Can the IRFP250 be used to make an audio amplifier for running small subs

Need the full description of your audio setup including manufacturer and model numbers and how they are installed.

If your sub woofers are SVC (single voice coil) 2 OHM each, then connecting one to each channel would make the amplifier run in 2OHM stereo Then again, if your sub woofers are 2OHM each, it would be better to connect both together in series and connect them to the BRIDGE specified speaker terminals of your amplifier making it run a 4OHM load into one channel. This will give you all the power the amp can give and still run stable. A 2OHM load into one channel will likely damage your amplifier. Do not forget to set the LPF (low pass filter)on if you are going to use the amplifier to run sub woofer/s. dreamsystems

You should get the dual 4 ohm version of subs and wire them both in parrallel and series for a 4 ohm load to that amp, Bridge the amp and your subs should be seeing about 960 watts true rms.

first of all you should check the minimal impedance your amp handles , if is class d it should handle between 1-2 ohms total impedance in a mono conection , meaning whatever quantity of subs you have hooked to your amplifier,their total impedance should the minimum the amp handles that way all the power from your amplifier will be used.

If the impedance you are presenting to the amplifier is lower than its rated maximum load then the amp will go into thermal shutdown due to excess power being disipated from the transistors.

Hello ronnieyannon,

Yes. As long as the subs are paralleled, the final load is 2 ohms.

Hope this helps.

forget hooking this on a subwoofer. this amp produces only 50 watts per channel at 4ohms or 70 watts per channel at 2 ohms RMS...
If you try bridging the sub, it will only give out maybe 100watts bridged.
So..... if your sub is, lets say 1000watts RMS, youre just going to bust your amplifier to smoke...
Find a more decent and powerful amp. This amp is only intended for separates and lowend subs with an RMS of 80 to 150 watts

the amp is no where near strong enough that sound you hear is called hard clipping and it will destroy your subs in minutes. depending on what model JL subs you have I can sell you a better amp.

Just had a look at both amp and sub on the JL Audio website. The amp runs from 1.5-4ohms. 4ohms at 14.5V. The sub is running dual 4 ohms coils. That's what the D-4 means. So should be an easy set up. The amp has two mono outputs, so one for each coil. It looks like the perfect wattage to run the sub real nice.
Web page for amp: http://mobile.jlaudio.com/products_amps.php?amp_id=439
Web page for sub: http://mobile.jlaudio.com/products_subs.php?series_id=18

You will probably need to use a Line Output Converter (LOC). They're available at virtually any shop that sells car audio.

Many times, the outputs of the OEM amplifier will have significant DC voltage on them. This could damage the input circuits on the kenwood amplifier.

Let me know if you have any other questions.