For sale is a black finish Wyred 4 Sound ST-500 amplifier. I have owned the unit for approximately a half-year. The unit is in beautiful condition, and is a superb performer. It definitely was an improvement on my Musical Fidelity mono amplifier at the same retail price.
The amplifier can drive any speaker without breaking a sweat, and is very attractive and flexible (has both balanced and RCA connections available as well as 110/220 manual switching, and excellent speaker connects.
You will be happy with the performance and reliability of the ST-500. There are several Internet reviews of this unit, I particularly found the Positive Feedback review to be true in describing the performance and sound of the amplifier.