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Krell MDA-300 Monoblock Amplifiers - Complete Set Near Mint - 300W

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Pickup currently unavailable at SkyFi 479

Krell Mda-300 Monoblock Amplifiers - Complete Set Near Mint 300W Amplifier

Krell MDA-300 Monoblock Amplifiers - Complete Set Near Mint - 300W

SkyFi 479

Pickup currently unavailable

479 South Broad Street
Glen Rock NJ 07452
United States


Very highly regarded set of Monoblocks from The Golden Era of Krell, fully tested in our lab and listening room.

You're not going to find a nicer set of 300's. They powered our Dunlavy SC VI's with ease AND great dynamics.

Yes, it would be hard not to get great dynamics from these monstrous speakers, but we never experienced such ease and effortless sound from any other previous amplifier combination.

You would need to spend $20k on new monoblocks in order to match this performance today.

These ALSO come COMPLETE with all of their original packaging, manuals, XLR shorting jumpers, and power cords! 

Click below to add our recommended matching cables from Kimber Kable, all brand new as SkyFi is an official Kimber dealer.

Kimber Kable - RCA Interconnects

Kimber Kable - XLR Interconnects

Kimber Kable - Speaker Cables

Kimber Kable - Bi-Wire Speaker Cables

Kimber Kable - 14AWG (Gauge) Power Cords

Kimber Kable - 10AWG (Gauge) Power Cords


300 watts at 8 ohms
600 watts at 4 ohms
1200 watts at 2 ohms
2400 watts at 1 ohm

Signal-to-Noise ratio
108 dB unweighted


Slew Rate
50 v/ms

Input Impedance
47 K ohms

Damping Factor
30 20-20 KHz

Power Consumption
400 watts continuous

19" W x 8.5" H x 16.75" Deep

Weight, unit only, each
94 lbs

Shipping Weight Each
105 lbs

The SkyFi Testing Process For Solid State Amplifiers:
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.



Original Box

YES Included


YES Included


Not Applicable


Yes - Power Only

Physical Condition

9 / 10

Working Condition

10 / 10

SKU: 101650