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SA-WX700 amp replaced, wired right?

post #1 of 9
Thread Starter 
I have a SA-WX700 and the amp stopped working. The first time this happened it was under warranty and had the amp replaced. The second time it happened I followed the instructions on this thread and it worked for about a year. A third time now the amp has stopped but this time I could not figure out why. "When" it works I am pleased with how it sounds. I decided to try a whole different amp this time and went with a Bash 300. This amp is rated for 300 watts RMS @ 0.5% THD into 4 ohm load (mono output btw). Being the SA-WX700 has 2 10" subs I was wanting to make sure I did not mess up the amp or speakers. I measured the resistance at 3.5 ohms so I figured the best thing to do would be to wire the speakers in series.

Now with the type of cabinet I was under the impression that it should be the positive of one speaker should be wired to the negative of the other and then use the pos/neg left over to go to the amp. Can someone tell me if this is right or wrong?

Below is a picture of what the SA-WX700 looks like and my amp install.




LL
LL
post #2 of 9
Thread Starter 
NM. I found an article on push/pull subwoofer designs and figured it out.
post #3 of 9
I've decided to take the speakers out and just build two seperate boxes for each and power them with a seperate amp. It seems the speakers sepratly are 8 ohms, does this sound correct?
post #4 of 9
Thread Starter 
I measured 6 Ohm each. Doing what I did sounds better than the original amp.
post #5 of 9
I am looking to do he exact same thing to my SA-WX700. Did you wind up wiring in series? Also, I was looking at the 300S amp you used, what did you have to do to make it fit? Doesn't seem to be the same size. From the picture it looks like you took part of the original metal back plate an reused it? Did you have to cut it? Thanks for any help.
post #6 of 9
Thread Starter 
Ended up wiring in parallel. I took off the metal plate on the back and cut a hole in it to match what was needed to mount the new amp. Still no problems with it today.
post #7 of 9
Thanks for the info. I think I will do this. I'm tired of repairing them, wait a few months, and then the fuse blows again. Got a lot of good use out of them though and I'm glad I can keep them going. Parallel wiring it is.
Edited by Grimmace13 - 5/12/13 at 2:27pm
post #8 of 9
Thanks for the info! I just completed a similar mod myself. In my situation, the original amp started making crackling sounds even with nothing connected.

I decided to mount the amp vertically, I felt it fit better that way, especially because the amp mounting holes were close to the edge, and would likely interfere with the wood in the cabinet. I cut a small piece from the scrap to cover the outlet cut-out, and stole a pieve of the foam material to sandwich it with. The speakers I wired in parallel, just like they were originally.

It works great smile.gif






post #9 of 9
Thread Starter 
Quote:
Originally Posted by hiperco View Post

It works great smile.gif

To be honest I think it sounds better than the original amp.
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