This is a Conrad-Johnson HV-1 Pre-Preamplifier. It is designed to be used with low output moving coil cartridges just as a step up transformer would be used. However, instead of using a transformer, it uses miniature metal triode tubes called Nuvistors. It is in very good condition, there are no visible scratches on  the faceplate or on the black enclosure. It works great and is a fairly rare unit.

I've owned this almost since new. It sounds gorgeous, which is why I've used it for so long, but the signal to noise ratio can't match a solid state unit, and is very dependent on the Nuvistors installed. No hum that I can hear, but there is "tube rush".

 

It must be plugged into a moving magnet phono input.

Typical Conrad-Johnson sound and build quality. 

Here are the specs as listed on the Conrad-Johnson site:

Input Impedance 100 ohms (phono overload 200 mV at 1kHz)
Gain: 28 dB
Maximum Output: 5.5 vrms
Distortion: less than .05% THD or IMD
Response: bandpass 20Hz to more than 20kHz
Tube Complement: 2 X 6CW4

Shipping listed is for the lower 48 states, please contact me for Alaska, Hawaii, or Canada. International shipping is available through ebBay's Global Ship program, but it can be very expensive, and they set the price.

Full money back if you are not satisfied and it is returned in the condition it was shipped to the buyer. Buyer pays for return shipping.

Please let me know if you have any questions.