Jeff Rowland Concerto Preamplifier - With Remote and Rare Phono Stage

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This incredibly made concerto performed in our lab better than most preamps twice the price.

If you're looking for a neutral super clean and tidy sounding preamp, this might be the piece.

Best of all, its fitted with a super rare phono upgrade installed at the factory!

Super clean with no signs of use at all.

Includes the original remote and original packaging.

Great match to the Jeff Rowland monoblocks shown in the last photo.

*Please note these Jeff Rowland monoblocks are available for purchase in a separate listing. They are not included with this preamp.

Please see our last photo or the linked manual below for full specifications:

Jeff Rowland Design Group Concerto Preamplifier Manual

The SkyFi Testing Process for Preamplifiers:

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. Special attention is paid to the power supply which is the most common source of failure for preamps. We then power up the unit and run a simple 1k sine wave while monitoring the low voltage output on an oscilloscope for signs of distortion or noise to get a baseline.

At this point we will lubricate and clean all switches and potentiometers (that are not sealed) with a high quality contact cleaner, and then re-test all functions for any signs of noise or scratching.

Final testing involves putting actual music through the preamplifier. We have learned over time that some issues are only noticeable to a trained ear while listening to a familiar source material. Our test bench has reference vintage KEF speakers that we are super familiar with which will quickly reveal any discrepancies. Some preamps will then move into the listening room where they will be tested with our in-house reference system.

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