Sutherland EngineeringPhono LocousedSutherland Engineering Phono LocoSoutherland Engineering Phono Loco phono preamp. Unit is in excellent physical and functional condition and has been modified to RCA (single-ended) rather than XLR (balanced) connectors. This is th...3995.00

Sutherland Engineering Phono Loco [Expired]


no longer for sale

Southerland Engineering Phono Loco phono preamp. Unit is in excellent physical and functional condition and has been modified to RCA (single-ended) rather than XLR (balanced) connectors. This is the ultimate expression of Southerland Engineering’s technology and a no-holds barred approach to phono signal processing. Please read Southerland’s web site explanation on this unit as it is very specialized and unique. Sells as new for $8,200.00

Loco FAQs

Q What Does Transimpedance Mean?

A transimpedance amplifier input looks like a virtual short to the input signal. The input voltage is therefore zero. The input signal is the current going in/out of that virtual short. The input current is multiplied by the gain (in Ohms) to give an output voltage corresponding to the input current.

Q What Are The Loading Options?

There are no loading options or concerns. A current input stage (transimpedance) input is a virtual short. That topology obviates load resistor selection. The current going into that short is then amplified.

Q Can I Use a MM Cartridge?

You are welcome to try. It is unlikely to work very well.

Q Will It Work With […] Cartridge?

We expect the Phono Loco to work very well with most MC cartridges. But there is not yet a body of info available. We will keep a user forum page updated so experiences can be shared.

Q What is the Gain?

Conventional voltage amplifiers express gain in dB (as the ratio between the input voltage and the output voltage). With a transimpedance amplifier, input is current and the output is voltage. For that topology, gain is expressed in Ohms. Gain is approximately 10k Ohms at 1 kHz.

Most MC cartridges will work well at the medium gain setting. There is also a low (voltage down 6dB) setting and a high (voltage up 6dB) setting.

Q Will It Work With […] Cables?

Most audio signal cables are designed to transfer voltage changes. The Phono Loco input voltage is zero and doesn’t change. What does change is current. That is generally a favorable condition for cable performance

Q Since there is a unique interaction between the cartridge, phono cables, and Phono Loco, how do I avoid expensive experiments?

If your dealer has taken on the Phono Loco, they will have the experience to help build a superb analog playback front end. Your dealer will have explored various combinations. You don’t have to spend your money until you personally experience the winning combination.

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