McIntosh C31V (1987–1989)

A late-1980s audio/video control center preamplifier with remote-controlled input selection and a 5-band equalizer.

Overview

The McIntosh C31V AUDIO/VIDEO CONTROL CENTER is a preamplifier made by McIntosh Labs between 1987 and 1989. It functions as an AV control amplifier with both audio and video input/output switching, and includes remote control capability for source selection and operation of compatible McIntosh components like the MCD7005 and MR7082. The unit features a 5-band continuously variable equalizer, loudness control, and high/low filters, designed to tailor audio playback to listener preference and room acoustics.

Specifications

Frequency response	20 Hz ~ 20 kHz +0, -0.5 dB
Maximum output voltage (Main/Tape)	8 V (20 Hz to 20 kHz)
Total Harmonic Distortion (THD)	0.007% maximum (1.5 V rated output, 20 Hz to 20 kHz)
Input sensitivity (Phono)	2 mV for 1.5 V output (0.66 mV, IHF)
Input sensitivity (High Level)	200 mV for 1.5 V output (66 mV, IHF)
Input impedance (Phono)	47k Ω (65 pF)
Input impedance (High Level)	22k Ω
Maximum Input Voltage (Phono)	90 mV
Maximum Input Voltage (High Level)	10 V
Signal-to-Noise Ratio, A-Weighted (Phono)	90 dB (at 10 mV input; 84 dB IHF)
Signal-to-Noise Ratio, A-Weighted (High Level)	98 dB (at rated output; 86 dB IHF)
Gain (Phono → Tape)	40 dB
Gain (Phono → Main)	62 dB
Gain (High Level → Tape)	0 dB
Gain (High Level → Main)	17.5 dB
Equalizer	5-band, ±12 dB continuously variable (center frequencies: 30, 150, 500, 1500, 10000 Hz)
AC outlet (Interlocking)	1 system (Black Socket)
AC outlet (Non-Interlocking)	1 system (Red Socket), 1200W max combined
Power requirements	100 VAC, 50Hz/60Hz
Power consumption	25W
Dimensions (Body)	406 mm (W) x 138 mm (H) x 330 mm (D) (including Panlock)
Front Panel Knob Depth	32 mm
Weight	7.5 kg

Design

The front panel has a two-tone design: the top section is black glass with gold/green illumination, and the bottom is black anodized aluminum. The chassis is finished in black. The unit includes remote control functionality for audio and video input/output selection and can operate connected MCD7005 or MR7082 devices. It features a stereo 5-band program equalizer, continuously variable loudness control, and high- and low-frequency filters.

Market

The McIntosh C31V had a last retail price of $1895. Used units have been listed recently at prices ranging from $600 to $2,590, reflecting condition and market demand.