Question about Pioneer Car Amplifier GM-5100T - 2CH 760 Watts Car Audio Amplifier

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I have a Sony Xplod 12" Sub. with a Rated Output of 380W and 1200W peak power. I have powering that, a Pioneer GM-5100T 2-Channel Power Amplifier with 760 Watts Max Power.
Now my question. I was given a perfectly fine Sony Xplod the same as above, but the amp isn't enough for both. I'm thinking sell the amp I have and buy one that will power both subs. FYI. I installed this all myself without knowing much about how amps and subs work in any detail...anyone with knowledge would probably laugh hysterically at the setup (or lack thereof). If you answer, please explain in detail if necessary. So, what is the max power I need in a amp to power the 2 subs? Thanks in advance!!

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Actually the amp should be able to power both of your subs. You have a 2 channel 760 watts amp
380 x 2 = 760 watts. If you want to go with a more powerful amp I would go with a 2 channel 2400 wats amp 1200 per channel = 2400 watts total. Which the peak power of your subs if you go over 2400 you have the risk of blowing your subs easily.

Posted on Jan 22, 2009

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You are going to need an amp that can supply the right amount of rms power to make it sound good. these sony subs are rated for 380 watts rms. so in order to find an amp that will supply two, you must multiply that figure by two. so you will need an amp that can supply around 500 to 750 watts continuously (or rms). also you are going to want an amp that is either class d or class ab rated. these amps are built to push subwoofers exclusively and will give you the best efficiency and sound out of your subs. you will also want to get an amplifier is a monoblock amp, and not a stereo amplifier. make sure the amp can put out that rms rating at 2 ohms as two 4 ohm speakers equal 2 ohms wired in parallel. i have a kenwood kac9152d that puts out about 2000 watts max at 2 or 1 ohms (900 watts rms) that i used with my two sony xplod 10's for about 2 years. it was kick ***! now i dont know if you need that much power but they will handle it as long as you dont push them too hard for long periods of time, otherwise you might end up blowing them up! (depending on the box size that is, and the quality of it as well...)

i have years of car audio installation experience and can help with setting up and wiring any mobile entertainment system you can imagine. may i ask what kind of music you listen to and what kind of box do you have for these subwoofers?

if you have any questions email me at thadoggma420@hotmail.com

Posted on Jan 22, 2009

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Kicker 12L5 blew from a kicker zx750.1


MY BEST GUESS FROM WHAT YOU HAVE SAID IS THAT THE BOX WAS TO SMALL. BUT YOU ARE OVERPOWERING THE SUB RUNNING IT AT 2 OHMS ON A 750 WATT AMP WITH A SUB THAT IS ONLY RATED FOR 600. NO MATTER HOW FAR YOU TURN YOUR SETTINGS DOWN, YOUR STILL PUSHING TO MUCH POWER FOR THE SUB TO HANDLE. IT IS ONLY RATED 600 WATTS FOR A REASON. ESPECIALLY IF YOU LISTEN TO MUSIC THAT HAS A REAL LOW END AND THEN A HARD HIT. REMEMBER A HARD HIT WILL SPIKE YOUR AMPS OUTPUT THEREFORE PUSHING MORE WATTAGE TO THE SUB.

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Here are the specs for the AMP:
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    • Warranty Terms - Labor 1 year limited
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    • Product Weight 7.8 lbs.
    • Product Depth 6-1/2"
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    • Cutout Diameter or Length (inches) 12"
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    I'm assuming the subwoofers were bridged and couldn't handle the power. Make sure you have atleast 300 watts peak power wattage.

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    Amps can be rated based on their RMS power or their peak power. In this case, the amp's rated RMS power is 300x2 at 2 ohms (total 600W RMS) with a peak power rating of 600x2 (1200W peak). For the most part, peak power means almost nothing.

    If your head unit didn't have RCA preamp outputs, you would used the standard speaker outputs from the head unit and connect them to the hi input plug of the amp.

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    Can it power the subs? Yes.

    Can it make them crank? Well, that all depends on your expectations. That amp/sub combo is going to give each sub about 125W, which isn't much. But if it's what you have, it's better than nothing. You might also consider using only one sub and bridging the amp. This would put about 340W on the one sub, which is much more reasonable.

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    400 watts delivered to 300 watt speakers the only way to do this would be to wire two subwoofers in series so that the power needed to drive them will be 600 watts to max, however this will increase your impedance on the speaker (8 ohms) load so what you can do to compensate is get an 8 ohm 600 watt resistor and put it in parallel with the speakers you will then have 4 ohms of impedance at a total capacity of 600 watts of power In other words the amplifier won't blow these out now.

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