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- Quloos QH1 - QH1
Quloos QH1
Fully Balanced Preamp & Portable Desktop Headphone Amplifier
- 14 pairs of FZT power transistors for discrete amplification
- Switchable between Class A/AB modes Audio Note KAISEI Audio Quality Electrolytic Capacitors
- MUSES72323 lossless volume program control
- Built-in battery reference-grade pure power supply
- CNC-machined all-aluminum enclosure for enhanced shielding vibration isolation
Regular price
$1,298.00
Sale price
$1,298.00
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Low stock
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Estimated Delivery:Mar 18 - Mar 22

Quloos QH1
Separated Circuit Power Amplification
- Featuring the high-performance FZT power transistors.
- Enhanced sound quality and drive capability.14 pairs of transistors in parallel to boost current output.
- Optimized drive capability for both high-impedance and low-impedance headphones.
- Delivering detailed and refined sound even at high power levels, avoiding harshness.
- Producing sound that is three-dimensional, high-density, delicate, smooth, and well-defined.
Fully Balanced Architecture
- Single-ended input that is first converted into a balanced signal, allowing single-ended input to benefit from the advantages of fully balanced operation.
- Fully balanced transmission eliminating common ground line and common-mode noise, resulting in more stable sound.
- Improved signal-to-noise ratio and expanded dynamic range for better presentation of micro-dynamics of music.
- Complete separation of left and right channels reducing crosstalk.
- Enhanced sense of spatiality and a wider soundstage, bringing the music vividly to life.
- Balanced Transformer Less (BTL) amplification theoretically providing 4 times the power of single-ended amplification.
- Increased voltage driving capability easily supporting high-impedance headphones.
Two-in-One Solution Available for Desktop/Tabletop and Portable Use
- The separate design where the large desktop headphone amplifier is split into two separate units: the amplifier and the power supply.
- The design isolating interference, optimizing vibration reduction, and saving desk space.
- Separate power supply with 80W toroidal transformer , equivalent to many large independent headphone amplifiers.
- The built-in battery enabling you to enjoy high-quality music anytime, anywhere.
Internal Battery Powered Supply
- Class A and Class AB Modes Selectable
- The menu provides options including Class A or Class AB amplification.
- One device, two distinct sound styles.
- Class A offers a warm, smooth sound, while Class AB delivers a lively sound.
Note: Since Class A generates more heat, only Class AB is available when using battery power.
Coupled Capacitors Matter
- Carefully selected Audio Note Kaisei electrodeless electrolytic capacitors are used.
- Expensive, but they give the sound a refined, noble character pleasant and enduring.
- The sound is delicate, rich, full, slightly warm, and smooth.
- Parallel connected with WIMA MKP10 film capacitors.
- They enhance high-frequency extension while maintaining a more balanced and stable sound.
- The "rare" sound performance reflects an uncompromising pursuit of quality.
MUSES72323 Program Control of Analog Volume
- Each of the two channels uses a separate MUSES72323 chip, reducing crosstalk between channels.
- With noise as low as 0.63uV, only 1/4 of that of the PGA2311UA, it suits both earphones and large headphones.
- An ultra-low distortion of 0.00024%, with program control analog switching, ensures lossless sound quality.
- It offers fine adjustments in 0.25dB steps, with a wide range from 0 to -111.75dB, for precise control.
- At low volumes, the sound quality remains intact, with no left-right imbalance. The electronic control ensures long-lasting durability.
Noise Comparison
Why does a good headphone amplifier reveal more sound details?
- It's not that the amplifier "creates" new sound details out of nothing.
- But rather, it optimizes design so that existing details can be fully revealed.
- It's like wiping dust off a painting to recover the vivid details and colors.
- The signal might lose details at each stage of its path.
- From circuit design, objective parameter guarantee, power supply, to component selection.
- Down to the smallest resistor, PCB material, internal signal wires, operational amplifiers, and soldering.
- They all have to ensure that no musical note is lost.
- The R&D phase of QH1 was like a battle to protect sound details.
- It is this meticulous craftsmanship that gives QH1 its high-density sound.
Audiophile Matching Cables
- In case that users might affect sound quality with their own signal cables.
- QH1 carefully selects cables to create XLR signal cables for audiophiles.
- The separate power supply also comes with audiophile aviation cable s and DC cables.
- No hassle for the user, just simple and great sound.
Note: Longer or alternative signal cables can be purchased separately.
Available for Preamp Output
- The preamp output offering the same high performance as the headphone amplifier.
- The single-ended output impedance: 47 , and the balanced output impedance: 94 .
- Optimized for active speakers, delivering a natural and expansive sound.
- Independent volume memory (selectable in 200 steps).
- With an infrared remote control for more convenient operation.
Four Input Methods
- Equipped with RCA and XLR inputs for desktop use.
- Along with 3.5mm single-ended and 4.4mm balanced inputs.
- Easy connection with portable players.
Note: Input and cannot be connected to signal sources at the same time, the same applies to and .
Three Power Supply Options
- Dedicated aviation connector for the separate power supply, with three sets of analog and digital isolated voltage inputs.
- The DC port supports 12V universal linear or switching power supply input.
- The internal battery provides 8-16 hours of clean power for a pure listening experience.
- All these three power supply options allow for exploring more sound possibilities and greater versatility.
Reasons for a Desktop Headphone Amp to Have a Built-in Battery
- When mains power is interfered and affects sound quality, switch to the built-in battery for a pure power supply.
- No more staying up late just to enjoy clean sound enjoy every moment of music anytime.
- When testing out different peripherals, battery power acts as a "touchstone."
- A portable desktop amp enables high-quality music enjoyment at any time, from anywhere.
- No more overpowering sound from desktop amps delicate and refined sound for small earphones.
- A battery-powered preamp makes audiophiles' dreams come true.
Built-in Battery Power Comparable to Separate Power Supply
- Low internal resistance power battery with 40A current output capability.
- Multi-MOSFET parallel protection circuit with internal resistance as low as 5 milliohms.
- Using Linear 's industry-leading boost converter in combination with Panasonic power inductors.
- The battery-powered unit can provide 15V analog power similar to a separate power supply.
- The full-link low internal resistance design ensures high current output even at high voltages.
Solid Aluminum CNC Housing
- Integrated housing with 18 screws tightly securing the bottom plate.
- The high-density integrated structure ensuring excellent shock and vibration resistance.
- Worry-free vibration isolation, allowing for the safe stack of equipment.
- Thick, fully enclosed housing with precisely spaced seams blocked.
- The shielding function, keeping interference completely out.
Comprehensive Headphone Protection Circuit
- Output DC protection with a low threshold of 0.3V.
- Optimized specifically for IEMs (in-ear monitors).
- Headphone impact protection circuit for power on/off.
- Three major intelligent protections: over-temperature, overload, and DC.
- Continuously guarding your headphones.
Three Gain Levels, Featuring
- Low, Medium, and High gain levels with quick menu switching.
- Flexible matching for different headphones, easily handling both headphones and earphones.
- High gain provides up to 12 times voltage amplification, adding vivid and dynamic performance for high-impedance headphones.
- Low gain offering extremely low noise output, optimized for IEMs (in-ear monitors).
Touchscreen Operation
- Menu operated via a clear and convenient touchscreen interface.
- Independent volume control knob for more precise and timely adjustments.
- One-touch mute for elegant handling in various situations.
Dedicated Linear Power Supply
- The design philosophy based on the "Always Aiming for the Better" approach.
- Ample current reserve to reduce power supply impedance and minimize output ripple.
- Irish Talema low-impedance 80W toroidal transformer dedicated to analog circuits.
- Independent transformer for control and display, isolated from the analog power ground.
- LT1084/1033 in replacement of conventional 317/337, to achieve superior ripple suppression and lower power output noise, although the cost is several times more expensive.
- Philips, Sprague electrolytic capacitors, WIMA , Siemens, and ERO film capacitors.
- Full-range noise filtering and high-speed energy storage for low, mid, and high frequencies.
- Pure, low-impedance, high-transient power supply delivers an overwhelming sense of sound spaciousness.
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Technical Specifications
Balance Port
Single Port
Input Level
2~16Vrms @ 15V
2~8Vrms @ 8V
2~8Vrms @ 8V
1~8Vrms @ 15V
1~4Vrms @ 8V
1~4Vrms @ 8V
Gain
0dB/6dB/21dB @BAL IN
6dB/12dB/27dB @SE IN
6dB/12dB/27dB @SE IN
-6dB/0dB/15dB @BAL IN
0dB/6dB/21dB @SE IN
0dB/6dB/21dB @SE IN
Output Impedance
100K ohm
100K ohm
THD+N
0.00011%
0.00017%
Dynamic Range
127dB
121dB
Output Power QH1-LPS Powered
9000mW + 9000mW @16
8000mW + 8000mW @32
1000mW + 1000mW @300
8000mW + 8000mW @32
1000mW + 1000mW @300
3500mW + 3500mW @16
2000mW + 2000mW @32
270mW + 270mW @300
2000mW + 2000mW @32
270mW + 270mW @300
Output Power Battery Powered
6000mW + 6000mW @32
1000mW + 1000mW @300
1000mW + 1000mW @300
2000mW + 2000mW @32
270mW + 270mW @300
270mW + 270mW @300
THD+N
127dB
121dB
HP Output Impedance
< 0.4 ohm
< 2 ohm
Preamp Output Impedance
94 @XLR
47 @RCA
Output Level
17.5Vrms @ 15V
8.2Vrms @ 8V
9Vrms @ 15V
4.3Vrms @ 8V
Noise Floor
3.5uVrms @Gain:L
4.5uVrms @Gain:M
25uVrms @Gain:H
3.0uVrms @Gain:L
3.5uVrms @Gain:M
20uVrms @Gain:H
Support Headphone Impedance
8 - 600 ohms
8 - 600 ohms