Topping L70 Fully Balanced NFCA Headphone Amp - 4-Pin-XLR/4.4mm Balanced/6.35mm SE Headphone Jacks Amplifier 7500mW x 2 Ouput R2R Volume Control HiFi Amp Audio Hi-Res Preamplifier(Sliver)Brand NewHigh Feedback Seller - Buy With ConfidenceFree Insured ShippingLiquidation Seller All Sales Final DescriptionUltra-High Performance NFCA ModulesL70 uses same NFCA (Nested Feedback Composite Amplifier) module with A90. Voltage current hybrid feedback architecture along with UHGF (Ultra High Gain Feedback) technology provide excellent DC and AC performance, ultra-low THD+N and absurdly high dynamic range of 146dB. Even more, high output current drive capability, ultra-low output impedance and the ultra-low noise of 0.3uV which is miles ahead of the competition provide sufficient guarantee for driving headphones with various characteristics, so that high-fidelity music can be vividly performed on different headphones.Topping L70 HighlightsFully Balanced Headphone Amp CircuitPre-Amp SupportMultiple Headphone Output Ports(4-pin XLR, 4.4mm Bal, 6.35mm SE)Relay Volume ControlVolume Memory FunctionNFCA Amplification ModulesClean and Powerful OutputHigh Dynamic RangeUltra-Low Noise-FloorLow-Distortion In The Output SignalTwo-level Gain ModesUltra-Low Output ImpedanceGround Loop Noise Terminator12V Trigger InterfaceUp to 7500mWx2 Output Power(32?), 1150mWx2(300?)Headphone Outputs Whichever Way You Want ItThe L70 is compatible with common headphone jacks including: 4-pin XLR balanced, 4.4mm balanced, 6.35mm single-ended, and 3.5mm single ended.The built-in fully balanced amplifier circuit can not only ft well with balanced headphones, but also have perfect performance with single-ended headphones.Compatible With Almost All Kinds Of HeadphonesL70s output has high output voltage, high output current, low noise, low output impedance, so no headphones that cant be dealt with.High output voltage can easily drive high impedance headphones;High output current allows low-sensitivity headphones to obtain enough power;Low noise allows high-sensitivity IEMs to not suffer from any background noise;The low output impedance will not bring unnecessary effect on FR when driving low-impedance headphones. Different headphones can be easily driven by the L70

Rarely used almost mint condition Singer SA-1 Headphone Amp.I am using tubes amp. now so this Singer SA-1 has to go to a new home for someone else to enjoy its clean clear sound.Everything works and no issue with it.I dont see any real visible scratch anywhere unless under spotlight.Sorry, no overseas sale. Shipping to Alaska or Hawaii will be higher.Please ask if you have any questions.Payment is due by 3 days after auction close.Thanks.

iFi’s 4.4mm to XLR cable gives excellent quality balanced signal transfer and minimum interference with its heavy OFHC continuous cast copper, silver matrix conductors with a total cross-section of 16AWG for the best signal transfer. Helix braiding design protects the cable from EMI and RFI noise. This cable is pre-owned but in like-new condition. Ships out on same or next USPS business day after payment.

Douk Audio U5 balanced headphone amplifier with 5V 900mA ETA0U60JBE linear power supply. Theyre usually rated for 700ma but we test and cherry pick the best ones for amplifiers like this. Its got 1400mw at 32 ohm and uses a 5 volt source for power, so the Samsung charger is perfect as it provides cleaner power than the Apple chargers (so many fakes of them, and $29 to get a real one from Apple). Like many analog volume control amplifiers, channel balance is best over 30 percent. This has some really good power with the additional current, and the planar magnetic headphones I tested it with sounded terrific. We ship the same day on orders before 12pm EST Mon-Fri and 10am Saturday. Your order will be packed and boxed very carefully. Visit our store, we specialize in audio equipment, and constantly have new items arriving. Please send a note with any questions for a prompt reply.

This is a superb sounding and very powerful headphone amplifier. It can drive any type of headphone with full authority and finesse. Your ears will give up or your HP will distort, but not this amp. Lots of distortion-free power at your finger tips. I paired it with the excellent Topping EX5 DAC (also for sale here). Please check it out! The combo has excellent synergy! Ultra distortion-free class A operation for HP impedance of 250 ohms or greater. Power, performance, and practical new featuresBoasting six times the power, double the inputs, and massive gains in SNR and THD+N over the original (not to mention some practical new features), the A30 Pro is an excellent choice for the modern music lover looking for an amp that can do it all. Six watts per channelThe TOPPING A30 Pro outputs 6,000 milliwatts per channel at 16?, 5,500 milliwatts per channel at 32?, and 840mw per channel at 300?. With can-rattling wattage like that, it can easily power notoriously hard-to-drive full-size headphones like the Sennheiser HD 660 S and the Beyerdynamic DT1990 Pro145dB dynamic rangeThanks to its NFCA-based circuit and UHGF (ultra high gain feedback) technology, the A30 Pro delivers a stunning 145dB of dynamic range. This means that 145dB exists between the lowest and highest volumes of sound it can reproduce, resulting in exceptionally realistic playback.Say goodbye to ground loop noiseWhen multiple pieces of equipment are used in conjunction, ground loop noise can occur. Ground loop noise most often manifests as a buzzing or humming sound, which is capable of being loud enough to damage speakers. Although its known to happen most often in single-ended feeds, it can happen in balanced feeds, too.The A30 Pro solves this issue with a GND/LIFT switch. When in normal use, set the switch to GND. If you encounter ground loop noise, set the switch to LIFT, which will change the ground point of the A30 Pro from its chassis to the equipment it’s connected to, eliminating the noise. Single-ended and balanced input passthroughWhen powered down, the A30 Pro passes the input signal directly through to RCA or TRS without applying amplification. This allows you to connect active monitors to the A30 Pro and get the benefits of an outboard DAC without introducing another amp into the chain. Three-step gain switch A three-step gain switch adapts the A30 Pro to the huge sensitivity gap between IEMs and full-size headphones. From -14dB on the low setting to +14dB on the high setting, the function spans an impressive 28dB.

Sabaj A20h headphone amplifier in perfect condition with power cable, remote control, and 6.35mm extended adapter. Digital volume control for perfect channel matching and enough power for the Hifiman He6se. Noise floor and output impedance near zero for even low ohm IEMs. Fully balanced, so the full power output is on the XLR and 4.4mm connectors. The 6.35mm still has enough power for 600 ohm Beyerdynamic models. Audiosciencereview did full measurements of the A10h, and this one has the same design, but twice as much power. Visit our eBay store and watch our items to receive discount offers. Please send a note with any questions for a prompt reply. We ship the same day on orders before 12pm EST Mon-Fri and 10am Saturday. Your order will be packed and boxed very carefully. We specialize in audio equipment, and have new items listed several times each week. All shipping is at eBay negotiated rates with no markup. Specification Inputs: XLR, RCA Output: 4-pin XLRbalanced, 4.4mm balanced 6.35mm unbalanced Output Power: 4W(16?), 2W(32?), 1W(300?), 500mW(600?) SNR: 137dB Output Noise : 1.3uV THD+N: -121dB, 0.00008%(1kHz, 32?) THD+N: -120dB, 0.0001%(20Hz-20kHz, 32?, -1dB) THD: ?-125dB, 0.00006% Input Impedance: 47k? Output Impedance: Near 0? Frequency Response: 20Hz-500kHz(-3dB) Gain: Low(0dB), Medium(+9dB), High(+15dB) Power supply voltage: DC 15V Power consumption: ?30W Standby power consumption: ?0.1W

Hart Audio Cable multi kit for Hifiman, Focal, or any headphones using the double 3.5mm TRS connectors. Clean and mint condition. Main cable is 4.5ft plus length of the multi kit modules. We ship the same day on orders before 12pm EST Mon-Fri and 10am Saturday. Includes: HC-9 Dual 3.5mm TRS Balanced Headphone Cable Regular price Sale price$42.00 IC-2: 3.5mm TRS Regular price Sale price $13.00 IC-3: 4-Pin XLR Regular price Sale price$20.00 IC-6: 4.4mm TRRRS Regular price Sale price $20.00 3.5mm to 6.35mm adapter Visit our store, we specialize in audio equipment, and constantly have new items arriving. Please send a note with any questions for a prompt reply. Your order will be packed carefully. USPS, UPS and FedEx shipping options available at checkout. All shipping is at eBay negotiated rates with no markup. These are for Hifiman or Focal that use the double 3.5mm connectors like: Hifiman Sundara Hifiman Arya Hifiman Ananda Hifiman Edition X V2 Hifiman SUSVARA Hifiman Arya Hifiman HE4XX Hifiman HE-400i 2020 Hifiman HE1000 V2 Hifiman HE400se HIFIMAN He-5 Hifiman He-6 Hifiman He-400 Hifiman He-500 Hifiman He560 Focal Elegia Focal Elear Focal Clear Focal Elex Focal Clear Pro Focal Stellia

Im the original owner of the iFi Zen Dac v2 ($199 retail). Additionally up for auction: Im the original owner of the balanced 4.4mm to XLR braided cable ($99 retail). NOTE: this cable is for connecting the 4.4mm pre-out to the input of a balanced XLR external amp -- it is not a cable for your headphones! (The amp feature of this unit is a nice convenience feature, but its best performance is as a standalone DAC in tandem with a headphone or speaker amp.) I use this cable to run to my JBL studio monitor speakers (the volume knob allows me to control volume to the speakers), while the RCA out goes to my headphone amp. A nice budget desktop set-up! Also, if you eventually go up the iFi line to their more expensive DACs, this cable will work with all of them. Only downside here is that I lost the box during a recent move. Ill pack the amp, original USB cable, and upgraded cable with care. Free and fast FedEx or UPS shipping. See my reviews to bid with confidence.

Sabaj A20h headphone amplifier in perfect condition with power cable, remote control, and 6.35mm extended adapter. Digital volume control for perfect channel matching and enough power for the Hifiman He6se. Noise floor and output impedance near zero for even low ohm IEMs. Fully balanced, so the full power output is on the XLR and 4.4mm connectors. The 6.35mm still has enough power for 600 ohm Beyerdynamic models. Audiosciencereview did full measurements of the A10h, and this one has the same design, but twice as much power. Visit our eBay store and watch our items to receive discount offers. Please send a note with any questions for a prompt reply. We ship the same day on orders before 12pm EST Mon-Fri and 10am Saturday. Your order will be packed and boxed very carefully. We specialize in audio equipment, and have new items listed several times each week. We offer USPS, UPS and FedEx shipping options available at checkout. All shipping is at eBay negotiated rates with no markup. Specification Inputs: XLR, RCA Output: 4-pin XLRbalanced, 4.4mm balanced 6.35mm unbalanced Output Power: 4W(16?), 2W(32?), 1W(300?), 500mW(600?) SNR: 137dB Output Noise : 1.3uV THD+N: -121dB, 0.00008%(1kHz, 32?) THD+N: -120dB, 0.0001%(20Hz-20kHz, 32?, -1dB) THD: ?-125dB, 0.00006% Input Impedance: 47k? Output Impedance: Near 0? Frequency Response: 20Hz-500kHz(-3dB) Gain: Low(0dB), Medium(+9dB), High(+15dB) Power supply voltage: DC 15V Power consumption: ?30W Standby power consumption: ?0.1W

HIFI 4 Pin male XLR to 4.4mm Female Adapter.

Meet the iFi 4.4mm to XLR Cable. Features & details ?UPGRADE TO BALANCED – Balanced cables are more resistant to external noise. Upgrade your system by implementing a premium balanced cable, suitable for use with DAC / AMPs / Active Speakers and more. ?MAXIMUM SIGNAL TRANSFER – Employing heavy OFHC continuous cast copper and silver matrix conductors for the best signal transfer ?HIGH-QUALITY CONSTRUCTION – Aluminium alloy chassis with gold-plated connectors on the XLR connectors and a Gold-plated smooth surface with precise angle machining on the 4.4mm connector ?HELIX DESIGN - Featuring the custom helix minZ design, minimised both in capacitance and inductance and boasting intrinsic shielding provided by the helix construction. ?INSULATED – To further insulate the cable we adopted the RoHS compliant, excellent dielectric property and super-soft HD polymer with 1500V AC Spark Resistance. Created to give you maximum quality balanced signal transfer and minimum interference. iFi 4.4mm to XLR cable employs heavy OFHC continuous cast copper, silver matrix conductors with a total cross-section of 16AWG for the best signal transfer. The cable construction is a custom helix minZ design, minimised both in capacitance and inductance. It also has intrinsic shielding provided by minZ helix construction. These features protect the cable from RFI and EMI noise and provide the cleanest transfer medium possible. To further insulate the cable, we adopted the RoHS compliant, excellent dielectric property and super-soft (60P) HD polymer with 1500V AC spark resistance. Quality Design Aluminium alloy chassis with gold-plated connectors Minimum resistance, flawless balance. minZ helix insulation Heavy OFHC continuous cast copper silver matrix 16AWG conductors Super-soft (60P) HD polymer minZ helix insulation construction. Attention to detail Gold-plated smooth surface Precise angle machining 1mm raised lip. High quality audio Braided for low resistance.

Will ship same day! Fully balanced tube and headphone amp xDuoo MT-604 with all original packaging. Plus two Ciwoda XLR Cable 6ft 2Pack, Multi-Color Heavy Duty Nylon Braided XLR Male to Female. All in mint condition in perfect condition plus it’s the loudest headphone amp I’ve ever heard! Fully-balanced tube amp xDuoo doesn’t do incremental improvements. They evolve by leaps and bounds. The MT-604 is a Class-A tube amp that doubles its predecessor’s tube count and channels, making for a fully balanced tube amp experience. Class-A amplifier The MT-604 is a class-A amplifier. Using simple circuits that draw the same amount of current and consume the same amount of energy whether receiving a signal or not, this is the most straightforward of amplifier types. It isn’t subject to electromagnetic interference caused by digital components, so its total harmonic distortion and signal-to-noise ratio are exceptionally low. 53% more power than the MT-602 The MT-604 outputs up to 2000mW (32?) of power. That’s 53% more power than the MT-602--enough to drive even the HiFiMAN HE-4. Tube + transistor A common complaint about tube amplifiers is their lack of high frequency response and resolving power. To overcome this, xDuoo added a rear transistor circuit capable of large dynamics, high speed, and resolving power. Tubes + transistor: the best of both worlds. XLR and 4.4 balanced input/output The MT-604 is a fully balanced amplifier. Plug in any source into its XLR or 4.4mm balanced inputs, and enjoy rich, unhampered sound from its XLR or 4.4mm balanced outs. Independent left/right volume adjustment Sound bias--the phenomenon of one driver being louder than the other--is a thing of the past with the MT-604. Independent left and right volume adjustments let you control each channel separately, ensuring perfectly equal volume across both headphone earcups. Built-in mute circuit Anyone who’s ever plugged in their headphones before turning on their amplifier knows that many amplifiers make an ear-splitting “pop!” noise when turned on. Thanks to a built-in mute circuit, the MT-604 prevents this from happening, saving your ears and your patience. Interference-blocking chassis with sand-blasted texture The aluminum alloy chassis offers a rugged defense against bumps, bruises, and electronic interference. The sand-blasted gray shell beautifully complements the striking red dials and atomic-era aesthetic of the tubes. Tubes will roll Adventurous audiophiles will love swapping out the stock tubes for other tubes. Every model of tube has a different sound signature, enhancing or reducing warmth, detail, and soundstage. It’s a fun way to play with the sound signature of a single amp, often for less than $30 a pop. Just be sure to find a reputable dealer of tubes before buying. Product highlights Tubes + transistor hybrid Fully balanced amp Four 6J1 tubes Class-A amplifier 53% more power than MT-602 XLR and 4.4mm balanced outputs Independent left/right volume adjustment Built-in mute circuit Interference-blocking chassis Switchable tubes Specs Power supply: DC12V/2A Output power: 2000mW @32? 1kHz Inputs: XLR Outputs: XLR, 4.4mm balanced Dynamic range: 85dBA @32? Frequency response: 10Hz - 60,000Hz (±0.5dB) Suitable headphone impedance: 16? - 600? Gain: +15dB S/N: 115dB THD+N: ?0.01% (@32?, 1kHz) Size: 6.6” x 3.9” x 2.3” (17 x 10 x 6cm) Weight: 1.2lbs (0.55kg)

Excellent audio cable in fine condition!

Topping DX7s Dac / Headphone amp. This unit can be used as a headphone dac/amp or switched to line out dac for your home amp/speakers via a button on the unit or remote. Everything shown is included, works great with headphones and as a stand alone dac. handles PCM 32bit 768hz as well as DSD up to 512! Can also serve as a preamplifier if hooked up to an amp (volume control enabled).Bonus XLR to 4.4 headphone jack included. You can listen to headphones through a balanced connection via 4.4mm jack if you have such headphones. Of course if you have an XLR jack for your headphones or use the standard single ended jack, you wont need this. Unit works great as a stand alone DAC, this is mostly what I used it for running Roon to RCA out into my preamp. It will recognize native DSD from Roon.Great little dac for a not a lot of money. I ship quickly and package safely.Thank you for checking out my listing!

Excellent audio cable in fine condition!

Good Conditions Free Shipping PLEASE NOTE:The item you see is the EXACT item you are receiving. The pictures show the best description of the condition of the item. Thank you for Looking, We leave a positive review Automatically after you make the Payment. Blessings

Like New conditions. Comes with AC adapters. The box may be damaged.

?Fully balanced headphone amplifier?Adopting fully balanced amplifier circuit and innovative circuit design, the amplifier circuit of U5 always works at a high voltage of 24V even if input DC 5V, with wide frequency response extension, excellent transient response, excellent purity and transparency, and good dynamic range. ?Easily to drive low or high impedance headphones?For a total power output of up to 1400mW under a 32? load, U5 can easily power headphones with any low or high impedance (18-600?). Volume knob allows you to smoothly adjust volume without any undesirable noise nor any channel imbalances. Add to Favorites Seller Join newsletter New Arrival Ending Soon View Feedback About Us Contact Us View All Categories Nobsound & Douk Audio Add-on Items US Warehouse UK Warehouse DE Warehouse AU Warehouse Digital Amplifier Tube Amplifier Audio Amplifier Preamp & Phono Stage Headphone Amplifier DAC & Audio Adapter Audio Splitter/Switcher Audio Processor Audio Player Music Spectrum & Clock Empty Chassis Record Player & Turntable Part Power Supply Vacuum Tubes Hi-Fi Speakers Hi-Fi Cable Transformer Radio Communication Audio Accessories Other Home Feedback Save Seller New Listed Ending Soon Contact us Store Category Nobsound & Douk Audio Add-on Items US Warehouse Add-on Items Amplifier Preamp & Phono Stage Headphone Amplifier DAC & Audio Adapter Audio Splitter/Switcher Music Spectrum & Clock Audio Accessories Other UK Warehouse Add-on Items Digital Amplifier Tube Amplifier Hi-Fi Amplifier Preamp & Phono Stage Headphone Amplifier DAC & Audio Adapter Audio Splitter/Switcher Audio Processor Music Spectrum & Clock Record Player & Turntable Part Audio Board & DIY Kit Audio Accessories Other DE Warehouse Add-on Items Digital Amplifier Tube Amplifier Hi-Fi Amplifier Preamp & Phono Stage Headphone Amplifier DAC & Audio Adapter Audio Splitter/Switcher Audio Processor Music Spectrum & Clock Aluminum Chassis Record Player & Turntable Part Audio Board & DIY Kit Radio Communication Audio Accessories Other AU Warehouse Add-on Items Amplifier Preamp & Phono Stage Headphone Amplifier DAC & Audio Adapter Audio Splitter/Switcher Music Spectrum & Clock Audio Accessories Other Digital Amplifier Multi-Function Mono Channel 2.0 Channel 2.1 Channel 4.0 Channel 5.1 Channel Tube Amplifier DIY Kit Hybrid Amplifier Mini Tube Amplifier EL34 Tube Amplifier KT88 Tube Amplifier 300B Tube Amplifier Other Tube Amplifier Audio Amplifier Mini Amplifier Integrated Amplifier Power Amplifier Audio Board & DIY Kit Preamp & Phono Stage Tube Preamp Digital Preamp Phono Preamp Passive Preamp Audio Board & DIY Kit Headphone Amplifier Mini Headphone Amp Desktop Headphone Amp Portable Headphone Amp Tube Headphone Amp DAC & Audio Adapter Audio Adapter USB DAC Bluetooth Receiver/Transmitter Digital Interface Audio Board & DIY Kit Audio Splitter/Switcher Speaker Switcher Bluetooth & XLR & MIC 2 Way 3 Way 4 Way Multiple Way Audio Processor Guitar Effects Equalizer Audio Mixer Noise Isolator Audio Player Digital Player Record Player CD Player Portable Player Music Spectrum & Clock Analog VU Meter Tube Sound Level Meter LED Sound Level Meter VFD Audio Spectrum LED Clock Nixie Tube Clock VFD Tube Clock IPS Nixie Clock Oscilloscope Tube Clock Board & DIY Kit Other Empty Chassis Small-sized Medium-sized Large-sized Personalized Record Player & Turntable Part Set-up Transformer Record Weight & Clamp Cleaning Kit Scale Gauge Platter Mat Dust Cover Needle Other Power Supply Linear Power Supply Switching Power Supply Power Supply Filter USB Charging Hub Board & DIY Kit Vacuum Tubes Shuguang Tube PSVANE Tube Tube Socket Tube Tester Probe Hi-Fi Speakers Frequency Divider Speaker Unit Hi-Fi Cable RCA Audio Cable 1/8 & 1/4 Stereo Jack Cable Speaker Cable USB Cable Optical Fiber Cable Conversion Cable Dock Cable Other Transformer Toroidal transformer Output Transformer Other Radio Communication Tesla Coil Transmitter & Receiver Signal Generator Antennas & Tuners Shortwave Radios Ham Amateur Radio Audio Accessories Volume Controller Mount Stand Bracket Feet & Pads Op Amp Headphone Current Meter Other Other Join Our Newsletter Receive our email newsletters about new items and special promotions! Sign Up Now ! Douk Audio U5 Mini Fully Balanced Headphone Amplifier for XLR / 4.4mm Headsets Item description Features ?Fully balanced headphone amplifier?Adopting fully balanced amplifier circuit and innovative circuit design, the amplifier circuit of U5 always works at a high voltage of 24V even if input DC 5V, with wide frequency response extension, excellent transient response, excellent purity and transparency, and good dynamic range. ?Easily to drive low or high impedance headphones?For a total power output of up to 1400mW under a 32Ω load, U5 can easily power headphones with any low or high impedance (18-600Ω). Volume knob allows you to smoothly adjust volume without any undesirable noise nor any channel imbalances. ?Pure analog design to reproduce music truly?Pure analog amplification circuit and analog control, show you the truest sound, all aspects are in the top-class such as sound field, sound position, details etc.. Adopt original JRC4580 classical op amp, pluggable socket design, convenient to upgrade different op amps to enjoy other sound styles. ?Most cost-effective amp on the market?Mini size and exquisite appearance, and with low distortion, high power and a pure, uncolored sound, you’ll experience subtle details and shocking swings in your music effortlessly. U5, the best helper for all xlr/4.4mm headphones to improve their sound quality. Warm tips: Without DC 5V power adapter, you can use your phone charger, input over 5V will result in damage. Parameters: Audio input: stereo L/R XLR ( 3-core, female) Audio output: XLR ( 4-core, female) / 4.4mm Output power: ≥1400mW (32Ω) Matched headphone impedance: 18-600Ω Frequency response: 20-30KHz Signal to noise ratio: ≥110DB THD: 0.005% Input voltage: DC 5V (recommend above 1A) Dimension(W*D*H): 68*69*28mm / 2.68*2.72*1.50in Net weight: 149g / 0.33lb Package weight: 500g / 1.10lb Packing List 1*U5 Headphone Amplifier Payment Fast Shipping Return Policy About us Contact us Payment Safe and secure payment by PayPal. Fast Shipping The items are located in US, and will be shipped within 1 working day, 2-6 working days to deliver. Return Policy Free Return Within 30 Days We provide free return with 30 days for all items you bought on eBay, full refund and return shipping will be provided. 1-year warranty is provided for all items(Excluding: 1. Man-made damage or misuse. 2. Audio accessories and consumables such as vacuum tubes). If you are satisfied with our products and service please leave a 5-star . Feedback is very important to us just like our lives, please DO contact us before you leave a neutral or negative feedback, we will provide better solutions until you are satisfied. About us Douk Audio / Nobsound Studio was founded in 2013 in Shenzhen CHINA, we own several brands including Douk Audio / Nobsound / Little Bear etc. As a professional audio company, we are dedicated to design and produce the best products at the lowest prices to make HiFi affordable. We will spare no efforts to bring great products and service for customers and extremely to improve our customers listening experience. Contact us Please dont hesitate to contact us if you have any questions or comments about our items. And our working time is from Monday to Friday between 9:00 am to 06:00 pm(Beijing Time), which means we can keep on-line at: Working time Beijing(CN)Monday-Friday09:00 AM - 18:00 AMNew York(US)Sunday to Thursday08:00 PM - 05:00 AMLondon(UK)Monday-Friday01:00 AM - 10:00 AMParis(FR)Monday-Friday02:00 AM - 11:00 AM During holiday, please allow us to response you early next week. Please dont leave any negative / neutral feedback or make dispute/claim on our non-working time, thank you for your understanding and cooperation. Home Feedback Save Seller New Listed Ending Soon Contact us

Excellent condition and comes in its original box with all accessories.

XDUOO MT-604 6J1*4 Balanced Tube Pre-amp XLR/4.4MM Class-A Hybrid Amplifier. Like new. Barely used Does not come with original tubes (which were not great imo anyway) but comes with a set of 4 matched NOS Voskhod Russian made tubes from the 50’s that sound marvelous.

?Fully balanced headphone amplifier?Adopting fully balanced amplifier circuit and innovative circuit design, the amplifier circuit of U5 always works at a high voltage of 24V even if input DC 5V, with wide frequency response extension, excellent transient response, excellent purity and transparency, and good dynamic range. ?Easily to drive low or high impedance headphones?For a total power output of up to 1400mW under a 32? load, U5 can easily power headphones with any low or high impedance (18-600?). Volume knob allows you to smoothly adjust volume without any undesirable noise nor any channel imbalances. Add to Favorites Seller Join newsletter New Arrival Ending Soon View Feedback About Us Contact Us View All Categories Nobsound & Douk Audio Add-on Items US Warehouse UK Warehouse DE Warehouse AU Warehouse Digital Amplifier Tube Amplifier Audio Amplifier Preamp & Phono Stage Headphone Amplifier DAC & Audio Adapter Audio Splitter/Switcher Audio Processor Audio Player Music Spectrum & Clock Empty Chassis Record Player & Turntable Part Power Supply Vacuum Tubes Hi-Fi Speakers Hi-Fi Cable Transformer Radio Communication Audio Accessories Other Home Feedback Save Seller New Listed Ending Soon Contact us Store Category Nobsound & Douk Audio Add-on Items US Warehouse Add-on Items Amplifier Preamp & Phono Stage Headphone Amplifier DAC & Audio Adapter Audio Splitter/Switcher Music Spectrum & Clock Audio Accessories Other UK Warehouse Add-on Items Digital Amplifier Tube Amplifier Hi-Fi Amplifier Preamp & Phono Stage Headphone Amplifier DAC & Audio Adapter Audio Splitter/Switcher Audio Processor Music Spectrum & Clock Record Player & Turntable Part Audio Board & DIY Kit Audio Accessories Other DE Warehouse Add-on Items Digital Amplifier Tube Amplifier Hi-Fi Amplifier Preamp & Phono Stage Headphone Amplifier DAC & Audio Adapter Audio Splitter/Switcher Audio Processor Music Spectrum & Clock Aluminum Chassis Record Player & Turntable Part Audio Board & DIY Kit Radio Communication Audio Accessories Other AU Warehouse Add-on Items Amplifier Preamp & Phono Stage Headphone Amplifier DAC & Audio Adapter Audio Splitter/Switcher Music Spectrum & Clock Audio Accessories Other Digital Amplifier Multi-Function Mono Channel 2.0 Channel 2.1 Channel 4.0 Channel 5.1 Channel Tube Amplifier DIY Kit Hybrid Amplifier Mini Tube Amplifier EL34 Tube Amplifier KT88 Tube Amplifier 300B Tube Amplifier Other Tube Amplifier Audio Amplifier Mini Amplifier Integrated Amplifier Power Amplifier Audio Board & DIY Kit Preamp & Phono Stage Tube Preamp Digital Preamp Phono Preamp Passive Preamp Audio Board & DIY Kit Headphone Amplifier Mini Headphone Amp Desktop Headphone Amp Portable Headphone Amp Tube Headphone Amp DAC & Audio Adapter Audio Adapter USB DAC Bluetooth Receiver/Transmitter Digital Interface Audio Board & DIY Kit Audio Splitter/Switcher Speaker Switcher Bluetooth & XLR & MIC 2 Way 3 Way 4 Way Multiple Way Audio Processor Guitar Effects Equalizer Audio Mixer Noise Isolator Audio Player Digital Player Record Player CD Player Portable Player Music Spectrum & Clock Analog VU Meter Tube Sound Level Meter LED Sound Level Meter VFD Audio Spectrum LED Clock Nixie Tube Clock VFD Tube Clock IPS Nixie Clock Oscilloscope Tube Clock Board & DIY Kit Other Empty Chassis Small-sized Medium-sized Large-sized Personalized Record Player & Turntable Part Set-up Transformer Record Weight & Clamp Cleaning Kit Scale Gauge Platter Mat Dust Cover Needle Other Power Supply Linear Power Supply Switching Power Supply Power Supply Filter USB Charging Hub Board & DIY Kit Vacuum Tubes Shuguang Tube PSVANE Tube Tube Socket Tube Tester Probe Hi-Fi Speakers Frequency Divider Speaker Unit Hi-Fi Cable RCA Audio Cable 1/8 & 1/4 Stereo Jack Cable Speaker Cable USB Cable Optical Fiber Cable Conversion Cable Dock Cable Other Transformer Toroidal transformer Output Transformer Other Radio Communication Tesla Coil Transmitter & Receiver Signal Generator Antennas & Tuners Shortwave Radios Ham Amateur Radio Audio Accessories Volume Controller Mount Stand Bracket Feet & Pads Op Amp Headphone Current Meter Other Other Join Our Newsletter Receive our email newsletters about new items and special promotions! Sign Up Now ! Douk Audio U5 Mini Fully Balanced Headphone Amplifier for XLR / 4.4mm Headsets Item description Features ?Fully balanced headphone amplifier?Adopting fully balanced amplifier circuit and innovative circuit design, the amplifier circuit of U5 always works at a high voltage of 24V even if input DC 5V, with wide frequency response extension, excellent transient response, excellent purity and transparency, and good dynamic range. ?Easily to drive low or high impedance headphones?For a total power output of up to 1400mW under a 32Ω load, U5 can easily power headphones with any low or high impedance (18-600Ω). Volume knob allows you to smoothly adjust volume without any undesirable noise nor any channel imbalances. ?Pure analog design to reproduce music truly?Pure analog amplification circuit and analog control, show you the truest sound, all aspects are in the top-class such as sound field, sound position, details etc.. Adopt original JRC4580 classical op amp, pluggable socket design, convenient to upgrade different op amps to enjoy other sound styles. ?Most cost-effective amp on the market?Mini size and exquisite appearance, and with low distortion, high power and a pure, uncolored sound, you’ll experience subtle details and shocking swings in your music effortlessly. U5, the best helper for all xlr/4.4mm headphones to improve their sound quality. Warm tips: Without DC 5V power adapter, you can use your phone charger, input over 5V will result in damage. Parameters: Audio input: stereo L/R XLR ( 3-core, female) Audio output: XLR ( 4-core, female) / 4.4mm Output power: ≥1400mW (32Ω) Matched headphone impedance: 18-600Ω Frequency response: 20-30KHz Signal to noise ratio: ≥110DB THD: 0.005% Input voltage: DC 5V (recommend above 1A) Dimension(W*D*H): 68*69*28mm / 2.68*2.72*1.50in Net weight: 149g / 0.33lb Package weight: 500g / 1.10lb Packing List 1*U5 Headphone Amplifier 1*USB to DC Cable Payment Fast Shipping Return Policy About us Contact us Payment Safe and secure payment by PayPal. Fast Shipping The items are located in US, and will be shipped within 1 working day, 2-6 working days to deliver. Return Policy Free Return Within 30 Days We provide free return with 30 days for all items you bought on eBay, full refund and return shipping will be provided. 1-year warranty is provided for all items(Excluding: 1. Man-made damage or misuse. 2. Audio accessories and consumables such as vacuum tubes). If you are satisfied with our products and service please leave a 5-star . Feedback is very important to us just like our lives, please DO contact us before you leave a neutral or negative feedback, we will provide better solutions until you are satisfied. About us Douk Audio / Nobsound Studio was founded in 2013 in Shenzhen CHINA, we own several brands including Douk Audio / Nobsound / Little Bear etc. As a professional audio company, we are dedicated to design and produce the best products at the lowest prices to make HiFi affordable. We will spare no efforts to bring great products and service for customers and extremely to improve our customers listening experience. Contact us Please dont hesitate to contact us if you have any questions or comments about our items. 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