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How many watts RMS for two subs?

If I wire two subs rated with an RMS at 250 Watts in parallel to an 800 Watt amp, would I blow my speakers?

  • I am pretty sure that I am not getting my full experience out of my subs. I know if I wire them in parallel then I will get half of the ohms which will give me twice the power. But I am worried I may blow it then. My speakers are two 10" MTX subwoofers rated at 250 watts. My amps is an 800 watt Kenwood. Here is it's rated power output specs: @4 ohms, 20 Hz to 20kHz, .08% THD = 150 W x 2 @4 ohms, DIN: 45324, +B =14.4V = 150 W x 2 @2 ohms, 1 kHz, .8% THD = 230 W x 2 Also, my radio has a speaker impedance of 4 to 8 ohms. I don't know if this will affect it any but can you help me out? By the way, what will I have to set my input sensitivity to so that I have no problems?

  • Answer:

    That amp will work fine. Don't get caught up in "if the subs rated at 250 RMS, you have to have an amp that puts out 250 watts RMS." That's not how it works. 250 watts RMS simply means the subs can endure 250 watts of clean music for a long time. It doesn't mean you have to give it that many watts. Think about it this way. When you don't have your stereo turned up all the way (let's say 1/4 of the volume for casual listening), you're only sending about 20 watts to each sub. EDIT/UPDATE:...........................… Since you hooked up the subs in parallel to your amp, bridged, you'd dropped it down to a 2 ohm load and putting undo strain on your amp. That's why your question wasn't answered, because the amp you have isn't made for that. I guess sometimes people just need it spelled out for them... DON'T DO IT!!!! The subs aren't what you should be worried about. It's the amp. The amp is going to overheat and 'hopefully' go into protection mode. If it doesn't have a protection mode, it'll start blowing fuses. If it doesn't do that, it's going to blow at least one internal transistor, but likely more than one. Hook it back up the way it was, or go exchange the amp for a more powerful one while it's still worth something, before you blow it up and it's worth nothing.

Beast@Li... at Yahoo! Answers Visit the source

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if you have 2 sub woofers that are rated to handle 250 RMS each you need a class d or mono amplifier that is putting out 500 RMS.they must be added together no matter how many sub woofers you run.most sub woofers are rated to run at a 4 ohm load but not all,they have 2 ohm sub woofers to.the RMS rating is the continuous power a class d amplifier can make and a sub woofer can handle,and these are the numbers you should be looking at when matching up an amplifier to a sub woofer.if using a channeled amplifier to run the sub woofers they have an RMS rating to,they give it to you per channel and in a bridged mode to run sub woofers.switched to low pass or lp for running sub woofers.go to eBay then car audio and take a look around they have many new and used amplifiers at that site and look at the old school stuff its great and very underrated for power.youtube.com has many how to videos on car audio.hope this helps you out.going by your total watts is not the way to go when picking an amplifier the RMS rating is and if you can't find this rating the equipment is not worth buying.some company's out in out lie about there RMS rating,so stick with name brand equipment.

Charlie

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