Conrad-Johnson Premier Seven preamplifier Specifications

Sidebar 2: Specifications

Description: All-tube dual mono preamplifier. Controls: Source (Phono, Tuner, CD, Tape 1 & 2), Record (Phono Tuner, CD, Tape 1 & 2), Level, AC Power. Inputs: Phono (MC or MM), Tuner, CD. Outputs: Main 1 & 2. Gain: 40dB phono, 29dB line. Phono load resistances: 70, 100, 150, 250, 470, 1k, 2k, 5k, 10k, and 47k ohms. Phono overload: 150mV at 1kHz. Max output: 20V RMS. Frequency range: 2Hz to more than 100kHz (bandpass). RIAA EQ accuracy: ±0.25dB, 20Hz–20kHz. Hum & noise: –80dB ref. 10mV input (phono), –88dB ref. 2.5V out (line). Output impedance: less than 200 ohms. Distortion at 1V output: less than 0.25% THD and IMD.
Dimensions: Audio section 7" H by 19" W by 16" D; power supply 31/2" H by 19" W by 153/4" D. Shipping weight: 60 lbs.
Price: $7850 (1988); no longer available (2008). Approximate number of dealers: 150.
Manufacturer: Conrad-Johnson design, 2733 Merrilee Drive, Fairfax, VA 22031. Tel: (703) 698-8581. Fax: (703) 560-5360. Web:

Conrad-Johnson design
2733 Merrilee Drive
Fairfax, VA 22031
(703) 698-8581

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