4 channel amp??

Hey everyone.

Well, too start off, I've got a Sony Mobile ES XM-7547 (http://www.carreview.com/mfr/sony-style/amplifiers/PRD_49315_1806crx.aspx) , and I don't understand the meaning behind the four channels stuff. Ive got the amp hooked to two Alpine Type R 12's, the two ohm edition, and they just dont seem as loud as they should be. The power is ranked as so...
Max. Power Output* (4Ohms)
- 4-Channel: 180W x 4
- 3-Channel: 180W x 2 + 600W
- 2-Channel: 600W x 2
Rated Power Output (4Ohms)
- 4-Channel: 75W x 4
- 3-Channel: 75W x 2 + 300W
- 2-Channel: 300W x 2

Im new to car audio, so Im trying to learn. My question is, since I dont understand the channels thing, how can I set up my amp to get the most power to my subs, specifically that 300W x 2 zone?

that amp u got aint no good for those speakers... u need bigger power... that amp is mainly used for door speakers or 6x9's or somthing... those speakers take 500 rms and 1500 max... and ur using like 150-200... go check out hifonics amps... thats what i did...

oh... and a little wise advice... dont even mess with those sony amps ne more dude... i found out the hard way... they aint no good... ("sorry sony"):icon16:

oh wow, I figured this amp has at least 1200 peak, alright then I guess I'll start shopping around for something bigger. thanks.

if you are looking for more something that is not hifonics try this amp. http://www.edesignaudio.com/edv2/product_info.php?cPath=21&products_id=44 i am getting that amp for my type r's when i get the money

there are plenty of amp makers around .... class D amps typically give you a lot more watts per dollar.

And pretend that "peak power" doesnt even exist. Always go by RMS. for two type R's you should have at least 500w each. So find a new class D amp that puts out at least 1000w or so.

alright thanks a lot guys, im pretty much stuck with this amp for now considering i just dropped a decent amount of money on the subs. and i think ive established that no matter where i hook up the subs on the amp, like on any channel, its still gonna get the same power, right?

try and bridge the front two channels to power one sub, and the rear 2 channels for the other sub. Hope the amp will handle the load.

alright thanks a lot guys, im pretty much stuck with this amp for now considering i just dropped a decent amount of money on the subs. and i think ive established that no matter where i hook up the subs on the amp, like on any channel, its still gonna get the same power, right?

how much did you pay for your type r's i got mine for 117 each for 12" 2 ohm ones

is there a place on the forum that can explain to me what bridging is and how to do it? and i payed 149 a piece for them. best buy wants 255 a piece right now, how ridiculous is that.

bridging is when you connect the left and right channels of an amp together to produce one larger amp channel.

OMG .... I just had a nightmare. READ the instruction manual, it will tell you how to bridge the amp, if possible. All I could see was someone putting both L&R +'s together and both L&R -'s together from the amp outputs.

i was given the amp from a friend for free, had to get it repaired, which i did, so no manual to read. i took it to a local audio shop and they looked at it for me and set everything up nice, so im pretty sure i got it now. however before i took it there, i noticed that the positive and negative of one channel werent going to the corresponding ones on the speaker, so low and behold i was running off one sub, and the other was just vibrating. remind me never to go to that person again.

if you are looking for more something that is not hifonics try this amp. http://www.edesignaudio.com/edv2/product_info.php?cPath=21&products_id=44 i am getting that amp for my type r's when i get the money


If ur using this amp... ur only pushing the alpines 1/3 of there potential. Even if u max the amp out thats all u get... it just depends on how loud u wanna go...

umm no 900 rms at 12.5 volts . and would be around 950-1000 on 14.4 volts at 2 ohms. and where do you get 1/3 at. max is the highest it can handle before the subs fails to produce musical sound waves. and usally when people tend to blow they subs. and if you think that then you need to get different subs cause type r's only can handle 500 rms each and thats it.