Marantz Model 9 mono power amplifier

Year of manufacture:

1960-1968

Manufactured by:

Marantz America, Inc. 1100 Maplewood Dr Itasca, IL 60143

Price when new (in the USA):

$324

Description:

power amplifier

Mono/stereo:

mono

Power output:

70 Watts RMS (40 watts in triode operation)

Total harmonic distortion:

less than 0.1%

Intermodulation Distortion:

less than 0.5%

Frequency response:

±0.1dB 20 Hz to 20 KHz and ±1dB 12 Hz to 40 KHz

Hum and noise:

90dB down from 70 watts

Signal to noise ratio:

90dB

Output impedance:

4, 8, 16

plus 1

tap for phantom center channel speaker (when two Model 9 amplifiers are used in stereo)

Damping factor:

20

Tubes:

4 x EL34 (6CA7), 1 x 6CG7, 2 x 6DJ6. Silicon rectifiers in power supply

Dimensions:

15½ wide x 8¼ high x 9½ deep (391 x 210 x 241 mm)

Weight:

63 lbs (28.6 kg)

Power supply:

105-125 VAC, 50-60 cycles 250 watts