Available for sale is a HeadAmp GS-X Mini headphone amplifier in excellent condition with minor signs of usage. Works perfectly, simply selling for the sake of temporarily downsizing. The potentiometer is the standard RK27 one, as indicated by the packaging. Will come with the headphone amplifier itself, power cable, and original packaging. If there are any questions, feel free to ask.

Personal unit used for 6 months. Purchased new from HeadAmp in July 2023 and used in my pet free, smoke free office. Works great with no defects. See my feedback and know that I always accurately describe my items and ship fast! Experience high-quality audio with the HeadAmp Gilmore Lite Mk2 headphone amp. This sleek black model features two audio inputs and two outputs, including RCA and headphone jack options. Its Golden Reference Discrete Power Supply provides top-notch performance for music enthusiasts and audiophiles alike. Perfect for amplifying your favorite tunes, this amp complements any home audio system.

Want to try a moving coilcartridge, but only have a phono input? With these two pieces you can! Aclassic matched vintage moving coil cartridge with phono head amplifier. Hereare some quotes from reviews:“The Denon DL-304 audiophile moving coil cartridge providesultimate performance in the most demanding high-end system.” “One of the biggest bargains in phonocartridges, the Denon DL-304 offers the fastidious listener all the virtues ofa truly superlative cartridge, such as sound staging, imaging, transparency,detail, micro dynamics and frequency extension. It lays bare the tonal colorsof different instruments. Rarest of all, the Denon DL-304 makes music comealive! HI-FI CHOICE said - Feb, 1992 Not to mincewords, the DL-304 sounds superb....it is one of the very best handful ofcartridges available today. At the price, its clearly a colossal bargain.” “A professional, high performance stereocartridge, with a micro light cantilever giving a quoted frequency response of20 Hz - 50 Hz. The Gold anodized all alloy body looks stunning, audio loverswill delight with this extra detail that is brought out by this outstandingphono cartridge. The Denon DL-304 moving coil cartridge has extraordinaryresolution with excellent tracking facility even at low tracking force, verypure, natural sound.”The high compliance of this cartridge dictates that it go on a low masstonearm. The cartridge delivers excellent tracing ability with low stylusforce. Optimum force is 1.2 grams.The Denon HA500 phono head amplifier is an obvious choice for theDL-304 cartridge. By design these two excellent pieces of equipment are abeautiful match. It is in excellent condition and comes in original box andpacking. I have carefully opened it up to check the circuit board for anyleaking of capacitors. Everything is very clean inside. No leaking. I thentested it for approximately 5 albums. It operates exactly as it should. Thesound quality is excellent and very quiet. The piece rates a 9 out of 10because it is not ‘new old stock’. Otherwise it is mint.At this point in time this type of vintage gear in this condition isharder to find with availability fewer and farther between. I’ve been an audioenthusiast for over 35 years. I’m always searching the internet for exceptionalvalue and quality gear. I happened to find these two pieces at the same time.The value to you is that they were carefully selected and tested and come as aset. Act quickly as such opportunity will not last.

Introducing the iFi Nano iDSD Black Label Portable USB DAC & Headphone Amp, a sleek and high-performance device that lets you enjoy high-quality audio from your computer or mobile device. With its advanced features such as DSD256, MQA, DXD, and 384 kHz, you can experience your music in exceptional detail and clarity. This device comes in a stylish black color and has a number of inputs and outputs such as USB, HDMI, and Stereo L/R RCA. Its perfect for use at home or on the go and can be easily connected to a variety of audio systems. Get ready to enhance your audio experience with the iFi Nano iDSD Black Label Portable USB DAC & Headphone Amp.

Introducing the iFi Nano iDSD Black Label Portable USB DAC & Headphone Amp, a sleek and high-performance device that lets you enjoy high-quality audio from your computer or mobile device. With its advanced features such as DSD256, MQA, DXD, and 384 kHz, you can experience your music in exceptional detail and clarity. This device comes in a stylish black color and has a number of inputs and outputs such as USB, HDMI, and Stereo L/R RCA. Its perfect for use at home or on the go and can be easily connected to a variety of audio systems. Get ready to enhance your audio experience with the iFi Nano iDSD Black Label Portable USB DAC & Headphone Amp.

This ifi Nano Black Label Dac/Amp has been barley used as Ive only had it for about 3 or 4 months since purchase, its treated me very well and since Ive upgraded I have no need for it now. Will ship as soon as possible. Thank you.

Want to try a moving coilcartridge, but only have a phono input? With these two pieces you can! Aclassic matched vintage moving coil cartridge with phono head amplifier. Hereare some quotes from reviews:“The Denon DL-304 audiophile moving coil cartridge providesultimate performance in the most demanding high-end system.” “One of the biggest bargains in phonocartridges, the Denon DL-304 offers the fastidious listener all the virtues ofa truly superlative cartridge, such as sound staging, imaging, transparency,detail, micro dynamics and frequency extension. It lays bare the tonal colorsof different instruments. Rarest of all, the Denon DL-304 makes music comealive! HI-FI CHOICE said - Feb, 1992 Not to mincewords, the DL-304 sounds superb....it is one of the very best handful ofcartridges available today. At the price, its clearly a colossal bargain.” “A professional, high performance stereocartridge, with a micro light cantilever giving a quoted frequency response of20 Hz - 50 Hz. The Gold anodized all alloy body looks stunning, audio loverswill delight with this extra detail that is brought out by this outstandingphono cartridge. The Denon DL-304 moving coil cartridge has extraordinaryresolution with excellent tracking facility even at low tracking force, verypure, natural sound.”The high compliance of this cartridge dictates that it go on a low masstonearm. The cartridge delivers excellent tracing ability with low stylusforce. Optimum force is 1.2 grams.The Denon HA500 phono head amplifier is an obvious choice for theDL-304 cartridge. By design these two excellent pieces of equipment are abeautiful match. It is in excellent condition and comes in original box andpacking. I have carefully opened it up to check the circuit board for anyleaking of capacitors. Everything is very clean inside. No leaking. I thentested it for approximately 5 albums. It operates exactly as it should. Thesound quality is excellent and very quiet. The piece rates a 9 out of 10because it is not ‘new old stock’. Otherwise it is mint.At this point in time this type of vintage gear in this condition isharder to find with availability fewer and farther between. I’ve been an audioenthusiast for over 35 years. I’m always searching the internet for exceptionalvalue and quality gear. I happened to find these two pieces at the same time.The value to you is that they were carefully selected and tested and come as aset. Act quickly as such opportunity will not last.

Experience high-quality audio with the iFi Nano iDSD Black Label Portable USB DAC & Headphone Amp. This device is perfect for music lovers on-the-go, with its lightweight and compact design. It offers a range of features including DSD256, MQA, DXD, and 384 kHz, and comes in a sleek black color. This portable DAC headamp from iFi Audio has two audio inputs and one output, and is compatible with various devices. The audio outputs include HDMI and stereo L/R RCA, making it easy to connect to your preferred speakers or headphones. Get the most out of your music with the iFi Nano iDSD Black Label, the perfect choice for audiophiles who are always on the move.

Want to try a moving coilcartridge, but only have a phono input? With these two pieces you can! Aclassic matched vintage moving coil cartridge with phono head amplifier. Hereare some quotes from reviews:“The Denon DL-304 audiophile moving coil cartridge providesultimate performance in the most demanding high-end system.” “One of the biggest bargains in phonocartridges, the Denon DL-304 offers the fastidious listener all the virtues ofa truly superlative cartridge, such as sound staging, imaging, transparency,detail, micro dynamics and frequency extension. It lays bare the tonal colorsof different instruments. Rarest of all, the Denon DL-304 makes music comealive! HI-FI CHOICE said - Feb, 1992 Not to mincewords, the DL-304 sounds superb....it is one of the very best handful ofcartridges available today. At the price, its clearly a colossal bargain.” “A professional, high performance stereocartridge, with a micro light cantilever giving a quoted frequency response of20 Hz - 50 Hz. The Gold anodized all alloy body looks stunning, audio loverswill delight with this extra detail that is brought out by this outstandingphono cartridge. The Denon DL-304 moving coil cartridge has extraordinaryresolution with excellent tracking facility even at low tracking force, verypure, natural sound.”The high compliance of this cartridge dictates that it go on a low masstonearm. The cartridge delivers excellent tracing ability with low stylusforce. Optimum force is 1.2 grams.The Denon HA500 phono head amplifier is an obvious choice for theDL-304 cartridge. By design these two excellent pieces of equipment are abeautiful match. It is in excellent condition and comes in original box andpacking. I have carefully opened it up to check the circuit board for anyleaking of capacitors. Everything is very clean inside. No leaking. I thentested it for approximately 5 albums. It operates exactly as it should. Thesound quality is excellent and very quiet. The piece rates a 9 out of 10because it is not ‘new old stock’. Otherwise it is mint.At this point in time this type of vintage gear in this condition isharder to find with availability fewer and farther between. I’ve been an audioenthusiast for over 35 years. I’m always searching the internet for exceptionalvalue and quality gear. I happened to find these two pieces at the same time.The value to you is that they were carefully selected and tested and come as aset. Act quickly as such opportunity will not last.

Available for sale is a HeadAmp GS-X Mini headphone amplifier in excellent condition with minor signs of usage. Works perfectly, simply selling for the sake of temporarily downsizing. Will come with the headphone amplifier itself, power cable, and original packaging. If there are any questions, feel free to ask.

The amp is in good condition! Does not include power supply. Item is as pictured. If you have any questions feel free to ask!

Most home recordings involve from one to four people, any or all of whom are going to need headphone monitoring. The monitor amp would be connected to the tape decks headphone output or a mixer output so that the performers can hear themselves and each other. Of course the same application can apply to band rehearsals and even home entertainment. HeadAmp 4 provides amplification and individual volume control for up to 4 headsets. It can be driven by either line-level or headphone amplifier signals (mono or stereo). The HeadAmp 4 sports a new case design (like USBPhono Plus), more features (added 1/8 I/O) and enhanced electronics. ART HeadAmp 4 Features: Redesigned Case Drives 4 Sets of Headphones from a Single Feed 1/4 and 1/8 Connectors Accepts Mono or Stereo Signals 12V DC power supply Sweetwater is an Authorized ART Dealer Genuine Open Box Item Sweetwaters 2-year warranty ART HeadAmp 4 4-channel Headphone Amplifier 4-channel Headphone Amp with 1/4 and 1/8 I/O Most home recordings involve from one to four people, any or all of whom are going to need headphone monitoring. The monitor amp would be connected to the tape decks headphone output or a mixer output so that the performers can hear themselves and each other. Of course the same application can apply to band rehearsals and even home entertainment. HeadAmp 4 provides amplification and individual volume control for up to 4 headsets. It can be driven by either line-level or headphone amplifier signals (mono or stereo). The HeadAmp 4 sports a new case design (like USBPhono Plus), more features (added 1/8 I/O) and enhanced electronics. ART HeadAmp 4 Features: Redesigned Case Drives 4 Sets of Headphones from a Single Feed 1/4 and 1/8 Connectors Accepts Mono or Stereo Signals 12V DC power supply includedSpecificationDetail Type Headphone Amp Input Channels 1 Output Channels 4 Analog Inputs 1 x 1/4 (TRS), 1 x 1/8 (TRS) Headphones 4 x 1/4, 4 x 1/8 Controls per Channel Volume Form Factor Desktop Height 1.5 Width 4.5 Depth 2.87 Weight 1.3 lbs. RETURN INFORMATION We want you to be completely happy with your purchase from Sweetwater. If you are not satisfied with your product, you may return it for a refund of the purchase price within 30 days. If your purchase was eligible for Free Shipping, the shipping cost will be deducted from your credit or refund. Returns must be in the complete and original packaging with all accessories and complete documentation (Owners Manual, warranty card, quick start guides, etc.), show no signs of wear or use, and include a Return Authorization number or be subject to a restocking fee. Fast, FREE Shipping! Nearly every order received by 3PM Eastern ships the SAME DAY! FREE shipping to lower 48 states. Our central location reaches most states in 1-4 business days 99.95% warehouse accuracy We are proud to provide some of the fastest turnaround times on eBay. We use FedEx or UPS for most items, and USPS for smaller items. Residents of Hawaii, Alaska, and Puerto Rico should contact us for a shipping quote. PLEASE NOTE: We cannot ship large items to PO boxes, please provide an alternate address. If you have questions, feel free to contact us. Buy with confidence! Sweetwaters been selling on eBay since 2001, with 99.9% positive feedback! More than 30 years in business World-class customer service Fast, FREE shipping Free 2-year warranty on nearly every product Free tech support from audio experts

Want to try a moving coilcartridge, but only have a phono input? With these two pieces you can! Aclassic matched vintage moving coil cartridge with phono head amplifier. Hereare some quotes from reviews:“The Denon DL-304 audiophile moving coil cartridge providesultimate performance in the most demanding high-end system.” “One of the biggest bargains in phonocartridges, the Denon DL-304 offers the fastidious listener all the virtues ofa truly superlative cartridge, such as sound staging, imaging, transparency,detail, micro dynamics and frequency extension. It lays bare the tonal colorsof different instruments. Rarest of all, the Denon DL-304 makes music comealive! HI-FI CHOICE said - Feb, 1992 Not to mincewords, the DL-304 sounds superb....it is one of the very best handful ofcartridges available today. At the price, its clearly a colossal bargain.” “A professional, high performance stereocartridge, with a micro light cantilever giving a quoted frequency response of20 Hz - 50 Hz. The Gold anodized all alloy body looks stunning, audio loverswill delight with this extra detail that is brought out by this outstandingphono cartridge. The Denon DL-304 moving coil cartridge has extraordinaryresolution with excellent tracking facility even at low tracking force, verypure, natural sound.”The high compliance of this cartridge dictates that it go on a low masstonearm. The cartridge delivers excellent tracing ability with low stylusforce. Optimum force is 1.2 grams.The Denon HA500 phono head amplifier is an obvious choice for theDL-304 cartridge. By design these two excellent pieces of equipment are abeautiful match. It is in excellent condition and comes in original box andpacking. I have carefully opened it up to check the circuit board for anyleaking of capacitors. Everything is very clean inside. No leaking. I thentested it for approximately 5 albums. It operates exactly as it should. Thesound quality is excellent and very quiet. The piece rates a 9 out of 10because it is not ‘new old stock’. Otherwise it is mint.At this point in time this type of vintage gear in this condition isharder to find with availability fewer and farther between. I’ve been an audioenthusiast for over 35 years. I’m always searching the internet for exceptionalvalue and quality gear. I happened to find these two pieces at the same time.The value to you is that they were carefully selected and tested and come as aset. Act quickly as such opportunity will not last.

Lehmann Audio headphone amp / single source preamp, model Linear SE Excellent working and cosmetic condition. Comes with manual shown and power supply. Specs shown in last photo, more info available on Lehmann site. Compact size: approx 5 x 2 1/2 high x 12 deep Thanks for looking!

Excellent working condition. Cosmetically near excellent with very light wear - see photos. Comes with remote and power supply as shown. Shipping or local pickup in San Diego, CA OK. Insurance and signature confirmation if required included with shipping. Technical specs: Manhattan DAC II features include World’s highest performance 130dB Sabre 9038 DAC chipset32 bit integer Class 2 USB2 driverless audio interfaceWorld class transparent analog preamp attenuatorsMQA ® hardware decoderImproved optional phono preamplifier cardNote: network card not included ****************** Must pick up within ten days of purchase if this option chosen instead of shipping. Thanks for looking!

Technical Details (copied from Headamp from wayback): I am selling a piece of history :) You are looking at one of the very first commercial creations of Justin of Headamp. This amp, along with Gilmore lite, put Headamp on the map. This amp was the predecessor to Headamp GS-1, which itself was the predecessor to GSX Mini. As shown in the schematic, the open loop gain of the amplifer is about 35. Even with the feedback removed, the THD is less than .01%. That's important because the more linear an amplifier is without feedback, the more the THD, IM and TIM distortions are reduced to unmeasurable levels with feedback added. Stage 1 is a dual FET fully-differential fully-balanced front-end. The idling current is 2mA total per dual FET (1mA per FET) and 4mA for the complete front-end stage which consists of both dual FETs. The dual FETs generate the bias which runs the second stage, and keeps it and the resulting output section in class A at all times. The FETs are ultra low noise dual units specifically designed for audio uses. The total voltage gain of the first stage is 50. Stage 2 is the driver stage. It is a standard class A voltage amplifier - in this case used as a voltage shifter. The voltage gain is 0.5 and the idling current 4.3mA. The push-pull class A output stage is a series of paralleled emitter follower, current buffers. The voltage gain is 0.9 and the current gain is 75. The idling current is 15mA per transistor (or 60mA for the 8 transistors off the +16VDC rail and 60mA for the 8 transistors off the -16VDC rail). The servo circuit is new: most of the servo designs (Mark Levinson and Krell, for example) put the output of the DC servo back into the - leg of the amplifier. I just do not like this. That puts the noise and non-linearities of the opamp inside the audio loop. [The amp's] servo feeds back to the current sources for the dual FETs in stage 1. Like all servos, it is an integrator. Due to the large (relatively) integration capacitor and the 1 meg resistor, the frequency of this filter is 0.05 Hz. With even a decent opamp, the servo's noise is in the tens of microvolts, and does not affect the operation of the current sources significantly. The servo opamp in this amplifier measures the DC at the output, if any, integrates it and applies it to the midpoint of the two LEDs. The LEDs do have a slight change in voltage with respect to current, about 3 or 4%, and that is enough to make the servo work. The ultra-regulation of the power supply shown above is so over the top and unnecessary that most, if not all, people with this amplifier would not even notice the difference. However there are a number of benefits to this design. First it's a dual tracking design. Because the open loop gain of the amp is low, its common mode rejection due to the power supply is not great. However if both the + and - voltage rails move up and down the same amount, there is no bias drift. Because of the pre-regulators, the total line/load variations are under 0.0001%. The fast capactors allow the power supply to react rapidly and in a controlled manner with highly reactive loads like the Grados. The opamp outputs are active in both directions; they can push or pull to keep the power supply at exactly the right point. The power supply design was an attempt to come up with the absolutely best power supply I could. It is even quieter than batteries. Here are a few reviews of the Gilmore V2-SE headphone amplifier: http://www4.head-fi.org/forums/showthread.php?&threadid=40425 http://www4.head-fi.org/forums/showthread.php?&threadid=34487 Topology: Kevin Gilmore Dynalo Volume: 24-step DACT attenuator Input: 3 RCA Output: 2 SE headphone out Gain selection: Yes Pre-amp out: Yes (it has both active and passive pre-amp out. The passive preamp will bypass the amplification circuit; so you are essentially adding a volume control to your source) Loop out: Yes

Excellent working condition. Cosmetically near excellent with very light wear - see photos. Comes with remote and power supply as shown. Shipping or local pickup in San Diego, CA OK. Insurance and signature confirmation if required included with shipping. Technical specs: Manhattan DAC II features include World’s highest performance 130dB Sabre 9038 DAC chipset32 bit integer Class 2 USB2 driverless audio interfaceWorld class transparent analog preamp attenuatorsMQA ® hardware decoderImproved optional phono preamplifier cardNote: network card not included ****************** Must pick up within ten days of purchase if this option chosen instead of shipping. Thanks for looking!

The amp is in good condition! Does not include power supply. Item is as pictured. If you have any questions feel free to ask!

Excellent working condition. Cosmetically near excellent with very light wear - see photos. Comes with remote, batteries, cable, manual and power supply as shown. Shipping or local pickup in San Diego, CA OK. Insurance and signature confirmation if required included with shipping. Benchmark DAC3 technologies: Harmonic CompensationHybrid Gain ControlUltraLock3™ Jitter Attenuation SystemHigh-Headroom DSPMulti-Mode Asynchronous USB Audio SystemQuad 32-bit balanced D/A Conversion SystemDistributed Power Regulation ****************** Must pick up within ten days of purchase if this option chosen instead of shipping. Thanks for looking!

Lehmann Audio headphone amp / single source preamp, model Linear SE Excellent working and cosmetic condition. Comes with manual shown and power supply. Specs shown in last photo, more info available on Lehmann site. Compact size: approx 5 x 2 1/2 high x 12 deep Thanks for looking!

Excellent working condition. Cosmetically near excellent with very light wear - see photos. Comes with remote and power supply as shown. Shipping or local pickup in San Diego, CA OK. Insurance and signature confirmation if required included with shipping. Technical specs: Manhattan DAC II features include World’s highest performance 130dB Sabre 9038 DAC chipset32 bit integer Class 2 USB2 driverless audio interfaceWorld class transparent analog preamp attenuatorsMQA ® hardware decoderImproved optional phono preamplifier cardNote: network card not included ****************** Must pick up within ten days of purchase if this option chosen instead of shipping. Thanks for looking!

Want to try a moving coilcartridge, but only have a phono input? With these two pieces you can! Aclassic matched vintage moving coil cartridge with phono head amplifier. Hereare some quotes from reviews:“The Denon DL-304 audiophile moving coil cartridge providesultimate performance in the most demanding high-end system.” “One of the biggest bargains in phonocartridges, the Denon DL-304 offers the fastidious listener all the virtues ofa truly superlative cartridge, such as sound staging, imaging, transparency,detail, micro dynamics and frequency extension. It lays bare the tonal colorsof different instruments. Rarest of all, the Denon DL-304 makes music comealive! HI-FI CHOICE said - Feb, 1992 Not to mincewords, the DL-304 sounds superb....it is one of the very best handful ofcartridges available today. At the price, its clearly a colossal bargain.” “A professional, high performance stereocartridge, with a micro light cantilever giving a quoted frequency response of20 Hz - 50 Hz. The Gold anodized all alloy body looks stunning, audio loverswill delight with this extra detail that is brought out by this outstandingphono cartridge. The Denon DL-304 moving coil cartridge has extraordinaryresolution with excellent tracking facility even at low tracking force, verypure, natural sound.”The high compliance of this cartridge dictates that it go on a low masstonearm. The cartridge delivers excellent tracing ability with low stylusforce. Optimum force is 1.2 grams.The Denon HA500 phono head amplifier is an obvious choice for theDL-304 cartridge. By design these two excellent pieces of equipment are abeautiful match. It is in excellent condition and comes in original box andpacking. I have carefully opened it up to check the circuit board for anyleaking of capacitors. Everything is very clean inside. No leaking. I thentested it for approximately 5 albums. It operates exactly as it should. Thesound quality is excellent and very quiet. The piece rates a 9 out of 10because it is not ‘new old stock’. Otherwise it is mint.At this point in time this type of vintage gear in this condition isharder to find with availability fewer and farther between. I’ve been an audioenthusiast for over 35 years. I’m always searching the internet for exceptionalvalue and quality gear. I happened to find these two pieces at the same time.The value to you is that they were carefully selected and tested and come as aset. Act quickly as such opportunity will not last.