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The ultimate analog preamplifier
“It’s the most transparent preamp – or audio component of any sort – that I’ve heard.”
– Brian Damkroger, Stereophile
 
Our most advanced preamplifier to date
“This is a rare component in the way it disappears, revealing nothing but the music carried through it. I’ve yet to hear one that reveals more music.”
– Jeff Dorgay, TONEAudio
 
Sophisticated two chassis design
The audio circuits are isolated within a second box for better signal accuracy
 
Suspension for complete microphonic annihilation
giving incredibly lifelike natural sound.
 
Design features
2-chassis design with 1 chassis housing the power supply, digital controller circuitry, software processing & the LED display. The other chassis contains ONLY audio circuitry.
Power supply voltage regulation includes i 2 DCf (Independent Inductive DC Filtering); 1 inductor for each and every IC in the audio circuit’s signal path – 40 stages in all.
Gain offset adjustment of ±10dB for each line input.
Each line input is fully configurable to be “home theater ready”, whereby the 850P’s volume control is bypassed.
 
Specifications
Number of inputs - XLR / RCA
3 pairs / 5 pairs
Input Sensitivity
200mV - 4.0V RMS
Input Impedance
11,000Ω
Gain
9dB
Number of Outputs - XLR / RCA
2 pairs / 2 pairs (fixed + variable)
Signal-to-noise Ratio (20Hz-20kHz)
130dB @ full output
Frequency response
5Hz - 100kHz ±0.1dB
Crosstalk @ 1kHz
-130dB
Output impedance
50Ω
THD (20Hz - 20kHz)
0.0005%
Intermodulation distortion
0.0001%
Shipping weight
151 lb / 67 kg
Dimensions - each chassis (w x h x d)
18.75 x 4.0 x 16.5 in
47.6 x 10.2 x 41.9 cm