preamplifier as well. 3 inputs: Optical, Coaxial RCA and USB. Sounds and looks great! What you see is what you will receive. If you need a power cable, let me know after purchasing and Ill find one to throw in. Will be carefully packaged for safe transit. Lower 48 domestic sale only. No international orders. This is a 120v unit! http://audio-gd.com/Pro/Headphoneamp/NFB11/NFB11EN.htm

Audio-GD NFB-12 DAC/ Headphone Amplifier w/PowerThis item is pre-owned and may show some slight signs of wear due to normal use. This item is in good condition overall. Tested and is 100% fully functional. Please look at the photos to make your own determination of this items condition.

I am the second owner of this device. Bought it from original owner in 2019 and has been my daily driver ever since. The device is in great working condition and overall is well-maintained. Will come with power and USB cable. As shown last couple pictures: 1) Minor scratch on bottom surface not visible during use 2) Barely visible hairline scratches on volume knob - really have to play around with the lighting and angle to catch it Note: requires 1/4” end to connect to DAC/AMP

Audio-GD NFB-12 DAC / Headphone Amplifier w/ Power This item is pre-owned and may show some slight signs of wear due to normal use. This item is in good condition overall. Tested and is 100% fully functional. Please look at the photos to make your own determination of this items condition

Audio-gd NFB-10SE Dac/Amp. This Dac/Preamp/Headphone amp combo unit is in perfect working condition with some minor cosmetic blemishes that do not affect the performance. This particular unit does require 240v input, but that can easily be fixed with a voltage step up converter.NFB means Non-FeedBack. NFB-10SE uses the latest high-end “Dual WM8741” which can support up to 32Bit/192KHz input. Similar to other WM8741 designs, NFB-10SE applies Non-feedback ACSS output stage. The “Dual WM8741” feeds to the ACSS output stage without any Operational Amplifier (OPA) so it can achieve very neutral sound. The ACSS technology is a non-feedback technology made with fully discrete amplifiers. Most people know that the global feedback design offers better specifications in measurements than non-feedback design. However, non-feedback design offers better sound for human ears, which is a drawback of the conventional circuits. But the ACSS technology opens a new era, it offers the least coloration sound which is very neutral with very low distortion and high linearity. It retains the dynamics, details and neutrality but does not sound bright or harsh. The output buffers are also non-feedback. In order to maintain low impedance, we applied a diamond output stage which is quite less colored than most conventional circuits. The analog stage does not use couple cap to avoid coloration. The 32bit/192KHz USB interface outputs an I2S signal to the “Dual WM8741”. NFB-10SE applies the WM8805 as the SPDIF interface; its sound characteristic is the same as the WM8741, which is detailed and smooth and supports up to 192KHz. The WM8805 has quite low jitter (50PS). Output impedance ?2 ohm Output Level ? Headphone output : 19V RMS (balanced , max) Preamp Variable output (balanced) : 10V RMS (max) Preamp Variable output (RCA) : 5V RMS (max) Fixed output (balanced): 5V RMS Fixed output (RCA): 2.5V RMS ACSS? 2MA+2MAHeadphone amp output power level (Only for headphone.) Balanced mode 9950MW / 25 ohm 5950MW / 50 ohm 3300MW / 100 ohm 1150MW / 300 ohm 590MW / 600 ohm ?Headphone amp output power level (Only for headphone.) Single-ended mode ?3300MW / 25 ohm 1650MW / 50 ohm 850MW / 100 ohm 300MW / 300 ohm 150MW / 600 ohmInput Sensitivity 0.5 Vp-p (75 Ohms, Coaxial) 19 dBm (Optical) USB1.1 USB2.0 (Full Speed, Class2) ?Frequency Response 20Hz - 20KHz ?-0.2DB? ? Support Operate Systems (USB) ? 44.1kHz to 192kHz?Support Sampling USB model : 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz Coaxial model: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 192kHz Optical model: 44.1kHz, 48kHz, 88.2kHz, 96kHz ?Power Requirement 220-240V AC 50/60 Hz ?Power Consumption 17W ?Package Weight Approximately 5KG ? Dimensions ?W240 X L360 X H80 mm (Fully aluminum) Accessories AC power cord X1 ?

Audio-GD NFB-12 DAC / Headphone Amplifier w/ Power This item is pre-owned and may show some slight signs of wear due to normal use. This item is in good condition overall. Tested and is 100% fully functional. Please look at the photos to make your own determination of this items condition

I have a replacement fiio dac which does me fine, so selling this - it was a bit of an overkill.in excellent working condition AUDIO-GD NFB-15 .32 with power supply, usb cable to connec to computer and coaxial cable.this device can also be connected via optical which is greati had these set up with my yamaha hs7 summary website: http://www.audio-gd.com/Pro/Headphoneamp/NFB1532/NFB15.32EN.htmSummarize Fully discrete analog stages without any OPA and couple caps in the signal channels. Non- feedback ACSS analog output stage . Total of 6 groups dedicated power circuits are used to purify the power supply. Applies a custom order ALPS 27 volume pot for reducing channel imbalance and improving on sound quality. 3 channels digital input : coaxial / Optical / USB DAC output : RCA (User can setting with either variable level as DAC with preamp combo or fixed output level as dedicated DAC ) Headphone output : 6.3MM SE Supports 2X , 4X and 8X oversampling customers setting High-End grade parts built in , ALPS 27 volume pot , Toshiba optical receiver and transistors , gold plate pure copper RCA sockets ect.

Audio-GD – NFB-11.28 Kopfhörerverstärker mit DAC - DEFEKTSabre ES9028Pro Dac-ChipEingang über USB, coaxial oder optischAusgang über Cinch oder 6,35mm Kopfhörerbuchse (mit ordentlich Leistung auch für hochohmige Kopfhörer!)geliefert wird das Gerät mit Netzstecker Das Gerät wird als DEFEKT angeboten, da es sich seit kurzem einfach abschaltet und dann entweder sofort, nach ein paar Sekunden oder nach leichtem Ruckeln am Netzstecker wieder startet und normal weiterläuft (bis zum nächsten Aussetzer). Ein Wackelkontakt? Für elektronisch versierte Bastler bestimmt interessant!