Marantz Model 8b Amplifier

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Front View

Rear View
EBay Auction #274850058
Date: March 8th, 2000

Bottom View
EBay Auction #278241510
Date: March 8th, 2000

Variations

There are a few variations to Model 8B back panels. The oldest units have an octal socket for powering old mono preamps, and some may have an AC convenience outlet.

Contributed by Kevin M. Hayes
On February 1st, 2000

Inputs

The Test inputs are the ones to use on the 8B. Sid Smith, who did most of the design work on the 8B insisted that rumble filters be used to counteract the noisy turntables of the day. Marantz disagreed, so they compromised by adding the test input, which is unfiltered.

Contributed by Mark D. Chamberlain
On May 5th, 2003

General

Description Power Amplifier

Rarity Scarce

Retail Price 249

Resale Value 1500

Designed in USA

Manufactured In USA

First Year 1962

Years Manufactured 1962,1963,1964,1965,1966

Last Year 1966

Matching Preamplifiers 7

Matching Tuners 10B

Blue Face Yes

Channels Two

Tube Design Yes

Tube Count 8

Speaker Connections Two sets

Power Source Details 105-125 VAC, 50-60 cycles

Special Option 1 Tube Cage ($9.00)

Physical

Width 13 1/2

Height 7 1/4

Depth 10 1/2

Weight 57 lbs

Amplifier

RMS Power Per Channel 35

Damping Factor @ Load Impedance 20 from 20 Hz to 20 KHz

Total Harmonic Distortion (THD) .5%

Power Bandwidth 20 Hz to 20 KHz

Frequency Response 20 Hz to 20 KHz

Hum and Noise 90 dB down from 35 watts

Signal to Noise Ratio 90 dB

Intermodulation Distortion (IM) .5% 20 Hz to 20 KHz

Cooling Fan(s) No

Auxillary Metering Yes

Output Impedance(s) 4, 8, 16 ohms

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