LIO Preamplifier

LIO Preamplifier is an entirely new and utterly unique component showcasing game-changing technology, future-proof flexibility, exceptional value, and unequaled audio performance. We designed it for the listener seeking the highest level of musical purity, with long-term ownership and future innovation in mind.

LIO allows you to enjoy your music collection on a whole new level – one with less complexity, less clutter, fewer components and cables for a purer, more direct and deeper emotional connection to your music. Music is presented against a black void of silence to reveal every iota of musical truth. Its transparency, vast spaciousness and visceral impact have left listeners awestruck.

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.

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

Ultracapacitor Power Supply

LIO’s patent-pending, ultracapacitor power supply (“PURE DC-4-EVR”) isolates 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.  Now featuring our Silent Switching technology!


Inputs and Outputs

The LIO Preamplifier features three line-level stereo inputs with Cardas rhodium-plated RCA jacks. Outputs include 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. Input and output modules with balanced XLR connectors are also available.


The linestage is at the heart of LIO Preamplifier, 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)

Industry-leading 10-year Warranty

Made in the USA



LIO Preamplifier (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: (2) variable output and (1) fixed output unbalanced analog pairs (RCA), Balanced XLR ouputs also available +$100
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
Output Impedance: < 200 ohm
Frequency Response: 10Hz – 110kHz (+/- 0.5 dB)
Gain: Unity (0dB)
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
Volume Control: NUDE RVC stepped Vishay Nude Z-Foil resistors
Volume Steps: 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
Optional Headphone Amplifier
Headphone Output Power (SE): 1W into 32-ohms
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)/td>
Gain: 0dB / 12dB (set via jumper)

For even more functionality, musical enjoyment and value, consider adding these high performance modules to your LIO Preamplifier: