Marantz 300DC Solid State Power Amplifier - Mint and Rare Collector Piece

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The nicest metered Marantz from this era, and definitely a collectors item much like the 400 and 500. A top tier model from Marantz at the end of the 1970's and super rare to find - especially in this condition!

This specific example came from a collector who searched for AND only collected items that were in perfect shape (and then he took great care of them). This piece can be internally converted to 220V as well.

Featuring gorgeous backlit meters against a brushed aluminum faceplate.  

Click here for a PDF copy of the Marantz 300DC Owner's Manual

Click here for a PDF copy of the Marantz 300DC Service Manual

Technical Specifications:

RATED POWER OUTPUT, MINIMUM CONTINUOUS AVERAGE POWER PER CHANNEL, BOTH CHANNELS DRIVEN:
152 WATTS

POWER BAND:
20 Hz to 20 kHz

TOTAL HARMONIC DISTORTION:
0.03% (8 OHMS)
0.05% (4 OHMS)

Damping Factor:
60 (8 ohms, 20 Hz)

Sensitivity (at MAIN IN):
1.5 V

Impedance (at MAIN IN):
30 k ohms

Frequency Response for Power Amp only:
20 Hz ~ 20 kHz, ±0.2 dB

Power Requirements:
120 V AC, 60 Hz

Dimensions:
Panel Width
16-3/8" (416 mm)

Panel Height
5-3/4" (146 mm)

Depth
11-7/8" (301 mm)

Weight:
Unit Alone: 44 lbs (20 kg)
Packed for shipment: 48.4 lbs (22 kg)

Our Testing Process for Amplifiers (Solid State) at SkyFi:

We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and transistors are checked for signs of stress or damage.

We then power up the unit carefully and run a simple 1k sine wave while monitoring the output on an oscilloscope for signs of distortion or noise. Finally, we run the amplifier to its full rated power into the appropriate resistive load provided by our Sencore amplifier tester. If there is an issue, it will usually be noticeable at this point. If everything reads clean, we will often test for THD (Total Harmonic Distortion) measured by our Keithley distortion meter, and compare it against the original manufacturers specifications. The amplifier then remains powered on to "burn in" on our test bench for a few hours to make sure there are no heat related issues. If there are balanced inputs available they will be also be tested.

Final testing involves pushing actual music thorough the amplifier. We've learned over time that some issues are only noticeable to a trained ear while listening to familiar source material. Our test bench has reference vintage Kef speakers that we're very familiar with which quickly reveal any discrepancies. Some amplifiers will then move into our listening room where they are tested with our in-house reference speakers of choice.

Please click here for detailed specifics regarding our specialized packing process that separates us from the rest.