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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
DescriptionPower Amplifier
RarityScarce
Retail Price249
Resale Value1500
Designed inUSA
Manufactured InUSA
First Year1962
Years Manufactured1962,1963,1964,1965,1966
Last Year1966
Matching Preamplifiers7
Matching Tuners10B
Blue FaceYes
ChannelsTwo
Tube DesignYes
Tube Count8
Speaker ConnectionsTwo sets
Power Source Details105-125 VAC, 50-60 cycles
Special Option 1Tube Cage ($9.00)

Valuation, Purchases, Parts and Manuals

Physical
Width13 1/2
Height7 1/4
Depth10 1/2
Weight57 lbs

Amplifier
RMS Power Per Channel35
Damping Factor @ Load Impedance20 from 20 Hz to 20 KHz
Total Harmonic Distortion (THD).5%
Power Bandwidth20 Hz to 20 KHz
Frequency Response20 Hz to 20 KHz
Hum and Noise90 dB down from 35 watts
Signal to Noise Ratio90 dB
Intermodulation Distortion (IM).5% 20 Hz to 20 KHz
Cooling Fan(s)No
Auxillary MeteringYes
Output Impedance(s)4, 8, 16 ohms

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