car sub/amp

**I800C0LLECT** · 08-01-2009

Forgive me...I havent' read anybody elses post.

If your Alpine Subwoofer is Dual Voice Coil (DVC) then you MUST MAKE SURE IT'S RUN IN SERIES!!!!!

Bridged amps these days can only take a 4ohm load when bridged. That's it..final..done. You're lucky your amp has a shut off. If you don't have a DVC Sub we'll have to speculate some more.

Here's a diagram to help

Subwoofer Wiring Diagrams, One 2 ohm Dual Voice Coil (DVC) Speaker

**grand2000prixgtp** · 08-01-2009

Originally Posted by Gregorius

Yes. If possible....

I missed this post of yours:

" it a new amp just got it today. i did turn it down but then i cant hear the sub.and a guy i work with told me about the amp cause he has the same sub as i do (i sold the sub to him) and the amp works fine with his."

If you are SURE the subs are exactly the same, and you bought the same model Pioneer as he did, something is broken.

Hook up the sub to one side of the amp, run it hard for a few minutes, then try the other side. That will test the amp and the sub, and verify that nothing is broken, and that you have a 2 ohm SVC sub.

Is there 2 sets of posts on the sub? red black and on the other side red black? If so it's Dual Voice Coil......

ok the sub model is swr-1221d. it has 2 red post and 2 black.

**I800C0LLECT** · 08-02-2009

Please refer to my post one above yours...it'll fix your problem.

**Gregorius** · 08-02-2009

Originally Posted by grand2000prixgtp

ok the sub model is swr-1221d. it has 2 red post and 2 black.

Power Handling: This woofer has a total RMS power rating of 300 watts and a total peak power rating of 1000 watts. Each voice coil carries an RMS power rating of 150 watts and a peak power rating of 500 watts.

Perfect. A good match for the Pioneer amp. Set the input gains on the amp at at 75-80%, and simply run each coil to one side of the amp. Don't use bridge mode.

channel 1 + --------- redpost 1
channel 1 - ---------- blackpost 1

channel 2 + --------- redpost 2
channel 2 - --------- blackpost 2

2hm loads that fully utilize the Power of the amp, and the amp has a little bit more power than the subs should really take, so keep the gains down about 25% and guarantee clean output, and safe subs. I'd put the back of the Box against the backseat inside the trunk either pointing up or towards the rear. Should bounce nicely for only having 1 sub. The amp will probably run almost too hot to touch after a good cruise, but should never shut down, if setup up as above. If that setup gives you any problems .... buy new stuff

**Gregorius** · 08-02-2009

Originally Posted by I800C0LLECT

Please refer to my post one above yours...it'll fix your problem.

Nope. Love the illustrations, but they don't really cover his setup. He should use both sides of the 2 channel amp. I suppose he could series the coils to the amp in bridge mode and get the same results. However, channeling each coil seems more natural, bypasses a couple of circuits inside the amp for a cleaner sound, and lets the natural impedance of the VC's compensate any manufacturing variances inside the amp. Plus the wires going to the coils carry less current individually, which is a plus, if like most people your just using 10-12 ga. for the speakers.

I forgot about the12volt com, haven't been there in ages.

**I800C0LLECT** · 08-02-2009

I'll admit...I didn't expect RMS handling to be that low...but that's what setting gains properly are for

Majority of sub freq's can handle up to 10-15% distortion before an individual readily notices. Channel separation and "clean" amps aren't as big of a deal. That's why SQ oriented installs don't focus on the subs as much.

**I800C0LLECT** · 08-02-2009

And now that I think about it...you don't want his DVC's in stereo? I think we should go over this approach again....

Bridged to Series please :/

**Hawkins97** · 08-02-2009

I'm thinking that ur amp wire isn't a big enough gauge to take the consuption of the amp. And plus you could do what i've done.. run ur wire from ur battery back to a compasitor. Remember every 1000 watts is equal to 1 fared. Example 2500 watts = 2.5 fared. With this you will never have amp shutoff or dimming of interior or exterior lights.

**I800C0LLECT** · 08-02-2009

16awg wire is all he needs...not sure what he's running? I probably missed it in his post.

WIRE

I'm of the opinion that caps don't help anything :/

Grand Prixs Of North America • View topic - Capacitor Info

**eddie97gt** · 08-21-2009

well the type r are all dual voice coils but they made a dual 2 and dual 4 if its dual 2 you want to series the coils aka run a jumper from positive of one coil to the neg of another and run that to your amp ... or just take the amp back and buy a mono block and that should solve all your problems . The type r is a very good sub and try to buy the little alpine mrp-500 its only about 200 bucks and works great with the type r if its a dual 4 . but if its dual 2 ohm stick with the 2 channel you got

**I800C0LLECT** · 08-28-2009

OP...was this ever resolved?

Quick summation...

Equipment
1)Dual Voice Coil Subwoofer
2)Two channel Pioneer amp

Fix
Bridge the amp and run the coils in series.

Reason
The Pioneer amp is stable at 4ohm when bridged. The Voice coils MUST be run in tandem. Meaning they must receive the same signal or else you'll jack up your sub [refer here: http:]//electronics.howstuffworks.com/speaker5.htm

Therefore, you must run the coils off the same channel. To get the most out of your Pioneer amp you would need to bridge the channels. BUT!!! You're Pioneer isn't stable below 4ohms when bridged. That's why you must run the voice coil in series. [refer here: Subwoofer Wiring Diagrams, One 2 ohm Dual Voice Coil (DVC) Speaker]

Thread: car sub/amp

Thread Tools

Display

Bookmarks