Maybe you should try "Sherlock Holmes" method of sleuthing your problem.
First isolate the various systems. The problem could be your amp, your amp
wiring, your speaker wiring, your RCA's or the HU.
Try these things:
Isolate your amplifier and use another source for your music. Could be a
portable "Walkman" or an MP3 player. just use an adaptor cable from the
headphone output to your RCA amp inputs. You should also apply a 12V signal
to your amps remote turn on from a different source. Maybe jumper from the
amps B+ with a short wire. If your amplifier works fine this way, then it
isn't the amp or its power wires. If the amp still cuts out, then the
problem is with the amp or with its Power/Earth wiring or the speaker
wiring. Kind of sounds like the amp is going into protection though.
Check your speaker wires for shorts and proper impedance loading. Remove all
speakers from the amp and see if it stays on with a signal coming from your
portable source. Then, 1 at a time put your speakers back onto the amp.
Make sure that at first you only play one speaker wire set at a time. Then,
If the amp works with any single set of speaker wires, start trying
combinations of speakers.
If all seems fine this way, then use your portable source and use the remote
turn on from your head unit. This will test the RTO line from your HU to
the amp.
Also, you might try setting your amplifier gains lower. Some amplifiers can
"rail up" the input section if the gains are too high. This could make the
amplifier go into protection.
Here are some suggestions if you find that the amplifier appears fine by the
above methods:
You may be driving the shield of the RCAs if you are using a factory radio
adaptor harness. This can happen two ways. You may have spliced the wires
incorrectly or your factory radio is of the BTL (bridged transformerless)
kind. If the HU is BTL, there will always be a DC voltage present at its
outputs and could cause your amplifier to act improperly. If you find that
you do have BTL outputs, then use line adaptors.
If you have a problem with a system, always, always, always Isolate, Inspect
and Investigate. One step at a time and with a planned methodology. Once
you have ruled something out, check it off your list. Just like sherlock
Holmes.
BTW it wasn't Sherlock Holmes/Sir Aurthur Conan Doyle that popularized the
scientific method, it was an English Doctor named Bell.
Hope this helps
Taffer Garrett
"Fuzzy Orange" wrote in message
...
Guys got a huge problem with my ice
Basically when you put the earth on the bodywork (or direct to earth on
battery), effectively powering the amp up, my speakers play for 2 seconds
then fade out to nothing
It stays like this unless you pull the power cable leave it for 10 seconds
then connect it again - then again 2 seconds then fade out and dies
Is my amp knackered?
Ive checked the main 12v feed and switched - both roughly 12v!
Ive tried new earth, new power (both)
Ive tried unplugging the front speakers, and unplugging the sub
Ive tried a new phono cable
Im totally confused
Only thing I will say is when I got my head unit out the earth cable to
that
was disconnected - which I found weird cos the stereo is working fine and
the rear speakers (wired straight from HU) have been working fine all day
I need to sort this asap cos the amp is wired in under my passenger bucket
seat - so its a bit depressing that it doesnt work - cos I have to take
the
seat out every time I try something with it 
Which takes hours :'o(
HELP!
HELP - Amp problem :o(
Hybrid Mode
