You know the low down on these. High quality signal output at 8 volts.
Installs between your head unit and an amp. If you need to increase the
voltage on your signal going into an amp this definitely does the job.

Prices on ebay are all over the map on these. I have seen a high price of
over $100. The average is less than that of course.

Asking $65.00 plus shipping. Shipping is not expensive since this unit is
pretty small and light weight.