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2 ohms or 8 ohms?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=56765
Printed Date: May 10, 2024 at 2:04 AM


Topic: 2 ohms or 8 ohms?

Posted By: dirty651
Subject: 2 ohms or 8 ohms?
Date Posted: May 31, 2005 at 8:38 PM

i have two alpine type-e subs(4 ohms each). my amp operates 4-8 ohms. whats the sound difference from the subs in 2 ohm load compared to an 8 ohm load?



Replies:

Posted By: DYohn
Date Posted: May 31, 2005 at 9:33 PM
None.  The difference is only for wiring flexibility.  Connect them to your amp for a total 4 ohm load.

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Posted By: boardinbum
Date Posted: June 01, 2005 at 12:59 AM
Sorry to second guess you, DYohn since you're definitely more knowledgeable about these things than myself.
But how would he hook two 4ohm subs up for a total of a 4ohm load?




Posted By: samroza
Date Posted: June 01, 2005 at 1:37 AM

I'm not one to second-guess you either, DYohn, but the only way I can think of to get 4 ohms out of those 2 subs is with one sub on each channel of a 2 channel amp, or possibly with some impedance-matching circuitry.

I am an unthinking n00b, however and I don't know one tenth of the tricks you do for sure...



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Posted By: stevdart
Date Posted: June 01, 2005 at 6:44 AM

Ahh, you guys didn't do your homework.  Nothing wrong with that answer.  The Alpine Type E DVC 4 ohm sub can be wired to either 2 ohm or 8 ohm.  There is no audible difference either way in the sub.  Two of these will make a final 4 ohm load on the amp.  (The poster can't be talking about a final 2 ohm load on the amp because he states that his amp operates 4 - 8 ohms...)

I'll add, though, that series/parallel wiring is the preferred way....wire coils in series, subs in parallel.

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Posted By: DYohn
Date Posted: June 01, 2005 at 8:19 AM
Yes, thanks steve I assumed they were the DVC models and he was asking about 2 or 8 ohms EACH.  If they are SVC subs then obviously it's 2 or 8 total.  The answer is the same as far as SQ of the subs.  The amp SQ is different, though, and in general will sound better with higher impedence loading, although being able to HEAR that difference may be another story.

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Posted By: boardinbum
Date Posted: June 01, 2005 at 8:36 PM
I didn't think they made DVC Type E subs.




Posted By: Poormanq45
Date Posted: June 01, 2005 at 9:16 PM
AH, incorrect. THere IS a difference between 2 and 8 ohms.

A doubling of Ohms causes a halving of THD.

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Posted By: haemphyst
Date Posted: June 01, 2005 at 10:35 PM
dirty651 wrote:

i have two alpine type-e subs(4 ohms each). my amp operates 4-8 ohms. whats the sound difference from the subs in 2 ohm load compared to an 8 ohm load?


It also seems to me that NOBODY has re-read your post. (well, maybe ONE person did...) Your amp is not even stable at 2 ohms. Why are you looking to run it a 2 ohms, when it ain't able to do it? Run one woofer to one channel, and the other woofer to the other channel, you amp will see a load of 4 ohms - a perfectly safe operating condition. Leave the amp in stereo mode (or mixed mono, or summed mono, or something like that, just DON'T bridge it) and go.

If you INSIST on bridging the amp, you are stuck with NOTHING besides running them in series (4 + 4 = 8) then bridging the amp, for a net load of 4 ohms per channel. Sorry, man. There is the ONLY answer for you, until you get a better (more capable) amp.

boardinbum wrote:

I didn't think they made DVC Type E subs.


You are correct - I have been unable to find DVC type E's... Single voice coils only!

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Posted By: dirty651
Date Posted: June 02, 2005 at 2:01 AM

Poormanq45 wrote:

AH, incorrect. THere IS a difference between 2 and 8 ohms.

A doubling of Ohms causes a halving of THD.

So...the lower the load resistance the higher the power?





Posted By: Poormanq45
Date Posted: June 02, 2005 at 9:15 AM
TH ehigher the current draw, but the THD doubles for every halving of Ohms.

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