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Marantz Model 510m Amplifier

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Front View

Rear View
Image Attribution: Wayne Bunce
Date: November 5th, 1999

Top View
Image Attribution: Wayne Bunce
Date: November 5th, 1999

High Fidelity Test Report Snippet, 1977 Edition. PP 65-66

"Lab tests performed by the CBS Technology Center turned up some unusually impressive numbers and show the rating of this amplifier to be very conservative. Total harmonic distortion is rated at 0.05%, a recent upgrading from Marantz's original 0.1% spec; the worst the lab could squeeze out while remaining within rated power was just under 0.02% - and that was at 20kHz. Intermodulation (rated at 0.1%) remains far lower to well beyond rated power for 4-, 8-, and 16-ohm loads and shows virtually no tendency to rise at low power levels."

Contributed by Fred Swearingen
On January 1st, 2000


Retail Price999.95, June 20th 1975 Marantz Dealer List
Ebay High-bid$1913.00 (auction #1368022067, July 27/2002)
First Year1975
Last Year1978
Matching Preamplifiers3600,3800
Wood CaseWC-7 (WC-1 according to June 1975 list)
Blue FaceYes
Speaker ConnectionsOne set
AC SwitchYes

Width15 1/2
Height6 1/4

RMS Power Per Channel256x2
Total Harmonic Distortion (THD)0.05%
Power Bandwidth20 Hz - 20 kHz
Intermodulation Distortion (IM)0.03%
Gain Control(s)Dual
Meter RangeSingle: Off, 0 db (2.56 watts), +10 db (25.6 watts), +20db (128 watts, +3dB is 256 watts)
Peak Lamp(s)Yes
Output Meter(s)Dual
Cooling Fan(s)2-speed

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