McIntosh MA6500 Service Manual

PREFORMANCE SPECIFICATIONS
POWER OUTPUT, STEREO
250, 200, 120 watts minimum sine wave continuous
average power output per channel, both channels operat-
ing, into a load impedance of 2, 4 and 8 ohms respec-
tively.
TOTAL HARMONIC DISTORTION
0.005% maximum at any power level from 250 milliwatts
to rated power per channel from 20Hz to 20,000Hz, both
channels operating.
INTERMODULATION DISTORTION
0.005% maximum if instantaneous peak power output per
channel does not exceed twice the rated output with both
channels operating for any combination of frequencies
from 20Hz to 20,000Hz.
OUTPUT LOAD IMPEDANCE
2, 4 or 8 ohms
RATED POWER BAND
20Hz to 20,000Hz
DYNAMIC HEADROOM
2.4dB at 2, 4 or 8 ohms
DAMPING FACTOR
60 at 2 ohms
120 at 4 ohms
230 at 8 ohms
FREQUENCY RESPONSE
+0, -0.5dB from 20Hz to 20,000Hz
SIGNAL TO NOISE RATIO, (A WEIGHTED)
Phono Input: 90dB (84dB IHF) below 10mV input
High Level: 100db (90dB IHF) below rated output
Power Amplifier: 110dB below rated output
SENSITIVITY
Phono: 2.5mV for 2.5V rated output (0.5mV IHF)
High Level: 250mV for 2.5V rated output (50mV IHF)
Power Amplifier Input: 2.5V for rated output
INPUT IMPEDANCE
Phono: 47k ohms, 65pF
High Level: 22k ohms
MAXIMUM INPUT SIGNAL
Phono: 90mV
High Level: 8V
POWER REQUIREMENT
120V, 50/60Hz, 5.0 Amps UL/CSA
230V, 50/60Hz, 2.5 Amps
PREAMPLIFIER MAXIMUM VOLTAGE OUTPUT
Phono: 90mV at tape output
High Level: 8V at tape output
Main Out: 8V at preamp output
VOLTAGE GAIN
High Level to Tape: 0dB
High Level to Main: 20dB
TONE CONTROLS
Bass Control: +/-12dB at 20Hz
Treble Control: +/-12dB at 10kHz
POWER REQUIREMENTS
100 Volts, 50/60Hz at 4.8 Amps
110 Volts, 50/60Hz at 4.4 Amps
120 Volts, 50/60Hz at 4.0 Amps
220 Volts, 50/60Hz at 2.0 Amps
230 Volts, 50/60Hz at 2.0 Amps
240 Volts, 50/60Hz at 2.0 Amps
NOTE: Refer to the rear panel of the MA6500 for the correct voltage.
DIMENSIONS
17-1/2 inches (44.5cm) wide by 7-1/16 inches (17.9cm)
high. Depth behind front panel is 18-1/8 inches (46cm)
including connectors. Knob clearance required in front of
the mounting panel is 1-1/8 inches (2.9cm).
2

McIntosh MA6500 Specifications

Power Output

RMS Power Output at 8 ohms	120 W
RMS Power Output at 4 ohms	200 W
RMS Power Output at 2 ohms	250 W

Distortion and Noise

Total Harmonic Distortion	0.005%
Intermodulation Distortion	0.005%
S/N Ratio (A-Weighted) Power amp	110 dB below rated output

Input and Output

Maximum Voltage Output	8 V from 20Hz to 20kHz
Input Sensitivity High level	250 mV for 2.5 V rated output
Maximum Input Signal High level	10 V

Impedance and Gain

Output Load Impedance	2, 4, or 8 ohms
Input Impedance High level	22k ohms
Voltage Gain High level to tape	0 dB

Weight and Dimensions

Dimensions (h x w x d)	13.7 x 44.5 x 46 cm
Weight net	18.6 kg
Weight shipping	27.3 kg