Question about JBL BP150.1 Car Audio Amplifier

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I need help, amp OVER heating too much (i think)... Please help

Ok, i have a "boss REV-650 4 channel amp" and have 2 audio pipe (dual voice coil). so what i did was to "bridge" the subs thinking i will get more power. so i connected; The first sub: + (on sub) to + on first channel, then - (on sub) to - on second channel of the amp (thats supposed to be briged). So i did the same thing on the other one (but in channel 3 and 4). And yesterday i was driving with the radio at 25 of 34 (a little loud) so i noticed that suddenly the bass turned off, so i turned off the radio scared then like 2 minutes later i turned the radio on again and the bass kicked in again it was like that for like 3 minutes then suteddown again. When i got home and opened the trunk (the trunk actually was hot) so i touched the amp and almost fryed my hand there. So my question is: is the amp damaged?, am i wiring wrong?, what should i do?. If it helps... i dont have an equalizer (preamp) is directly to radio, my radio is a sony xplod cdx-gt100, the power wire is 4 gauge (same as the ground), i dont have a capacitor and the amp says it should be briged that way what id dont know if is because the subs are dual voice coil is different also the amp is 2ohm stable. Thanks in advance

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Re: I need help, amp OVER heating too much (i think)......

I think your load is too low... each sub when wired in parallel can potentially be 2 ohm or 1 ohm depending on if each voice coil is 2 ohm to begin with,,,,this will cause a clipping situation as described and the over heating problem as described,,,,my email is if you have a digital camera send me some pics including speaker model numbers...I await your information so I can help you... good luck

Posted on Jun 30, 2007

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First of all. Using two different kinds of sub woofers, is not an option, as these two sub woofers have different specifications and you should never mix sub woofers. Now the better choice from the 2, would probably be the Rockford. (cant be sure without knowing the models, power handling is also a factor in how well either of the sub woofers will play, but Rockford as a rule makes better sub woofers than Sony does) In my opinion, both the sub woofers deserve a better amplifier than what Boss has to offer. However to connect either of these sub woofers, you would need to determine how many voice coils it has and how many OHM the voice coil/s are. If it is a DVC (dual voice coil) and each voice coil is 4 OHM or 2 OHM, then you can connect one voice coil to one channel of the amplifier and the other voice coil to the other channel of the amplifier. If it is a DVC 2OHM you can also connect it wired in Series/Series to give a 4OHM load and should be connected to the BRIDGE dedicated speaker outputs of your amplifier. If it is a SVC (single voice coil) and it is 4 OHM, then you can connect the sub woofer to the designated speaker outputs of your amplifier that states BRIDGE. DO NOT run the amplifier in BRIDGE mode at 2 OHM as this will probably damage the amplifier. dreamsystems

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moz-screenshot.pngthis is the best way if it is a dual 4 ohm ....


this is the best way if it is a daul 2 ohm sub...


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Whats the best way to hook up a 12 inch dual voice coil insignia subwoofer spkr to a 4 channel 650 rev boss amp

Well without seeing a spec sheet on the amp and not knowing your voice coil impedance I will assume the following. If the speaker is dual 4 ohm voice coil the in parallel it would present a 2 ohm impedance to the amp. If this amp is stable down to 2 ohms bridged then that would be the hookup of choice. If it is not stable to two ohms with one speaker it will be tough to get full performance out of your amp. You would have to series the voice coils which would then present an 8 ohm impedance to the amp. Just look at your amp's manual before making the decision. My suggestion would be to get another one of those subwoofers parallel the voice coils on each then wire the two subwoofers in series. This would give you a 4 ohm load which your amp is almost certain to be able to drive.

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scanman84: i would recommend using the 2 channel 300W amp to drive the dual voice coil alone. i wouldn't combine the single channel amp with the 2 channel. you can't tie the 2 channel outputs together & use that on 1 voice & attach the single channel amp to the other, plus there could be slight differences in amplification & timing which, could cause the sub to have minimal movement or cause a canceling effect which would reduce the spl, sound pressure level. if you need more volume use the lowest impedence speaker recommended by the amp's mfg & if you need serious volume, go with a higher output single 2 channel amp. just make sure you have sufficient wire size to handle high powered amps. example, 8awg wire is rated for 73 amps. also make sure the amp is well grounded with nut & bolt connections to the frame & that there is good ventilation.


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The specs I read on the Pioneer site say the amp is not 1 ohm stable, so keep that in mind.

It partially depends on the impedance of each voice coil on the DVC subs. If they are dual 4 ohm, and you connect the DVCs in parallel ("+"s together, "-"s together), you could run a sub on each channel of the amp(s). This would put about 200W on each sub.

The other option is to still tie the dual 4 ohm voice coils in parallel, tie 2 subs in series (one "+" to the other "-"), and bridge the two channels of the amp (aka put them in parallel). But this, also, would be about 200W on each sub.

Things get different if the subs have dual 2 ohm, 3 ohm, or 8 ohm voice coils.

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