Dual Voice Coil Subwoofer Question

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pspadotto

Member - Posts: 19

Joined: March 08, 2004

Location: United States

Posted: March 22, 2004 at 12:47 AM / IP Logged

I was hoping someone might be able to help me out with this question:

I'm setting up my ford focus with a 2 ohm DVC subwoofer. I have a 2 channel amplifier that runs:

200 watts RMS x2 channels @ 4 ohms

300 watts RMS x2 channels @ 2 ohms

400 watts RMS x1 channel (bridged) @ 4 ohms.

Now, I read on crutchfield that a DVC subwoofer can have an individual channel from an amp connected to each coil, rather than a bridged single channel. If this is true, and I connect each of my 300 watt channels (@ 2 ohms each) to a separate voice coil, will the output on the subwoofer be combined to 600 watts? If so, I'd much rather do that than settle for the 400 watts at 4 ohms bridged.

-Pete

thapimpfromchi

Silver - Posts: 616

Joined: July 30, 2003

Location: United States

Posted: March 22, 2004 at 2:38 AM / IP Logged

Yea it's true. You can wire each VC to a seperate amp, but I wouldnt recommend it. It's alot harder than it sounds. you have to get crossovers (i think) to make sure each amp gets the exact sam signal, and puts out the same signal. If they arent operating in sync, bye bye woofer. But, since you are willing to get another amp, why dont you just go out and buy an amp that has some more power, and wire both VC's to one amp?

1990 Honda Civic HB:

Clarion DXZ545MP H.U.

2- 6.5" Power Acoustik interiors

Diamond Audio 600.1 amp

Diamond Audio 15" M6MKII

Pyramid PB881X 4 CH. Amp

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pspadotto

Member - Posts: 19

Joined: March 08, 2004

Location: United States

Posted: March 22, 2004 at 8:06 AM / IP Logged

Actually, I was more thinking that I would wire each channel from my existing 2 channel amp to a separate voice coil...is that possible? And what would the wattage work out to, given the RMS listed above?

DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: March 22, 2004 at 8:22 AM / IP Logged

If you wire each 2-ohm VC to its own channel, with the amp specs you list you would deliver 300 watts to each VC. The trick to making this work without tearing your sub apart is to make sure you are sending the exact same signal to each channel of the amp. If your HU has a mono sub output, use a Y-cable and split it to each channel. DO NOT run a stereo signal to the amp.

pspadotto

Member - Posts: 19

Joined: March 08, 2004

Location: United States

Posted: March 22, 2004 at 11:52 AM / IP Logged

That makes a lot of sense, and it was along the lines that I was thinking. Now, with 300 watts going to each voice coil, what is the total wattage being put out by the sub, 300 or 600? Thanks again!

DYohn

Moderator - Posts: 10,741

Joined: April 22, 2003

Location: Arizona, United States

Posted: March 22, 2004 at 1:18 PM / IP Logged

The total wattage being CONSUMED by the sub will be 600 watts at full volume, assuming the amp ratuings are correct. The power OUTPUT will be measured in decibels.

forbidden

Platinum - Posts: 5,352

Joined: November 01, 2003

Location: Alberta, Canada

Posted: March 22, 2004 at 1:42 PM / IP Logged

I would disagree with the amps listed power rating, usually the 4 ohm bridged mono rating is equal to or slightly more than the 2 ohm stereo load. What amp is this that you have, let's double check it's "specs". Post the sub for us as well please.

Top Secret, I can tell you but then my wife will kill me.

thapimpfromchi

Silver - Posts: 616

Joined: July 30, 2003

Location: United States

Posted: March 22, 2004 at 2:24 PM / IP Logged

hey man, using the mono wire and using a y splitter, wouldnt he have to reverse the signal to one vc? I had set up 2 SVC subs, with a single rca and a Y splitter, but it sounded horrible. i reversed the one speaker and it was great.

1990 Honda Civic HB:

Clarion DXZ545MP H.U.

2- 6.5" Power Acoustik interiors

Diamond Audio 600.1 amp

Diamond Audio 15" M6MKII

Pyramid PB881X 4 CH. Amp

pspadotto

Member - Posts: 19

Joined: March 08, 2004

Location: United States

Posted: March 22, 2004 at 2:29 PM / IP Logged

The Amp is a Visonik V217SX. I can't for the life of me remember the model number of the sub right now. I'll post it after I get home from work.

DYohn

Moderator - Posts: 10,741

Joined: April 22, 2003

Location: Arizona, United States

Posted: March 22, 2004 at 2:38 PM / IP Logged

That amp is actually more like 2 X 150 or maybe 200 watts into 2 ohms. It may say "800 watts" on it, but that is a load of, err, buffalo flush.

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