Blowing Fuses

Hey Guys,

Im having a little troiuble with my audio system, hopefully someone can tell me whats up.  Ive recently gotten a new car and transfered my subs, amp, and head unit over.  I got a new wiring kit and set up everything exactly the same as I had in my old car (which was installed for close to a year without any probs.)  I am currently running two Sony XS-L1090 P5 (10" 5sided aluminum cone subs with a 1200w peak and 400w RMS) off of a Sony Head Unit with a 1.2 farad cap.  For some reason I keep blowing fuses.  The system worked fine for about 6 weeks and then blew my in-line 30amp fuse.  I checked my grounds and replaced it with a 40amp fuse.  After about 5 days it blew the new fuse.  This time I redid my grounds to what I am positive are better ground sites.  Again my fuse blew.  At this point Im not sure what could be the problem, I am almost positive there is no short to groud on the power line.  Im not really eager to take it apart and start from scratch, so short of that, does anyone have any ideas or suggestions???  Thanks a lot guys.

Matt

Ah no, Sony heaven is actually in Oklahoma..... man trying to give Canadians a bad name....sheesh.

The main power wire fuse is there to protect the vehicle from a catastrophe, it needs to be as close to the same rating as the combined value as the fuses in the amp(s). Do not replace the fuses in the amp(s) with fuses of larger ratings.

You know, I thought I saw it once high up in the British Columbia rain forest... a big huge pile of steaming Sony... but that could have been due to my alcohol induced state. 

There are three 40amp fuses on the amp, the switch to the 40amp inline fuse was for that reason.  Thanks for the help guys...I'll check it out.

Oh?  Meaning the amp is designed to draw up to 120 amps? No wonder you blew anything smaller.   Might have been nice to know that.  Make and model numbers, etc.  You said you were running subs off a head unit... An amp pulling more than 100 amps needs 4 gauge power and ground cable and a 150 amp fuse or circuit breaker at the battery, and a high-output alternator.

The Amp is a Sony Xplod xm-D1000p5...Sorry must have deleted that in the original post.  I do have a 4 gauge power and ground running through a 1.2 farad cap to it.