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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 outputINPUT 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).
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1. The heavy lines on the schematics denote the primary
signal path.
2. Unless otherwise noted, all voltages indicated on the
schematics are measured under the following condi-
tions:
a. AC input at 120 volts, 50/60Hz
b. All voltages are +\-10% with respect to ground. A
high impedance (10megaohm) voltmeter must be
used.
3. Unless otherwise specified:
a. Resistors values are in ohms.
b. Capacitor values are in microfarads (uF).
c. Inductor values are in microhenries (uH).
4. On PC Board Drawings, Square Pad Indicates:
a. Polarized Capacitors - Positive
b. Diode - Cathode
c. Others - Pin 1
5. The voltages enclosed in a box are signal voltages that
are measured with a 2.5mV, 1kHz signal connected to
both channels at the TUNER input jacks.
NOTES
MA6500
Front panel controls are set at:
BALANCE ....................................CENTER DETENT
TREBLE BASS ............................. CENTER DETENT
INPUT SELECTORS ...................................... TUNER
LOUDNESS.......................................................... OFF
POWER ................................................................... ON
VOLUME ................................. FULLY CLOCKWISE
MONO ...................................................................OFF
SPEAKER SWITCHES 1 AND 2 ........................... ON
Rear panel controls are set at:
PROCESSOR........................................................ OUT
PWR AMP INPUT ................................................. INT
SPEAKER TERMINALS .................... NO LOAD ON
OUTPUTS
6.WARNING:
Parts marked with the symbol have critical
characteristics. Use ONLY replacement parts recom-
mended by the manufacturer.
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