AcousTech PH1 PREMIUM - Stereophonic Phono Preamplifier Designed by Ron Sutherland

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This is the PREMIUM version of their highly regarded PH1 phono preamplifier.

It's also a Stereophile Class A rated phono preamp from Ron Sutherland.

Dual Mono construction utilizing the best parts available.

Highly adjustable for both MM and MC cartridges (Moving-Magnet and Moving-Coil).

If you provide your cartridge brand and model we'd be happy to configure it for you before shipping. 

Tested and working perfectly here in our lab and listening room. A few slight scratches on top cover as showing our photos, but otherwise very good.

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 - Phono Interconnects

Kimber Kable - Power Cords

Technical Specifications
Solid-state MM/MC Phono Preamplifier
(Moving-Manget / Moviing-Coil)

Voltage gain:
61.5 dB (MC)
42 dB (MM)

Input impedance:
100 ohms in parallel with 0.01µF (MC)
47k ohms in parallel with 200pF (MM)

Maximum output:
8V RMS

Recommended load:
10k ohms or greater

Power consumption:
< 10W

Dimensions:
18.5" W
2.5" H
12.75" D

Weight:
20 lbs

AcousTech PH1 PREMIUM - Stereophonic Phono 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.