McIntosh C28

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ELECTRICAL: Response 20-20kHz (+0 -0.5dB). Distortion 0.1%. Noise and hum -90dB aux, -78dB phono. Output rated 2.5V. Output impedance 100 ohms. Load impedance 47k. Input sensitivity & impedance: aux 0.25V at 250k, 2mV at 47k, mic 2.5mV at 500k. Tone controls: bass +20dB to -20dB, treble +18 to-18dB. Center channel output 1.25V. Headphone amplifier 0.75V at 8 ohms. LF filter 50Hz at 12dB/octave. HF filter 7kHz at 12dB/octave. Bass trim controls boost up to 6dB below 100Hz. Voltage gain 20dB aux, 62dB phono.

FRONT PANEL: Glass panel. Illuminated. Balance, Comp: pres, flat loud. Input selector with indicator lights: aux, tuner, phono 1, and phono 2, mic, tape hd. Mode selector with indicator lights: L to L+R, R to L+R, stereo rev, stereo, mono (L+R), L+R to L and L+R to R. Volume with power switch. Separate treble and bass controls each channel. Pushbutton switches with indicator lights: tape 1 and tape 2, tape copy: 1 to 2 or 2 to 1, Filters: LF, HF. Speaker off: main, remote. Headphone jack, Tape input jack, Tape output jack.

TOP PANEL: Bass trim, Headphone level, output level, phono 1 and phono 2 level controls, center channel level, power amp switch: on or off.

BACK PANEL: Speaker remote control socket. Inputs: aux, tuner, tape 1, tape 2, tape head, mic, phono 1 and phono 2. Outputs: center, main (2 pair), tape 1 and tape 2, line. Ground binding post. AC outlets: 4 switched at front panel, 2 switched at top panel, 1 unswitched. Fuse, Panloc mounting.

Size 5-7/16"H, 16"W and 13"D behind panel. Weight 25 lb. Sold from 1970-1978.