Installed amp now no sound

[Dan Whitaker]

I installed a 400w four chanel amp today to power my rear speakers and a 200w to power a small woofer. The 400w had RCA input and output. I had sound from the woofer but nothing from the front or rear spakers. I did not hook up the front speakers to the amp.
When I turned the HU on I heard a small pop sound and imediately turned of the HU.
I then unhooked both amps and wired the speakers back just the HU and still no sound.
I checked the fuse on the HU and it was not blown. The clock works, the cd works and the radio still tunes in stations but no sound.
Did I somehow blow the HU's built in amp? I tried hooking up an old stock speaker that still worked thinking I may have blown the speakers but there was no sound from it either.
The HU is a Blaupunkt RPD555 and the amp is a Jensen that I bougt used.
Any thoughts greatly appreciated.

 

[Heath]

Sounds like you poped the fuses on the am to me, not the HU...

 

[Dan Whitaker]

I don't have the amps hooked up. After having no sound I wired the speakers back to the HU harnes and still nothing. That is why I think I killed th HU.

 

[Dan Whitaker]

Help! Any ideas anyone.

 

[ShadowA2J]

Try hooking up another HU. If it works then it's your HU, if not then it's something else.

 

[2000EB4x4inGA]

Well the factory head unit work with no amps in the line? I dont know about explorers but i do know on my old taurus without the premium amps it wouldnt work at all.

 

[Dan Whitaker]

I'm not using the factory HU. When I instaled the one I have I ordered the full wiring kit from Crutchfield which by-passes the factory amp.