Tube Preamp Reviews

Description: Full-function, tubed preamplifier with five line-level inputs, two tape loops, and one phono input. Tube complement: 2x12AX7, 3x5751, 2x5965. Frequency range: 2Hz–100kHz. RIAA error: ±0.25dB. Input impedance: 47k ohms in parallel with 100pF (phono), 47k ohms (line). Output impedance: less than 200 ohms (main). Phono stage gain: 47dB. Line stage gain: 31dB (polarity-inverting). Rated output level: 2.5V (20V peak maximum). Phono overload: greater than 200mV at 1kHz. Distortion: THD less than 0.25%, IMD less than 0.25%. S/N ratio (20Hz–20kHz): 77dB ref. 10mV input (phono), 85dB ref. 2.5V output (line).
Dimensions: 19" W by 14.25" D by 5.25" H. Weight: 20 lbs.
Price: $2950 (1989); no longer available (2008). Number of dealers: 72.
Manufacturer: Conrad-Johnson Design, 2733 Merrilee Drive, Fairfax, VA 22031. Tel: (703) 698-8561. Fax: (703) 560-5360. Web: www.conradjohnson.com.