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Jeff Rowland Model 12 - FOUR Piece Monoblock Amplifiers - WOW

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Pickup currently unavailable at SkyFi 479

Jeff Rowland Model 12 - Four Piece Monoblock Amplifiers Wow Amplifier

Jeff Rowland Model 12 - FOUR Piece Monoblock Amplifiers - WOW

SkyFi 479

Pickup currently unavailable

479 South Broad Street
Glen Rock NJ 07452
United States


Beautiful and very unique looking 200W monoblock amplifiers from Jeff Rowland. Produced from 1999 - 2004.

Amazing construction and build quality, featuring a solid aluminum suitcase-like chassis design. The machining costs alone must have been impressive!

Some variations of this amplifier suffered from power supply failure, but we were able to confirm with Jeff Rowland that these feature the early and super reliable analog power supplies which were not affected. In fact, we performed a thorough test and were not able to find a single issue.

On the back you'll notice my absolute favorite type of speaker binding post, plus facilities to connect additional amps with XLR outputs.

Includes the original packaging, and a pair of 20A power cords.

Cosmetic Notes: Aluminum chassis show light marking in certain lighting. Tops of units show residual marks from feet due to stacking. Brand lettering worn on one amp. 

Please see the manual below/our last photo for specifications.

Jeff Rowland Model 12 Mono Power Amplifier Owner's Manual

The SkyFi Audio Testing Process for Amplifiers (Solid State):
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.



Original Box







Yes - Power

Physical Condition


Working Condition


SKU: 101641