Dual 2ohm or dual 4ohm

[army5 10+ year member]

Hello all. I've been removed from car audio since my high school days and need some opinions on selecting a sub. Below are the specs of my mono amp.

- 500 Watts x 1, at 4 ohms

- 1000 Watts x 1, at 2 ohms

- 1200 Watts x 1, at 1 ohms

The sub I'm looking at is a 12" 1000RMS/3000Peak with a dual 2ohm voice coil or dual 4ohm voice coil.

I only want one sub to go in my SUV. I have no intention on adding others as I have a family now and room is just as important. In high school I built my own box so I intend on doing the same. Looking at around .88 -1.0 cu. ft sealed as specified by the sub manufacture.

So, what sub would you buy (2ohm or 4ohm) and how would you wire it? The man in me says by dual 2ohm and wire it for 1ohm and pull every last watt out of the amp. But those extra 200 watts may shorten the life of my amp/sub. Don't want that.

Lastly, do I need a cap with this size amp and if so what size?

Responses are greatly appreciated. Not looking to win any SPL awards, just want to add a nice kick with a clean and simple install.

Jeff

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[blazeplacid 10+ year member]

dual 2 ohm

a set of pos and neg wire ran to each voice coil will give you 1 ohm and the ~1200 watts from your amp

 

[Call_it_done 10+ year member]

Hello all. I've been removed from car audio since my high school days and need some opinions on selecting a sub. Below are the specs of my mono amp.
- 500 Watts x 1, at 4 ohms

- 1000 Watts x 1, at 2 ohms

- 1200 Watts x 1, at 1 ohms

The sub I'm looking at is a 12" 1000RMS/3000Peak with a dual 2ohm voice coil or dual 4ohm voice coil.

I only want one sub to go in my SUV. I have no intention on adding others as I have a family now and room is just as important. In high school I built my own box so I intend on doing the same. Looking at around .88 -1.0 cu. ft sealed as specified by the sub manufacture.

So, what sub would you buy (2ohm or 4ohm) and how would you wire it? The man in me says by dual 2ohm and wire it for 1ohm and pull every last watt out of the amp. But those extra 200 watts may shorten the life of my amp/sub. Don't want that.

Lastly, do I need a cap with this size amp and if so what size?

Responses are greatly appreciated. Not looking to win any SPL awards, just want to add a nice kick with a clean and simple install.

Jeff

Hey Jeff, for only 200 watts more, no need to wire down to 1ohm. 2 will be fine and just wire the dual 4ohms down to 2. If you have an SUV, you should be fine on power, no need for a cap either, just my 2 cents and I'm not genius...so we'll see what others have to say.

 

[ultimate157 5,000+ posts]

Get the Dual 4.

You will not notice a difference between 1kw and 1.2kw. Your amplifier is going to be more efficient at 2 ohms.

Also, peak ratings are a manufactured number used for marketing.

 

[army5 10+ year member]

I should have stated that the power ratings for the amp are RMS. The specs state 2400 peak but I don't see at what impedance (1ohm maybe?).

Appreciate the responses.

Jeff

 

[ultimate157 5,000+ posts]

I should have stated that the power ratings for the amp are RMS. The specs state 2400 peak but I don't see at what impedance (1ohm maybe?).
Appreciate the responses.

Jeff

Yea I knew those were RMS... just commenting on the sub choice ratings. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Haunz 10+ year member]

Dual 2

I don't see how there will any difference in efficiency.... and having extra headroom is always better...

 

[nauc 10+ year member]

which exact sub and amp is it

 

[TurdFergueson2 5,000+ posts]

Do what they said and no you don't need a cap. look into an upgraded front battery, getting a rear battery, and do the Big 3 upgrade.

 

[army5 10+ year member]

The sub is a Pioneer Premier TS-W3001D2|D4.

Amplifier is a Pioneer Premier PRS-D1200SPL.

Jeff

 

[nauc 10+ year member]

The sub is a Pioneer Premier TS-W3001D2|D4.
Amplifier is a Pioneer Premier PRS-D1200SPL.

Jeff

get the Q12, dual 2 ohm

better sound quality and more output and has a qtc of .701 in .78ft3

http://www.ficaraudio.com

graph, the red line is the Q12...

http://img297.imageshack.us/img297/4773/capturekq7.jpg

 

[jrwalte 10+ year member]

I'd get dual 2 ohm and go to 1 ohm. And at the same DB volume as if it the amp were running at 2 ohm, wouldn't the amp be more efficient at 1 ohm? It needs less amperage to generate the same wattage, no?

 

[ultimate157 5,000+ posts]

I'd get dual 2 ohm and go to 1 ohm. And at the same DB volume as if it the amp were running at 2 ohm, wouldn't the amp be more efficient at 1 ohm? It needs less amperage to generate the same wattage, no?

Opposite. Higher the resistance the less current.

 

[Adrianos 10+ year member]

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