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Old 06-18-2004, 03:09 AM   #1 (permalink)
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Subwoofer question

i saw a two different subs for the same price. but one has 2 ohms and one has 4.

can someone please explain this difference to me?
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Old 06-18-2004, 03:35 AM   #2 (permalink)
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Ohms = resistance.

Theres also svc (single voice coil) and dvc (dual voice coil) subs.

DVC offers more wiring options.
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Old 06-18-2004, 06:17 AM   #3 (permalink)
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Now the question is at which ohmage does your amp provide the most power. Match the sub with the amp.
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Old 06-18-2004, 08:23 AM   #4 (permalink)
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which 2 subs did you see?
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Old 06-18-2004, 09:02 AM   #5 (permalink)
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We need to know what amp you are talking about first, most class ab amps run best at 4 ohm bridged, and class D can go down to 1ohm, so it really depends on the amp you have.
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Old 06-18-2004, 12:16 PM   #6 (permalink)
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hmm

i was looking at the Alpine MRD-M301.

and the SWR-1221D (2ohm + 2ohm) or SWR-1241D (4ohm + 4ohm) Alpine subs.

but the M301 has

175 watts RMS x 1 at 4 ohms
350 watts RMS x 1 at 2 ohms

so i'm assuming i should get the SWR-1221D because the amp has more power at 2 ohms?
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Old 06-18-2004, 12:34 PM   #7 (permalink)
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No, you need the SWR1241D because your amp has more power at 2 ohms. When you wire up two voice coils you must do so in series or parallel. This changes the overall ohm rating of your speaker. A dual 2ohm speaker can be wired up in either 1 or 4 ohm operation while a dual 4ohm speaker can be wired up in 2 or 8 ohm operation.
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Old 06-18-2004, 12:55 PM   #8 (permalink)
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whoa! thanks for the info
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Old 06-18-2004, 01:50 PM   #9 (permalink)
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Or you can get a single 10 image dynamics IDQ10V.2 D4
or even a 12 IDQ12V.2 D4 and port it, those alpine R are not bad, just thowing other options at you.
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Old 06-20-2004, 04:52 PM   #10 (permalink)
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since you seem to know alot about systems, i was wondering...

i have an Alpine HU, and i heard that if you're gunna go Alpine, you better go all Alpine. is this true?
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Old 06-21-2004, 08:43 AM   #11 (permalink)
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No and that's absurd.

Alpine makes decent equipment across the board, but they excel in head units. They make decent speakers, subs and amps but there is better for the money out there. Their Type R sub is a nicely priced speaker for the results.
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Old 06-21-2004, 09:11 AM   #12 (permalink)
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Quote:
Originally posted by MykeLefty
since you seem to know alot about systems, i was wondering...

i have an Alpine HU, and i heard that if you're gunna go Alpine, you better go all Alpine. is this true?
Definitely not. It is always better to mix and match brands. One brand might make awesome head units, but it doesnt mean that i makes awesome speakers and vice versa. I too would second the id subs. I got an IDMAX, and have heard the other id subs and they are all good.
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Old 06-21-2004, 10:56 AM   #13 (permalink)
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in your opinion, are Power Acoustik amps better than Alpine?
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Old 06-21-2004, 11:11 AM   #14 (permalink)
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okay, so i just looked at those Image Dynamic subs on eBay, and i must say they are beautiful subs, but they are about 3x as much as the Alpines.
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Old 06-21-2004, 11:42 AM   #15 (permalink)
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Quote:
Originally posted by JaJay721
No and that's absurd.

Alpine makes decent equipment across the board, but they excel in head units. They make decent speakers, subs and amps but there is better for the money out there. Their Type R sub is a nicely priced speaker for the results.
X2

Alpine carries the F-series, which is top notch stuff, I would love there PXA-H900, but you would definitely need a fat wallet to invest. Mixing and matching is very common, I like to keep my amps matching, but as far as HU, speakers, sub, I get what sounds good to my ears.
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