McIntosh C28 stereo preamplifier- full function, in good working condition, with copy of manual
Response 20-20kHz (+0 -0.5dB)
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
Size 5-7/16"H, 16"W and 13"D behind panel
Weight 25 lbs
The controls on the front panel are as follows: Balance, Comp: Presence, 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 for each channel.
Pushbutton switches with indicator lights: Tape 1 and Tape 2, ape copy: 1 to 2 or 2 to 1
Filters: LF, HF.
Speaker off: Main, Remote.
Jacks: Headphone jack, Tape input jack, Tape output jack.