PHONICS DIGITAL PD-IC4CH 4 CHANNEL 300W MINI CAR and MOTORCYCLE AMPLIFIER
I compiled several items to make a sound system for my cruiser motorcycle.  Space being a major consideration, I selected this amp and purchased it a few months ago.  Getting around to assembling the components recently and tested it out before final installation.  Only one channel functioned, I re-checked all connections and still only one channel.  I systematically switched the functioning input to the other three inputs to the amp and none of the other three channels worked even with the same speaker tha