Audible Illusions Modulus 3B preamplifier
AUDIBLEILLUM3B- Product Info
AUDIBLE ILLUSIONS MODULUS 3B PREAMPLIFIER
- The finest full function preamp Audible Illusions has ever made.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 over150 excellent product reviews from audio critics around the world.
Adhering to their circuit design philosophy that "simpler is better" and based on the proven superiority of single-ended, triode-tube designs, Audible Illusions engineers have continuously refined the preamp. To list all the innovations brought forth by our designs would be difficult. The elimination of cathode followers, buffers, negative feedback, paralleling tube output stages, designing new Teflon film capacitors and exploring better mechanical interfaces are but a few innovations that has 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 further simplify the signal path, 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: (1) Internal, gold-plated L&R channel circuit boards for low-output M/C cartridges; (2) Rack Mount; (3) Mirror-polished nickel-silver faceplates available as a special order
○ M3B 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
- Completely handcrafted in USA- Specifications
- Audible Illusions M3B Specifications
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 rack
- Dimensions: 19″W x 3.5″H standard rack; Chassis 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
- Power requirements: 115-125VAC, 60Hz 45 watt maximum; 6 foot IEC Line Cord, supplied; Optional 100, 220, 230, 240 50-60Hz transformersPhono Section
- Gain: 28dB at 1kHz
- Frequency response: ± .25dB of RIAA from 20hz - 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
*Specifications subject to change without notice*