Alpine 3553 amp problem

Hi,

This is my first post to the forum and I am in desperate need of some advice.  I have a second-hand Alpine 3553 amp installed under the driver's seat of my Ford Focus (european).  I have wired it up and the amp seems to be powering up fine.  The light goes red, then changes to green after a couple of seconds.  However, when I connected up the speakers it produced no sound at all.  I have confirmed that the all the cabling is ok by connecting a Jetsound amp, and it all worked fine.  There is not enough room under the seat for the Jetsound so I need to get the Alpine working somehow.  I have no manual so I guess I might be setting it up wrongly, as it has a lot of settings.

Things I have tried:-

• Input selection switches
• Gain levels

I think that I am connecting the speakers up correctly, but if anyone has any ideas on this I would really appreciate it.

Cheers,

Web

Try hooking the amp up to a different power and signal source and see if you get any output.  If you do, then you know the amp is fine and something is wrong with the wires in your vehicle.  If you still don't get any output, then you know that the problem lies with the amp--either the amp itself is damaged/broken, or one of the settings needs to be changed.

As long as everything is connected properly and the gains are set to at least 25% you should definitely get some sort of output...

I have confirmed that the wiring is OK by connecting a different amp to the same wiring that doesn't work with the Alpine.  So I'm guessing that it must be something to do with the amp being faulty or the amp's settings.  Although I am not 100% sure that I have wired the speakers correctly!

Yea but if the other amp worked using the same wiring then most likely it's something wrong with the Alpine amp.  Although I suppose you could have the speaker wiring connected to the alpine the wrong way.  You can hook up just one pair of speaker wires to see if that will work, and of course try each amp channel.  As a last restort you can check the speaker terminals for positive voltage using a DMM.