4ohm.

[tat2 10+ year member]

could i wire 2 4ohm dvc subs like this to get 4ohm to a mono amp.

put each sub in parallel to 2ohm then put them in series together to make it 4ohm

then just run it to my mono amp.

i know i can put them in series then parallel to get 4ohm but i reall don't feel like pull my box out of my trunk to redo it.

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[davidfre21 5,000+ posts]

so both subs are DVC 2ohm? i got kinda confused... well is so im pretty sure u cant, u can get .5, 2 and 8ohm loads. but dont get me wrong wouldnt a mono amp work better @2ohms?

 

[tat2 10+ year member]

my bad there 4ohm dvc.

 

[helotaxi 5,000+ posts]

You really want to run the subs in parallel to each other if at all possible.

 

[tat2 10+ year member]

here's what i got i have 2 12 L5's dual 4ohm i just got i pg t1200.1, i had them in series then paralleled to the amp, but i pulled them out and was going to just run one sub and make a new box for the other one,

so i had to parallel the one sub to have it at 2ohm for the amp, but now i want to put the other sub back in and run them both, but i really don't want to have to rewire the other sub again.

so i figured if i can just parallel both subs then put them in series to the amp i'd just do that to save time.

thanks for the help guys.

 

[tat2 10+ year member]

dam helotaxi got some power there don't ya.

 

[theimpaler 10+ year member]

ohms law:

in series, final resistance is sum of the resistances. ie. X+Y=Z

in parallel, final resistance follows the formula (1/X) + (1/Y) = (1/Z)

if you have a 2 dual 4 ohm subs your possible final resistances (as seen by a mono amp) could be 1, 1.6, 4, 10, or 16.

you wanted 4 ohms and you could get this 2 ways:

wiring each individual sub in parallel and then the 2 subs in series or

wiring each individual sub in series and then the 2 subs in parallel

 

[tat2 10+ year member]

ohms law:
you wanted 4 ohms and you could get this 2 ways:

wiring each individual sub in parallel and then the 2 subs in series or

wiring each individual sub in series and then the 2 subs in parallel

cool i wasn't sure if it was o.k. to wire them this way most sites don't list it.

"wiring each individual sub in parallel and then the 2 subs in series"

thanks that save me some rewiring work and the pain of pullin gout my box.

thanks for the help.

 

[helotaxi 5,000+ posts]

It will work and will give you the load you are looking for but, and there's almost always a "but" isn't there, the two subs will interact electrically if they are wired in series. The coil of each sub, moving in the gap will generate EMF (current) that must go somewhere. If there is only one sub it goes to the amp (and is part of the difference between Re and impedance). If the subs are in parallel, is goes to the amp as that is the path of least resistance. If the subs are in series, it must pass through the other sub to get to the amp to complete the circuit. That effectively equates to each sub getting a different signal and gives the resulting cancellation and muddy bass.

 

[helotaxi 5,000+ posts]

dam helotaxi got some power there don't ya.

Yes, yes I do //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[maylar 10+ year member]

It will work and will give you the load you are looking for but, and there's almost always a "but" isn't there, the two subs will interact electrically if they are wired in series....

Current in a series circuit is the same for all components. Both subs receive the same current. Both subs move the same amount and generate the same back EMF. They don't interfere with each other.

My preference is to wire each voice coil in series (8 ohm total) and then parallel the two speakers. It just "feels right" somehow. But electrically it makes no difference.

 

[helotaxi 5,000+ posts]

Thanks for the correction. I have read basically what posted in several places before though. Audio myth?

Adire even says to wire them in parallel for the reason I stated above. I'm not doubting you, you are one of the people I would believe above most others on these subjects, but where is the conflicting info coming from?

 

[tat2 10+ year member]

well i'm going to put them back to series to parrallel any ways. i just found out that my box has a few small air leaks in it, so i have to pull it out any ways to fix that problem.

thanks for all the help.

 

[helotaxi 5,000+ posts]

Gerald, connecting two speakers in parallel is an old trick to smooth out speaker response and enhance the damping of either speaker. HIFI designers took it one step further by connecting two speakers of different sizes in parallel. A speaker has a large impedance increase at its fundamental resonance, and depending on the installation, this can cause the speaker to sound boomy or out of control. By connecting two speakers in parallel, particularly two speakers of different sizes with different resonant frequencies, each speaker will tend to quench or dampen the boominess of the other. Since no two speakers are exactly alike, even two of the same size, that damping will occur, however slight, for any speakers connected in parallel. For speakers connected in series, there appears to be less control, and more of what is called 'back EMF' from the speakers fed back into the output circuit. While that seems rather chaotic, many players prefer the series connection, as it gives them a more textured tone, enhanced breakup, and overall a more desireable tone for guitar work. It's totally subjective, of course, and many factors affect the end result, such as voice coil size, gap energy, closed back/open back, output circuit damping, etc. The best thing to do, in my opinion, is try both arrangements since you have the luxury of impedance tap selection, and go with the configuration you like the best.

I found this on another website in a "Q&A" section.

 

[helotaxi 5,000+ posts]

http://www.jlaudio.com/tutorials/dvc/point.html

From JL Audio.