Single Channel M1 Preamp Module
Including VU-1 metering and the John Hardy 11C line output transformer

The M-1 Mic Preamp is among the finest mic preamps in the world. It provides the accuracy and transparency that is missing in other mic preamps. No matter what your application, the M-1 will provide superior sound quality. The world's best input transformer (Jensen JT-16-B), best op-amp (990 discrete op-amp) and the elimination of all capacitors from the signal path combine to provide the highest performance.
 
The M-1 has a 19" wide mainframe rack-mount chassis (1.75"H x 19"W x 8"D) and can be ordered with 1 to 4 channels. There are two meter options and the John Hardy 11C line output transformer is also available as an option. Additional channels and options can be easily added later up to the total capacity of the mainframe.
 
The M-1 was introduced in 1987 and while sonically identical to the M-2 there are a few control differences. The M-1 has a two-section gain-pot providing continuously variable adjustment in two overlapping ranges that are selected by the "HIGH GAIN" switch. (The M-2 has a 16 position gain-switch with 1% metal-film resistors providing accurate and repeatable gain settings. Since the "HIGH GAIN" switch isn't necessary, the M-2 is available with either a "20 OHM MIC" switch OR a "20dB PAD" switch).
 
Options
- VU-1 - Very accurate and informative 20 segment LED meter card with separate peak LED for monitoring preamp output
- PK-1 - Peak LED metering only (not required if VU-1 is installed)
- John Hardy 11C line output transformer
- Pin 2 Or pin 3 high - can be ordered either way and internal jumpers make changes in the field easy