McIntosh MC3500 Monoblocks (98 sets ever made)

Manufacturer’s specs

Description
SPECIFICATIONS: MC-3500
ELECTRICAL:

350W RMS continuous. 500W RMS Maximum.

Frequency Response: 20-20kHz (+0 -0.5dB).

Total Harmonic Distortion: 0.15%.
Intermodulation Distortion: Unmeasureable – ie behold measuring instrument threshold

Hum and Noise Levels: -95dB.

Output – Rated Load Impedances: 1, 4, 8, 16, 50 and 64 ohms.
Note: Rated Power Output for 1 ohm load is 300W and 4 Ohm load is 320W
Output Load Circuits: Can be isolated from ground – ie “balanced output”.

Internal impedance: less than 5% of Rated Load Impedance.
Input impedance: 200k.
Input sensitivity 1.1V RMS

FRONT PANEL:
Anodized gold and black panel. (Note: Some after-market replacement panels were supplied in natural aluminium anodised finish).
Input connectors: RCA and BNC (front and rear).
Gain control.
Meter Range switch: off, volts, dB, dB-10 or V1-V8.
Power circuit breaker: on or off.
Output range switch: 1 , 4, 8, 16, 50, and 64 ohms with corresponding voltages 17.3, 35.8, 53.0, 75.0, 132 and 150V.
Dual banana output connectors.
Meter: Monitors output voltage, dB or cathode current for each output tube.
Heavy duty drawer-pull style handles.
BACK PANEL:
Line voltage switch: 117 or 125V.
Output barrier strip.
Input terminals.
Sub sonic filter switch: In or out.
Cooling fan.

TUBES:
8-6LQ6/6JE6B output,
2-12AX7/ECC83,
2-6DJ8/ECC88,
6CG7/6FQ7
6BL7GTA.
Solid state full-wave bridge rectifier.

DIMENSIONS: 482.6 mm Wide rack mounting x 266.7 mm High x 431.8 mm  Deep behind front panel.

WEIGHT: 56.6 kg

POWER CONSUMPTION:
400W at zero signal
900W at maximum signal

MANUFACTURE:
Sold from 1968-1971.
1971 retail price USD$1099.00