LIO Headphone Amplifier

The LIO Headphone Amplifier is a great choice for serious listeners who demand high resolution, ultra-low noise and deep musical involvement from their headphone listening. It all starts with LIO’s patent-pending “PURE-DC-4EVR” ultracapacitor power supply that completely isolates all audio circuitry from the AC mains power at all times – for the dead-silent background necessary for the most revealing, detailed and life-like headphone listening experience available today.

LIO Headphone Amplifier accommodates either unbalanced or balanced headphones and offers three performance levels of volume control / tube linestage to meet your specific performance and budget desires. LIO signals the end of obsolescence and the rebirth of lasting value. LIO takes a modular approach, allowing owners to enjoy the benefits of additional features and future technologies effortlessly and economically.

Since its introduction, LIO has earned a fanatical customer following and rave reviews for its revolutionary design and deeply musical, spacious, and engaging way of delivering music.

It is rare to find a headphone amplifier that offers a seductive presentation, awesome dynamics, and ultra-high resolution, along with the ability to drive such a wide range of headphones. The LIO Headphone Amplifier will keep you listening in your private world and enjoying every minute!

Ultracapacitor Power Supply

LIO’s patent-pending, ultracapacitor power supply (“PURE DC-4-EVR”) completely isolates all audio circuitry from the noise and voltage fluctuations of AC mains power – without the need for an external power conditioner. Music flows from LIO in the most natural way, free of grain and background noise. Its vanishingly low output impedance ensures the highest possible current to deliver stunning transient attack with bass that is extended and impactful, yet tight and well defined.


Inputs and Outputs

Three line-level stereo inputs with Cardas rhodium-plated RCA jacks.

Your choice of single-ended (1/4” – 6.3mm) or balanced (4-pin XLR) output jack.

One “fixed” level, and two “variable” output pairs of Cardas RCA jacks. One pair of variable outputs can drive an external power amplifier or a powered subwoofer, while the fixed output can feed any audio recording device or any outboard audio component with a volume control.


Linestage

The linestage is at the heart of LIO Headphone Amplifier, and we offer three performance levels:

Level 1: Resistor Volume Control (RVC) with TUBESTAGE (included in base price)

Level 2: Autoformer Volume Control (AVC) with TUBESTAGE (+$1005)

Level 3: DHT PRE (+$4805)

Remote Control Handset

A premium, solid aluminum remote control handset gives you convenient mastery of every function.


Industry-leading 10-year Warranty

Made in the USA
Specifications:
LIO Headphone Amplifier (with standard RVC and Tubestage)
Dimensions: Approx. 17.5″ wide x 13.5″ deep x 4.5″ tall (445mm x 343mm x 114mm)
Inputs: (3) unbalanced analog pairs (RCA), Balanced XLR inputs also available +$100
Outputs: (1) 4-pin XLR balanced, OR (1) 1/4″ single-ended headphone output jack
Headphone Output Power (SE): 1W into 32-ohm
Headphone Output Power (BAL) 2W into 32-ohms
Headphone Output Impedance (SE and BAL): < 1 ohm
Headphone Impedance Range: 8 – 600 ohms
Headphone Frequency Response: 5Hz – 50kHz (+/- 1dB)
Volume Control: Vishay/Dale film resistors
Volume Steps: 64 discrete 1dB volume control steps
Included Tubes: JJ E88CC (matched pair)
Accepted Tubes: 6922/E88CC, 6DJ8/ECC88, 7308/E188CC, 7DJ8/PCC88, 6N23, 6H23, 6N11, and 6GM8
External Power Adapter: 100 – 240Vac, 50/60Hz. Detachable IEC power cord
Shipping Weight: approximately 25 lbs. (11.4 g)
Optional AVC Tubestage
Volume Control: Hand-wound autoformers
Volume Steps: 64 discrete 1dB volume control steps
Attenuation Range: -54db to +7db
Included Tubes: JJ E88CC (matched pair)
Accepted Tubes: 6922/E88CC, 6DJ8/ECC88, 7308/E188CC, 7DJ8/PCC88, 6N23, 6H23, 6N11, and 6GM8
Output Impedance: 200 ohm
Frequency Response: 10Hz – 110kHz (+/- 0.5 dB)
Gain: +7 dB
Optional DHT PRE Tubestage
Volume Control: NUDE RVC stepped Vishay Nude Z-Foil resistors in 64 discrete 1dB volume control steps
Gain: Approx. 6 – 9 dB (depending on tube used)
Frequency Response: From 10Hz to >250kHz (+/- 0.5dB), ultra-high bandwidth design
External linear DC power supply dimensions: 6.5″ wide x 9.0″ deep x 3.75″ tall
Power Supply Weight: 10 lbs
Optional Phonostage
Phonostage Gain / Load (MM): 40dB / 47k
Phonostage Gain / Load (MC): 60dB / 16 load settings from 26 to 400 Ohms (with Remote Cartridge Loading option, load choices increase to 255 individual settings from 5 to 2000 Ohms)
RIAA: Passive filter between two discrete, Class A JFET gain stages
Voltage Gain Stages: Class A, JFET, no feedback
Optional DSD/PCM DAC
DAC Bit Rates Accepted (PCM): 16, 24, 32
DAC Playback Sample Rates (PCM): 44.1, 48, 88.2, 96, 176.4, 192, 352.8, and 384kHz
DAC Playback (DSD): DSD64, DSD128 via DoP
Output Voltage (SE): 8 – 600 ohms
Output Impedence (SE): 2.0V rms

LIO signals the end of obsolescence and the rebirth of lasting value. The LIO HPA takes a modular approach, allowing owners to enjoy the benefits of additional features and future technologies effortlessly and economically.

For even more functionality, musical enjoyment and value, consider adding these high performance modules to your LIO HPA, now or anytime in the future:


LIO DSD/PCM DAC (+$895)

LIO PHONOSTAGE (+ $895)