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Audible Illusions Modulus 3B Preamplifier

SKU / Model: N/A
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Reference Price / Est.
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Product Description
Brand Audible Illusions
Model Modulus 3B
Type Preamplifier
Condition Used, Excellent condition

Package includes:

  • Audible Illusions Modulus 3B Preamplifier
  • AC adapter
  • Power cable
  • Manual
  • Original box
  • 30-day money back guarantee

Control Functions: Dual-Mono Left & Right Stepped Attenuator Volume Controls, Subsonic Filter, Tape-Source, Stereo-Mono, Muting, On-Off.
Input Selection: CD, DVD, Phono, Tuner, Video, Auxiliary, Tape
Output Selection: Main (2) Tape
Optional: Internal, gold-plated L&R channel circuit boards for low-output M/C cartridges. Rack Mt.Faceplates available as a special order.

Features:

  • Circuit Design is Dual-Mono, Class A, Single-Ended Triode, Open Loop.
  • External Power Supply, housing three separate supplies, prevents unwanted AC induced distortions.
  • Main Chassis has five separate, fully-regulated FET power supplies in addition to separate filament supplies.
  • Audio Circuit has No Cathode Followers or Buffers.
  • Standby Soft-Start Circuit prolongs tube life and circuit components.
  • Automatic-Timed Muting.
  • Control Knobs have Low-Light Backlit Illumination.
  • Separate Volume Controls are Precision Stepped Attenuators.
  • Proprietary gold-plated RCA Jacks with Teflon Insulators.
  • All circuit boards are Hand-Soldered with silver-bearing solder.
  • All Polypropylene, Teflon, and Polystyrene capacitors are Proprietary Designs.

Modulus 3B Specifications

PHONO SECTION
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)
HIGH LEVEL SECTION
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.
GENERAL
Overall Gain 58dB at 1kHz
Tube Compliment 4-6922 or 6H23EB twin-triodes, graded & matched
Muting 45 second warm-up and automatic brown-out protection
Power Requirements 115-125VAC, 60Hz ; 45 watt maximum. 6 foot IEC Line Cord, supplied ; Optional 100, 220, 230, 240 50-60Hz transformers.
Dimensions (W x H) 19” x 3.5” standard rack
Weight 20.5 lbs, 24 lbs (shipping weight)