We are offering an M3B-1, New in the box Add an AudioQuest Braided Tornado power cable for only $695.00 to elevate this unit's performance. Thirty years ago, Audible Illusions began production of the first Modulus preamplifier, a component that set new standards for sonic performance and reliability. To date, over 20,000 Modulus preamps have been manufactured, with more than 150 excellent product reviews from audio critics worldwide. Adhering to our circuit design philosophy that “simpler is better” and based on the proven superiority of single-ended, triode-tube designs, our engineers have continuously refined the preamp. It would be challenging to list all the innovations introduced by our designs. The elimination of cathode followers, buffers, and negative feedback, paralleling tube output stages, designing new Teflon film capacitors, and exploring better mechanical interfaces are but a few innovations that have made Audible Illusions a pioneer in modern-day tube technology. Compared to previous generations, the new M3B adds a host of features and refinements. Circuit boards have been redesigned to simplify the signal path further, improve switching, and reduce vibration. This latest design utilizes special direct relay switching, resulting in improved definition. Today, the M3B is one of the few full-function preamplifiers made. For vinyl record and CD lovers alike, this preamp offers unparalleled musical performance. It is the finest preamplifier we have ever made and continues to be the benchmark by which many others are compared. 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. and Mirror-Polished Nickel-Silver Faceplates are 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. The 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. Completely handcrafted in the USA. GENERAL 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 rackChassis is 17″W x 11″D x 3″HPower Supply, 6″W x 10″D x 5″H Muting:45 second warm-up and automatic brown-out protection Power Requirements: 115-125VAC, 60Hz45 watts maximum. 6-foot IEC Line Cord, suppliedOptional 100, 220, 230, 240 50-60Hz transformers. 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 dB2Hz to 100kHz measured with 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 the IHF load Signal Phase: Main Outputs – InvertingTape Outputs – Non-Inverting Maximum Input: 9V RMS.
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