I'm confused dual voice coil.

[TDot 10+ year member]

My issue is do I go with d2 or d4.

I'm using an alpine pdxv9 which does 500rms on the sub at both 2 and 4 ohms.

Everyone I speak to says ohms don't matter as far as performance and heat, just match the sub and amp. However I read this: Dual Voice Coil Subwoofers and it seems to say if I put a 2 ohm sub on a 4 ohm amp it will perform at a higher rms. so does that mean I can run a 2ohm 800rms on this amp and the amp pushes out 800rms for the sub with no issue?

Click to read more...

 

[basswiigee]

you confused me with that sh1t....

lol its simple if your amp does rated/ same rms at both ohm loads, then the rms doesn't change... therefore i'd wire to 4ohms as the amp is more efficent that way with less amp draw... therefore d2 series wiring (- to + on vc)... what you were looking at most amps do more rms at lower ohms but lose efficency but your is rated the same so you read all that for future knowledge that won't be used on this build as it doesn't apply....

 

[basswiigee]

but actually either sub would work as its the same wattage so you could go d4 and go down to 2ohm parallel wiring (+ to + and - to - on vc) the above version just takes some stress off amp...

 

[neo_styles 10+ year member]

Are you looking to add a second sub in the future? That's what you'll want to consider when you make a purchase. It's a lot harder to find big power at 2 ohms than it is 1, so a Dual 4 ohm sub might be the best option for you if you do plan to upgrade later. While I always advocated getting the most power at the HIGHEST ohm load you can afford, I understand not everyone else feels the same way. I would get the D4 since it allows you to add a second later.

 

[basswiigee]

Are you looking to add a second sub in the future? That's what you'll want to consider when you make a purchase. It's a lot harder to find big power at 2 ohms than it is 1, so a Dual 4 ohm sub might be the best option for you if you do plan to upgrade later. While I always advocated getting the most power at the HIGHEST ohm load you can afford, I understand not everyone else feels the same way. I would get the D4 since it allows you to add a second later.

asked myself that question but he's running a 5 ch now... so if he did add another sub he has to get another amp too... in which case i'd go d4 also cuz once you get that taste for bass... you'll change alot more than once...

 

[neo_styles 10+ year member]

asked myself that question but he's running a 5 ch now... so if he did add another sub he has to get another amp too... in which case i'd go d4 also cuz once you get that taste for bass... you'll change alot more than once...

My point is it's easier to buy a second D4 sub and a dedicated monoblock that does what he needs at 1 ohm than to have to replace both subs AND the amp. It's all about that future planning.

 

[TDot 10+ year member]

Thanks both of you. I went with the D2 for a two reasons. 1/ space is a bigger concern, so I definitely won't be getting a dual sub set up, and definitely won't be getting a second amp, 2/ the 4 ohm load will be easier on the amp so less strain and heat in my trunk, especially important since I'm running a computer and summers seem to be getting much hotter.