I have a Sony Xplod XM-504Z400 watt 4-channel amp and a Sony Xplod XM-502Z 250 watt 2-channel amp. I was wondering if it was o.k. for the amps to get a little hot.......If I turn the amps on for about 3 minutes or so, they will start to get warm. Is this normal or is it something I should worry about?

Also, is it bad to mount your amps near metal? The reason I'm asking is because I mounted my amps to the back of my seat. And the only thing that is under the back seat is metal that is under the carpeting. A guy at my local car audio shop told me that the amps can short out if they are mounted/screwed into something metal........Is this right? He also said that I should put a board undereach seat and mount the amps on the boards. Is this something that I should do?

A little off topic...but....how do I bridge the two channels together on my Sony 250 watt amp in order to push all of the wattage through one channel? Or do I even have to bridge them together to get the full wattage out of one channel?

 

its normal for your amp to heat up a little bit mine does that too but ithas never over heated ...and i've had it for almost a year

 

Yea mate, amps will get hot, depending on how hard you run them. Ive seen amps keep running after the plastic around the terminals has melted. As far as metal goes, I dont know what he is talking about it shorting, maybe he is refering to the +ive cable touching the metal. Thats the only thing I would be worried about. Aside from that, I wouldnt mount it onto metal personally cause it will vibrate like anything and may cause damage further down the track. And as far as bridging, look at the output terminals, being a 2 channel, there should be a L+, L-, R+, n R-, or something to that effect. Simpilly, bridging requires that you run the speakers + from the L+, and the speakers - from the R-, ( I think thats the way it goes, there should be a line between the 2 terminals you should use with 3 letters on it, cant remember what they are.) BUT, why are you bridging? You only want to do that when you are running a sub, not a pair of speakers. If you are jsut running a pair of speakers off of it, use the conventional 2 channels to run them. If you are running your subs off it, might I remind you that that amp will only put out 100W RMS bridged, which isnt really enough to get the most out of a RF sub, and if you are planning on running the subs in parallel, you will put a 2ohm load on the amp, which it cant handle and it will fry. More info about your intentions, n Ill try help you out best I can.

 

My 2-channel is for my Subs. I have two Rockford Fosgate 8 ohm subs in a dual box which are wired to a binding post. The binding post is bridged togethersop that Ionly need one + and - connection to the amp. So, the load on the amp would be 4 ohms right? 8 ohm sub + 8 ohm sub = 4 ohm load, right?

 

Is 4-ohm load correct? I'll just use a multi-meter and see what the ohmage is on the subs. (when both subs are connected to the binding post)

 

well...make sure you wire it in parallel and you will be at 4 ohms.....

if you wire it in series then you're lookin at a 16 ohm load....so just make sure that both of the subs have the positive to the positive on your amp and the negitive to the negitive on your amp.

 

http://www.cardomain.com/shop/woofer...;x=113&y=3


Sub wiring guide tells you what ohms they would be at and the possible ways to hook them up ^^

 

O.K. Thanks guys......thats what I needed to know.

 

How do I know if my subs are 4 ohm or 8 ohm each? will it say it on the back of the sub, like on the magnet or something? I used a volt meter and it said that they are 4 ohms each, but when I have them bridged together it still says 4 ohms....So, which is it??? I bought my subs used. When I bought them the guy told me that they were 8 ohms a peace, but I just wanted to make sure.

Is it better to have one sub on each channel or is it better to have both subs bridged?

 

I got a better multi-meter and it rates each sub at 4 ohms and when bridged it isrightat 2 ohms. So, if I keep it bridged to one channel on this amp.......will it fry? It hasn't yet, but maybe if I keep it running for a longer period of time.....it might fry.

I looked at this page and it says that the amp can run at 2 ohms when both subs to both channels. Will this be o.k.? It being a 4 ohms sub to one channel and another 4 ohm sub to the other channel I think it would be o.k, but I would like to make sure with you guys first. So, if I unbridge them and just run them one sub to one channel and the other sub to the other channel. Will this work and not hurt the amp?

http://cgi.ebay.com/ebaymotors/SONY-...spagenameZWDVW

The only reason I'm using this low powered amp is because this is the only size amp that will fit on the back of my car seat. Any bigger and it won't fit. So, I am making do with this amp. Plus, I don't need alot of power for my subs.

Please get back to me on this.

Aaron