Question about Kenwood 12" 4-Ohm Single-Voice-Coil Subwoofer

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Subwoofers how do you connect a four channel amp to two twelve inch single voice coil over subs

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This will depend on the amplifiers capabilities.

I will give 2 different scenarios.

#1 Stereo configuration

If the amplifier supports an RMS power output close to the RMS input power of the subwoofers then run the amplifier in stereo mode. For example 150 watts RMS X 4 channels driven at 20-20khz. (If you can provide a model # for the subs and the amp your looking at I can help you further with this decision.

Wiring for this is easy and simply involves matching the connectors for 2 of the channels (Front or Rear) to each of the subwoofers.

#2 Mono Bridged mode.

If the amplifier is lower power but mono bridgable you can bridge two Pairs of channels and power each of the subwoofers this way.

Generally speaking a 2 channel bridgable amplifier will be able to at least combine the wattage of each channel into a single monural channel and in many cases its actually higher.

So you would bridge the front 2 channels into a single bridged mode for one subwoofer. and then you could bridge the read 2 channels into another bridged mono channel for your other sub woofer.

For example if you had bridgable amplifier thats 50 watts RMS X 4 you coudl very likely (Generalization based on quality of amplifier) send 150 watts RMS to each subwoofer.

Again I would need to know what amp you're refering to to provide specific wiring instructions. Many Bridging amplifiers either have a single switch that will send them to bridged mode or you would use the positive + terminal from one channel and the negative - terminal from the other channel or a combination of both.

Posted on Jul 07, 2009

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1 Answer

2 ohm amp to 2 10 inch dual coil 4 ohm subs how does it need to be wired


Is the amp a single channel? If so, the only way to connect the subs (without overloading the 2 ohm stable amp) is to wire each sub's voice coils in parallel (2 ohm) and then connecting the subs in series (4 ohms). If the amp is two channel, the subs can have their voice coils connected in parallel (as before) and then each sub connected to its own channel.

Apr 08, 2016 | Dual Car Audio & Video

1 Answer

Have a 4 voice coil sub and dont know how to wire it


OK, first make sure what ohm load your amp can handle. This is always the first step. There are a couple of ways to wire this thing.

1. 2 channel, 2 ohm stable amp. Go from the positive of the left channel to the positive of two of the voice coils. Then go from the negative of the left channel to the negative of the matching voicecoils. Repeat with the right channel to the other two voice coils. You have set up a pair of parallel series. Four 4 ohm voice coils are now two 2 ohm loads.

2. Monoblock amp (single channel) 1 ohms stable amp. Go from the positive of the amp to all 4 of the positive posts on the sub. Then go from the negative on the amp to all 4 of the negative posts on the sub. You now have a 4 way parallel set up giving you a 1 ohm load.

Hope this helps

Aug 29, 2011 | Car Audio & Video

1 Answer

I have 4 wires what do they do I no to of thim will go to my Kicier ame I Ddont no were the other to go


OK, I am assuming that you have 4 wires coming from the subwoofer itself. Your subwoofer has dual voice coils, this means there are two positives and two negatives. Look closely at the posts on the subwoofer and you can tell. These wires will go to your amp, all four of them. Here's the tricky part. You need to know if your amp is a monoblock (single channel) or two channel amp. Also, what ohms is it stable at (4, 2, or 1). If you have a monoblock stable at one ohm, take both positives from the sub and put to the positive of speaker output on the amp. Then put both negatives from the sub to the negative speaker output of the amp. If your sub is dual 4 ohm voice coils, this will give you a 2 ohm load. If you have a dual 2 ohm voice coil sub, this will give you a 1 ohm load. If you amp is 2 channel, just hook one set of positive and negative to one channel and the other set to the other channel. Hope this helps

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2 Answers

I have a alpine type r 15 inch it has two hook ups i cant figure it out i have positive two pos and neg two neg and it keeps cuting out one bridge two amp plz help plz plz


Ok, for starters. Is your sub a dual 4 ohm sub? If so, great. Is your amp 2ohm stable? If so, then great. If you are running one sub, is your amp a monoblock (single channel) amp? Are you running a two channel amp Your subwoofer is a dual voice coil subwoofer. This means that you have to have power to both voicecoils or risk damaging the voice coils. Subs are designed with dual voice coils to give it more control over the cone movement. This results in better reproduction of sound. Anyway, back to wiring.

This is for a monoblock amp (you can also bridge a 2 channel amp) Go from the positive speaker out of your amp to the positive posts of both voice coils. Then go from the negative speaker out of the amp to both negative posts on the sub. And there you have it. It's called a parallel set up. Setting it up this way just dropped the ohms load for that sub to 2 ohms. Less resistance means more power to the sub. Hope this helps

Aug 19, 2011 | Alpine Car Audio & Video

1 Answer

Want to bridge 2 channel amp to push single 4 ohm dvc sub


Hello k_rabbit89,

A 4 ohm DVC sub can be wired in series like you described for an 8 ohm load or the voice coils can be wired in parallel for a 2 ohm load.

If your 2-channel amp isn't stable down to 2 ohms when the channels are bridged (most 2-channel amps are only stable to 4 ohms when bridged), you do not want the voice coils paralleled. The amp will overheat, go into protection mode, and eventually fail completely. A sub with 2 ohm voice coils would be a better fit. That way, you could series the coils for a 4 ohm load and the amp would operate OK with the channels bridged into that load.

But anyway, for the best power from THAT amp to THAT sub, your best wiring solution would be to wire each voice coil to a separate channel. The problem with that is that the signal to each coil needs to be EXACTLY the same or you will have one coil trying to move the cone out while the other one tries to move it in. You can closely approximate identical signals on the output side by using the same input to both channels. Do this by using only one RCA connection (either right or left channel) from your head unit and split it with a "Y" cable.

Hope this helps.

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1 Answer

CORRECT CONNECTION TO AMP BEING A FOUR TERMINAL SPEAKER


Hello i_starling,

The Kicker L7's come in either 2ohm or 4ohm dual voice coil (DVC) versions.

Whatever amp they are connected to, you need to know both the impedance of your L7's and the impedance of your amp. The L7's dual voice coils can be wired to provide a total of four different loads:

2ohm coils in parallel = 1ohm load
2ohm coils in series = 4ohm load
4ohm coils in parallel = 2ohm load
4ohm coils in series = 8ohm load

Your best connection would be the one that results in a final impedance load that is supported by the amp.

Hope this helps.


May 01, 2009 | Car Audio & Video

1 Answer

Car system


if you have dual voice coils connect on each seporate sub negative left channel to possative right channel of the subwoofer same to other sub then conect the left possative and the right neggative to your box power terminal same to other sub then conect the two sub outs on your box left speaker positive to your positive left channel bridge then conect left speaker negative to the right speaker possative then connect your right speaker negative to your right channel negative brigdeg to your amp is single coil hook the box its self up the same way to your amp i have two dual voice cooil 12" hooked up to the same amp that way and it rocks without the power protecter turning on

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1 Answer

Bridging 800a4


That all depends upon whether or not the sub you are running has dual voice coils or just a single voice coil. The 800a4 is a four channel amp; thus the only way you can bridge it will be 3 channel or 2 channel. If you are running a dual voice coil sub then you can wire the amp two channel and get 400 watts x 2 @ 4 ohms. Make sure that you sub can handle this kind of power though.

Here are the specs:
4 x 100 @ 4 ohms (13.8V - <0.05% THD)
4 x 200 @ 2 ohms (13.8V - <0.10% THD)
2 x 400 @ 4 ohms bridged (13.8V - <0.10% THD)
Fuse: External 60A
Manufactured in 1999 - 2001

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3 Answers

USING 1 CHANNEL


I can't find any documentation for your amp; it was made when Jensen was owned by Recoton, and they're no longer in business. With any 4-channel amp, you can't bridge all four channels into a single channel. What you can do, if you're connecting it to a single sub, is to bridge two of the channels into one channel and leave the other two channels unused. It doesn't usually matter which two channels you pick, but some 4-channel amps designate channels 3 and 4 (or rear channels) for the subwoofer. Whichever ones you use should have a "LPF" or "LP" crossover setting available.

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