PS Audio 4.6 preamplifier Specifications

Sidebar 2: Specifications

Description: Solid-state stereo preamplifier. Phono inputs: MM & MC. High-level inputs: 5. Separate tape control. Ability for 1 external loop. Frequency response: 10Hz–20kHz ±0.1dB. RIAA accuracy: 0.1dB or better. Input impedance: adjustable (100k ohms standard) (phono), 10k ohms (high-level). Input capacitance (phono): 150pF. Input overload: 160mV (MM), 10mV (MC), 2V (line). Distortion 0.01% or better. Maximum output voltage: 18V rms. Output impedance 50 ohms in active, variable in straight wire with maximum of 10k at lowest volume. S/N ratio MM: 82dB A-weighted. MC: 78dB A-weighted (5mV reference). High level: 100dB A-weighted (active), unmeasurable (straight wire). Power supply: remote.
Dimensions: 19" W by 2" H by 7" deep (plus external power supply transformer, approximately 4.5" W by 3.5" H by 4.5" D). Weight: 5 lbs (estimated).
Price: $659 (1988); no longer available (2014).

Optional M-500 Power supply: 500VA.
Dimensions: 7" W by 4.5" H by 9" D. Weight: 10 lbs (estimated).
Price: $495 ($445 with standard supply in trade); no longer available (2014).

Common to both:
Approximate number of dealers: 120.
Manufacturer: PS Audio, San Luis Obispo, CA 93401 (1988); PS Audio, 4826 Sterling Drive, Boulder, CO 80301. Tel: (720) 406-8946. Fax: (720) 406-8967. Web:

PS Audio
4826 Sterling Drive
Boulder, CO 80301
(720) 406-8946

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