well i bought a velocity (good make??? never heard of?) ages ago from a bootfair for £1 or something, and i now need to know if its working, i wired it upto my car battery and all the power light lit up so i know its not totaly dead, but i need to know if theres a way to check if its all working without plugging it up to a car stereo? here are a few pics just incase-
and on other end is just pre out input thing and some switches.


and on other end is just pre out input thing and some switches.