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I have an Alpine CDA-9815 head unit installed in a 2002 Dodge Dakota. I currently have a 12" DVC sub bridged at 4 Ohms. My head unit's volume goes up to 35. When i turn in past 24-25, the head unit resets itself. It completly powers down and comes back up. What is going on?

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It sounds like the sub woofer amplifier is pulling down the voltage level in the truck when it starts to get really loud. It may be the voltage regulator which is probably part of the alternator, or the alternator is not capable of supplying the needed current for the amplifier. If the voltage level drops below a certain level, the radio will see it as if the battery is disconnected. It requires a voltage level of around at least 10 volts to stay turned on. When an amplifier is playing loud, it draws a lot of current. If the current supply does not increase, it lowers the voltage level to compensate and get the current it needs to play at the level the head unit is pushing it to. As the voltage level goes down, the current increases when the voltage is dropping due to increased demand. You could check this with a voltage meter and monitor the level right at the battery and have somebody turn the volume up on the head unit slowly as you monitor the voltage level. The normal operating voltage of a car while the engine is running is about 14.4 volts. It should not drop much at all, no matter how loud the amplifier is playing. if it does drop, you have a problem with the trucks regulator or alternator.

I hope this helps, if you need more assistance let me know.

Dave

Posted on Jul 08, 2008

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What is the best way to wire two kicker comp r 12' s to a two channel amp for max bass?


First, you need to know whether you have the 2 ohm DVC subs or 4 ohm DVC subs. Second, you need to know the minimum impedance the amp can handle (most are 2 ohm, some are less). Putting two voice coils in parallel will cut the total impedance in half (e.g. 2x 4 ohm voice coils in parallel = 2 ohms total). Putting subs in parallel will also cut the impedance in half.
At one end of the spectrum, you could put the 2 ohms DVCs in parallel, then parallel the two subs, and bridge the 2 channels of the amp. That would put 0.5 ohms impedance on the 1 bridge amp channel. If the amp can do 0.5 ohms x 1ch, do it. Otherwise, you may have to run the subs on separate channels.

Oct 23, 2015 | Kicker Car Audio & Video

1 Answer

Ok I have 2 12" cerwin Vega dual voice coil woofers if they are 4 ohm dual coil each,,,each one is wired to 2 ohms,,,should I connect each woofer together to make them 1 ohm and put them on a mono amp or...


First you cannot run 2 dvc 4 ohms at 2 ohms its either 1 ohm or 4 ohm. and yes you should bridge them better performance and power. i have looked it up for you and this is your 2 options at running your subs.

Aug 21, 2014 | Car Audio & Video

1 Answer

I have a 12" d4 type r 1000 rms and a alpine 1000 amp speaker sounds great but smells like something is burning, my amp never over heats or shuts down but the smell is still coming from the sub?


Cut your gain back on the amp. It sounds like they are set too high. Check your install instructions on how to set your gain. If you have a 4 or 5 volt output head unit your will not be at half way. Im running a JL Audio 500 /1 on a skar wwv10 dvc in a ported box. My gain is set about half way & its plenty loud.I have a Alpine 9887 headunit 5 volt output on my RCAsI can take a volt meter & set my speaker output at 45amps & my gain in perfect.

Apr 28, 2014 | Alpine Type-R SWR-1242D Car Subwoofer

1 Answer

I got two 12'' 800rms subs n a powerbass asa600.2 class a/b amp i need to kno the best wiring diagram... subs are dvc 4ohm & the amp is 4ohm 2ohm & can be bridged to 1 channel..


Use good quality wires-- the cost is the factor for high connectivity with low resistance- You can bridge the two sub's in parallel to the 2 ohms output of the amp. Please be careful to see the likeness of polarity of the subs to the amp. or lese you will get a phase difference resulting in poor low frequncy.

Jun 25, 2010 | Car Audio & Video

1 Answer

4ohm dual VC alpine x sub is actually 3ohm DVC i blew my 2 seperate JL audio g-max 1200w amps. what should i do with these subs?(i have 2) is there any amp that can put out 1000rms+ at a 3ohm load per sub?


Well if it is not dual 4 ohm, i have never heard of a sub with dual 3 ohms. There must be something wrong with the voice coils and if that is not it, I dont know.

Feb 11, 2010 | Alpine SWX-1042D Car Subwoofer

1 Answer

My subwoofer is cutting off. I replaced to fuse on the main power, and it works when I have the source on a very low volume level but when I turn the volume up, it cuts off. I have 1 alpine type R12 and a...


You are probably running the ohms too low for the amp and its drawing too much current. Consult your amp manual for proper load level capacity and you can wire it accordingly. More then likely its only 4ohm stable bridged and your running it at 2 or less depending on if your subs have single or dual voice coils. Try connecting one pos speaker terminal to the other speaker neg then run the left ofer pos on one speaker and the the left over neg directly to the amp (series) I will raise the ohms (amp makes less power) but should not cut off unless the subs ohm are still to low, if this is the case you need a sub with a higher ohm rating or an amp wiht a lower rating...

Nov 13, 2009 | Alpine SWR-1222D 12" Type-R Series...

1 Answer

How do i bridge 2-4ohm dvc's to a mono block


If you have a DVC 4ohm speaker, and you are using both voice coils, the amp is seeing a 2ohm load.
If you bridge the amp, you CAN run both subs as long as the amp is Two Ohms Stable.
Wire each subs voice coils in parallel.(Positive to positve, neg to neg.) (2ohms) each.
Then wire the two subs in series.(Neg from amp to neg of sub one, pos of sub one to neg of sub two. then pos of sub two to pos of amp.

If it sounds too hard, leave it as you are already running the amp at two ohms.

Sep 13, 2009 | 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.

Sep 12, 2009 | Car Audio & Video

2 Answers

Wires


Hi Gott Mudd,

 

I can relate to feeling it in the bones. You got the stuff to do it.  You should try the Alpine MP3 head units with bass boost, those are bad to the bone.

 

Wiring: 

 

Amp to Speaker I like to use the code VC for Voice coil, and AO for Amplifier output.  Also + for positive.  If I say VC1-, I am referring to the first connector starting left to right on the Alpine Sub. Now I have not seen a Kicker KX1200.1 amplifier.  All I see are MRA, MRP, or PDX prefix on the part numbers. So take what I am saying as a guess. You may want to revisit looking at the model of the amp to be sure your giving the right information.

 

We are going for  2 Ohms. Paralleling the two subs, not the voice coils. The voice coils will be series.  Bridge the amp if necessary to get mono channel. only using AO+ and AO- for output.

 

AO+ to Sub1VC1+

AO+ to Sub2VC1+

Sub1VC1- to Sub1VC2+

Sub2VC1- to Sub2VC2+

AO- to Sub1VC2-

AO- to Sub2VC2- 

 

Set your Crossover to LPF

Adjust the bass gain down to lowest until you test.

Set the Frequencies to midrange between 40 and 100hz  

 

Your box can be ported or not. It depends on the space your have.  If you do not have much room, go Enclosed and build a box that the inside space is less than 1 cubic foot.  Make sure you give barely  enough clearance for the speaker to fit.  If you have room, Go with a box and vent it with a 3 inch Vent tube 10 inches long.  

Oct 15, 2007 | Alpine Type-R SWR-1242D Car Subwoofer

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