Jeff Rowland Model 1 Solid State Amplifier w/Original Wood Crate

Free Shipping on *ALL* Electronics (Excluding Speakers, Contiguous 48 US States Only)

Fantastically well-built amplifier from the early 1990's.

Compact design and perfect for a high efficiency speaker.

Tested in our lab and working to perfection.

Will ship in its original wood crate as pictured for safe transport.

SkyFi Cosmetic Notes:
• Front panel anodization has faded in color and turned purple in the bottom half.
• The far right terminal block has a stripped screw which means that only the inside set of terminal blocks can be used, which should be fine for most audiophiles. Funny thing is so did the review sample that Stereophile had!

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 - Better

Kimber Kable - RCA Interconnects - Best

Kimber Kable - BALANCED XLR Connectors - Better

Kimber Kable - BALANCED XLR Connectors - Best

Kimber Kable - Speaker Cables - Better

Kimber Summit Series Monocle XL Speaker Cables (PAIR) - Best

Kimber Summit Series BiFocal XL Bi-Wire Speaker Cables (PAIR) - Best If Applicable 

Kimber Kable - Power Cords - Better

Kimber Kable - Power Cords - Best 

Description
Solid-state stereo power amplifier

Power output:
60 Wpc into 8 ohms (17.8dBW)
120 Wpc into 4 ohms (17.8dBW)
215 Wpc into 2 ohms (17.3dBW)

Bridged power output:
240 Wpc into 8 ohms (23.8dBW)
360 Wpc into 4 ohms (22.6dBW)
500 Wpc into 2 ohms (21.0dBW)

Power bandwidth:
0.3Hz to 300kHz, –3dB

Slew rate:
70V/ns

THD+noise:
Under 0.035% at 1kHz, rated power into 8 ohms

Damping factor:
Greater than 200, 20Hz–20kHz into 8 ohms

Output current:
22A peak, continuous, 55A peak into 0.1 ohm for 20ms at 1kHz

Input impedance:
100k ohms, 20k ohms, or 600 ohms (user selectable)

Input sensitivity:
136mV for 1W into 8 ohms

(Voltage gain: dealer adjustable, 26dB standard.)

Common mode rejection ratio:
Greater than 90dB

Power dissipation:
175W (idle)

Dimensions:
15" W by 5.75" H by 15" D

Weight:
48 lbs

The SkyFi Testing Process for Solid State Amplifiers:

We start with a visual inspection of all internal components to make sure that there are no signs of heat stress or damage. Capacitors are checked for telltale signs of predictive failure including bulging, shrunken wrappers, or physical leakage. We also inspect the PCBs for discoloration from resistors or transistors that may have been running hot. On vintage units we often spot check select capacitors for value and ESR.

If the amplifier passes visual inspection, we move on to a controlled power on sequence using a Sencore safety analyzer to monitor current draw in real time. Once the amplifier is determined to be safe to operate, we connect it to full AC mains for function and power testing. We connect the speaker outputs of the amplifier to a Sencore PA81 Power Analyzer which acts as a dummy load, DC offset monitor, and oscilloscope interface. We start with a low level 1KHz test signal at the amplifier’s input and slowly increase its amplitude while monitoring the output on an oscilloscope for signs of noise, clipping, distortion, or improper channel balance. We continue increasing the signal level until the amplifier reaches clipping. At this point we take an output power measurement and compare it to the spec sheet of the amplifier to verify proper performance. If the device under test has both balanced and single ended inputs they are both tested at this time. We finish off the bench evaluation with a 1KHz square wave check and a 20Hz to 20KHz sine sweep to assess the amplifier’s frequency response characteristics. This battery of tests will usually reveal if the amplifier has any issues that need further attention.

Before the device leaves the bench, we perform a listening test with actual music using a variety of preferred test tracks. Our benches are outfitted with familiar monitor speakers which help us identify inconsistencies that will not always show up on our test gear. The main things that we are listening for are hum or noise with no signal present, proper center image, clicks, pops, or any other obvious undesirable audio characteristics.

If the unit passes all of these tests it is moved to our long term testing rig where we simulate real word operating conditions for 6-8 hours. This allows us to monitor the unit for signs of thermal runaway or intermittent issues that only crop up when the unit has fully come up to temperature.