Jeff Rowland Synergy MKII Two Piece Preamplifier with Remote

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Gorgeous and incredibly executed preamp from JR that's made right here in the USA. An excellent match with the JR Model 112 Stereo Power Amplifier currently available. 

Built out of a solid block of aluminum, and utilizing the best components available. Full featured, yet simple to use with a large and bright numeric display.

Speak of the display, this is a rare version with a RED LCD readout. 

The included separate power supply sets this piece apart from anything else in this price range.

And the basic remote comes with what you need most to avoid becoming a distraction between you and your music.

Best of all, Jeff Rowland is still servicing and supporting their equipment.

Specifications:
Solid-state, balanced line preamplifier with separate AC power supply

Inputs:
5 per channel (XLR); 1 per channel, home theater bypass mode (XLR)

Outputs:
1 main output per channel (XLR), 1 record output per channel (XLR)

Overall gain:
adjustable for each input, ±20dB relative to unity gain (0dB) in 0.5dB increments

Input impedance:
adjustable for each input: 36k ohms or 600 ohms

Output impedance:
80 ohms (40 ohms each signal phase)

Maximum input level:
13V RMS at 0dB gain

Maximum output level:
13V RMS (24dBm)

Output noise level:
10µV, 20Hz-20kHz bandwidth, 0dB gain

S/N Ratio:
>96dB

Channel separation:
>100dB, 20Hz-20kHz

Frequency response:
5Hz-160kHz, -3dB

THD + noise:
0.0012% at 10V output, 600 ohm load

Channel balance:
±0.05dB over entire volume control range

Dimensions
Preamplifier:
17.5" W by 3.15" H by 6" D

Weight:
24 lbs

Power supply:
17.5" W by 1.5" H by 4.8" D

Weight:
7 lbs

Finish:
Black chassis with polished aluminum front panel

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.