[reaper7534]

My amp currently does 900 watts at 2 ohms and 1300 at 1 ohm. I will be running a Alpine DVC 4 Ohm 12 ", wired in parallel for 2 ohms.

Assuming 100 % efficiency from the amp ( that's not going to happen ), would I be better served running 1 sub around 700 rms ( didn't plan to max it out, trying to get some life out of it ) or two subs around 450 each ?

These will start out in a sealed box since my space is at a premium. I guess I could wire two down to 1 ohm also... decisions.

Thanks guys....

 

[Beckerson1]

Well a couple advantages would be decreased distortion at the same output level (SPL), increased cone area, and power handling (being two subs now over one). I mean its something that if you are willing to lose some more space in the trunk and can afford the extra driver go ahead and do it.

Up to you really

 

[squeak9798]

Double the cone area with the same power, gain 3db.
Double cone area and power (I.e. Double displacement), gain 6db.

So yes, there is the advantage in output. There is also a distortion advantage as with 2 subs you will have less excursion for a given output level which translates into less distortion for a given output. Will the distortion be different enough to be audible? Depends on many factors. The downside to running 2 subs instead of 1 is it's more expensive and takes up twice as much space.

It comes down to your budget, goals, and available space. There are advantages and disadvantages either way. You have to decide what best fits your particular situation best.

 

[reaper7534]

Thanks for the info. The trunk space issue " shouldn't really affect me " since I generally know when I will need it and just remove the subs. If running two lowers distortion, that would be a big selling point for me.

 

[Sine Swept]

There is no replacement for displacement. One sub does not do what the identical twins can cause, a panic at the disco!

I ran one JBL P1222 on 400 watts, then doubled the cone area with another and gave each 600 watts. It was a **** eating grin worth of difference (but only really like 4-5dbs). I have sat in cars with more power and to be honest it scares me a little as I prefer to be the one with the volume control.

 

[reaper7534]

There is no replacement for displacement. One sub does not do what the identical twins can cause, a panic at the disco!

I ran one JBL P1222 on 400 watts, then doubled the cone area with another and gave each 600 watts. It was a **** eating grin worth of difference (but only really like 4-5dbs). I have sat in cars with more power and to be honest it scares me a little as I prefer to be the one with the volume control.

If I go two and feed them around 600 watts each @ 1 ohm and 100 watts x 4 each to my door speakers, do you think my stock electrical can handle it ?

I can't get a firm number on the alternator output, but seems to be around 100 amps output. Of course these numbers are full tilt.

I plan on changing the battery to a XS D5100R

I don't listen to it blaring loud by any means, but when the mood strikes me I'd like it to be there.

 

[Sine Swept]

With a decent battery, Big 3 wiring and 1/0 power and ground you should be good to go.

Putting in a remote bass controller would also be an asset, on the fly sub volume without digging into menus on a head unit as some can be buried deep.

With gains set properly you should be able to get very loud before the voltage drop is too much.

 

[reaper7534]

With a decent battery, Big 3 wiring and 1/0 power and ground you should be good to go.

Putting in a remote bass controller would also be an asset, on the fly sub volume without digging into menus on a head unit as some can be buried deep.

With gains set properly you should be able to get very loud before the voltage drop is too much.

Should have mentions I'm doing the big 3 when I run the main wire. The amp has a remote bass controller, just need to run it.

Will be setting the gains with a o-scope.

Thanks for the help guys...

 

[Sine Swept]

I have heard it is okay to use up to a -10db tone when setting with a scope (for setting the sub channel). I tried setting with a 0db tone and needed more distortion as it was much too clean for my liking.