Audible illusions Modulus 3B Stereo Preamplifier



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Overall Gain: 58dB at 1kHz

Tube Compliment: 4-6922 or 6H23EB twin-triodes, graded & matched

Weight: 20.5 lbs, 24 lbs (shipping weight)

Dimensions: 19″W x 3.5″H standard rack Chassis is 17″W x 11″D x 3″H Power Supply, 6″W x 10″D x 5″H

Muting:45 second warm-up and automatic brown-out protection 45 watt maximum.

6 foot IEC Line Cord, supplied



Gain: 28dB at 1kHz

Frequency Response: +/- .25dB of RIAA from 20hz to 20kHz

Signal Phase: Non-Inverting

Signal to Noise: 74dB below a 5mV input wideband

Distortion: Less than .015% at 20 kHz

Input Impedance: 47 kOhms

Phono Overload: 1.2v rms at 1 kHz (100k load) 750mv rms at 1 kHz (IHF load)



Gain: 30dB, Tape & S/S Processor 0dB

Frequency Response: Within +/-1 dB 2Hz to 100kHz measured w 1-1 probe (50 kOhms, 100pf load)

Signal to Noise: 90dB below 1.5V rms output wideband

Input Impedance: 50kOhm – all

Output Impedance: Main-1.2 kOhms, Tape-150 Ohms

Distortion: .10% at 1.5V rms, 20-50 kHz, into 50kOhm load. Less than .12% THD at 1v out into IHF load

Signal Phase: Main Outputs – Inverting

Tape Outputs – Non-Inverting

Maximum Input: 9v rms.

Available Colors: Black / Silver