Sub AMP Install Problem! Need Info

jeremys · Post by **jeremys** » Mon Jul 18, 2005 12:56 pm

I have a two chanel class d amp. I have it hooked up to 2 subs, on two chanels. They are not bridged. The amp has two RCA input jacks. When I put one in both chanels play. But when I put both in they dont. My RCA conections are good because they play when either the L or R connection is in, but just not both. Can any one help me out. By the way the RCA connections are from a step down.

Post by **GlassWolf** » Tue Jul 19, 2005 4:45 am

the amplifier is damaged.
you have a bad ground line for the line in signal inside the amplifier causing a short between the two channels.. one or the other works alone, but connecting both at once causes a short between both channels, and thus your problem.
this also explains that thumping or pulsing noise in the other thread.
time for a better amplifier

Darthness · Post by **Darthness** » Tue Jul 19, 2005 5:05 am

wait... so putting both RCA's into your amp for the l/r speakers causes them to short?!

How can i avoid stuff like this when isntalling my amp?

smoker · Post by **smoker** » Tue Jul 19, 2005 6:07 am

dont install a damaged amp.....if your amp is ok you shouldnt ahve this problem

Darthness · Post by **Darthness** » Tue Jul 19, 2005 6:13 am

oh okay.

my amp is brand new, its just siting in its box all pretty, waiting to be installed!

jeremys · Post by **jeremys** » Tue Jul 19, 2005 8:08 am

Well actualy I figured out the problem. When my step down was put in it was put in incorrectly. Where the wires should of been + - they were hooked up - +. Ie causing them to be inverted when both rca jacks were inserted. My amp is not damaged.

Post by **GlassWolf** » Tue Jul 19, 2005 2:20 pm

aha, so it was a short.. it was just at the LOC and not at the amp.
my prior post was closer to the problem.. it was just a matter of finding where the problem was.
I was thinking it was at the input stage, and it was at the line out converter

glad ya found it

kevinberry1 · Post by **kevinberry1** » Tue Jul 19, 2005 6:08 pm

That's good your amp isn't faulty. Now go back to that installer and explain your problem to them :)