McIntosh C28

Specification
● 형식 : 프리앰프
● 크기(W x H x D/mm) : 16" x 5-7/16" x 13"
● 무게 : 25파운드
● 주파수 응답: 20-20kHz (+0 -0.5dB)
● Distortion 0.1%.
● Noise and hum -90dB aux, -78dB phono.
● Output rated : 2.5V.
● Output impedance : 100 Ω
● Load impedance 47kΩ
● Input sensitivity & impedance:
aux 0.25V at 250kΩ, 2mV at 47kΩ, mic 2.5mV at 500kΩ.
● Tone controls:
bass +20dB to -20dB, treble +18 to-18dB.
● Center channel output 1.25V.
● Headphone amplifier 0.75V at 8 Ω
● 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.
● 출시년도 : 1970-1978
● 출시가격 :
미국 : $649.00
● 기타 :
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 in! dicator 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.