i bought a kenwood 600 watt amp recently. (600W X 1) or (200W X 2) at 4 ohms. i was wondering if it would be enough to power 3 10" mtx thunder 4000 subwoofers. they are 400 watts peak and 200 rms.

 

bump bumpity bump

 

The only way to wire it would be to connect the speakers in series for a 12 ohm load. Then bridge the amp. The amp won't put out anywhere close to it's max output.

 

so should i just get 2 subs

 

Or you could wire it in parallel off 1 channel and hope to god the amp can handle a 1 ohm load....then you wouldn't be in stereo either, but that really doesn't matter for subs.

My PPI's do it, and don't even break a sweat, but I don't know if a Kenwood could pull it off.

IanS

 

Your best route is probably selling one of the subs. Otherwise buy one more and get a second amp. Or replace the amp you have with one that can run at 1.333333 ohms. Or, sell one speaker and buy one more amp. That way you can bridge both amps for their maximum stable configuration.

 

are you saying my kenwood amp can't bump just 2 of the thunder 4ks at their proper rms?

 

yep.

SuDZ

 

most definitly YES!!! bridge the amp down to mono operation and youll be set, ive installed these amps many times on x3 JL 12w0's and puts out really well for the ratings...

 

okay so this amp (kenwood ps-200) will bump the 2 10's well? what kind of amp did you have on ur jls...this same one? thanks for your response

 

I'm pretty sure the MTX's can take more than 100 RMS. The 200 watts you mentioned is max output. Max far exceeds RMS. They'll still thump, they just won't THUMP. There is a distinct difference.

 

i said they are 400 watts peak, 200 rms.

 

As I said. The kenwood's max output is 200 watts per channel. 100 RMS. Read how they, kenwood, word that very carefully if you misssed it the first time.

 

ah okay. i thought you were talking about the subs, not the amp. I APPOLOGIZE. I was just wondering how amps work like that. its 600 watts max(600X1) or 200X2. how does that work? shouldn't it be 300X2? probably a stupid question, but hopefully someone will help me out.

 

A lot of companies list an RMS rating at 4 ohms and a max rating that is probably at the lowest impedance the amp is stable. Then they also list a max total output that is the bridged total. Some even further cloud the picture by actually listing the maximum amount of power the amp will use. Since most class AB mosfets are 45% to 60% efficient the total input power can be more than double the output power. I generally try to find an independant test, usually in a magazine review. And will read those results. Another thing you can do is look at the fuse rating. volatge, V, times amperage, I, equals wattage. So 12.5 V X 25 I = 312.5 watts @ 45% to 60% efficientcy yeilds no more than 140.625 watts. Two channels means about 70.3 watts per channel. Four channels = 35.2 watts per channel. If it's 60% efficient that would be 187.5 watts total, 93.75 to two channels, 46.875 watts if four channel. A highly stable and efficient amp will deliver about twice as much power into 2 ohms as into 4 ohms. Ohms is resistance. There are a few other curve ***** to throw into the formulas but I won't get into that now.