Hey,

Just need a bit of help with planning my Sub setup.

I'll start with the equipment I'm running first. Amp is an Audiobahn A8000T which runs at 800x1 @ 2 ohms or 400x1 @ 4 ohms. It's not 1 ohm stable. This will be running off high level speaker inputs aswell. Not ideal, I know, but it's what I have for the time being. Good thing is it takes them directly, so no need for a high-low adapter. The sub I'm running as a Dub mag audio DUB200 12" by Audiobahn. It's dual 4 ohm voice coil, 400 rms.

Now, so far the problem I have is that the dual 4 ohm voice coils can be wired to have either a 2 or 8 ohm impedence. Running at 2 ohm, the amp will be putting 800 rms into a speaker that is designed to run at 400 rms, which is not a good idea. So I need to find a way to wire it to have 4 ohms. Unfortunately, with the single sub, I don't think that's possible (correct me if I'm wrong though).

Solution I've come up with is to run another sub off of the amp. If I add a second DUB200 in the system, wired like so:

http://C:\WINDOWS\Desktop\Daniel's Folder\Cars

I come up with a total load on the amp of 4 ohms (again, correct me if I'm wrong) which then should be running 400 rms through the system.

Now, my question here is, the 400 rms from the amp, does that mean each sub will be running at 400 rms? Or is that split between the two, so each will be running at 200 rms. If this is the case, is there any way to wire the two of them with a 2 ohm load all up to give the system 800 rms all up to split between the two of them at 400 rms. Lastly, by running two subs off of the single class D amp, is that pushing it a bit? Will the amp be able to handle it, especially keeping in mind it will only be running off of high level inputs.

Any help here would be greatly appreciated.
Cheers,
Daniel

Is this a MonoBlock..?

As far as I know it is.. Which means.. running one sub would probably be all you could do.. I think.. :nuts:

You'll just have to run 800rms through the sl*t and watch her blow.. or I can :gtfo:

SuFz :rant:

Yeah mate, ure amp is rated 800W @ 2Ohm, so load her up with another sub. All you have to do is attach both sets of wires to the output of the amp and it will give you a parallel connexion. Amp should be fine to run like that off the Hi-level input too, can't see any reason why it wouldn't. Good luck with it bro.

800 w rms is fine into ur sub that is rated at 400 w rms. The amp doesnt always put out it rated power. Just turn the gains down. Set the gains properly so that it doesnt clip at full volume and you'll be fine.

Underpowering a sub and pushing an amp to clipping will do more damage than slightly overpowering a sub. Headroom is the best thing in car audio as it means your equipment isn't under strain.

If the amp is stable at 2 ohm, and you are running two dual 4 ohm subs, you wont be able to load it down to 2 ohm anyway. Which means you wont be making the best use out of your subs.

The only way to get the most power out of your amp is to run with one dual 4 ohm sub @ 2 ohms. (as you are doing)

Or upgrade to 2 x dual 2 ohm subs, or 2 x single 4 ohm subs. (both which allow total 2 ohm configs)

If you wanted to use all of this power upgrade through one sub, upgrade to a single better subt hat can handle 800 w rms.

But firstly see when the sub actually starts clipping. Is the sub loud enough now?

To set gains, turn the gains to 0, turn the headunit to max (before it starts clipping itself) slowly increase the gains until the sub begins to clip, dial it back to a safe level.

If you take care of your gear, you wont have any problems.

Peace

Tim

My vote is to use the one sub and keep your gains down.

Sorry, pic didn't work, here's the sub wiring diagram again:

http://www.aussiemagna.com/forums/attachment.php?attachmentid=18949&stc=1

Anyway, none of it is installed yet, all still at drawing board stage, so I'm not sure if it is loud enough yet.

OK, so running the one sub with the gains down should be fine...

Main question though, if I do have the two subs wired up at 4 Ohms (400w rms x1) will that mean that that total power will be split between tho two subs, each getting 200w rms, or will each be getting 400w rms?

Because as far as I understand, if each will be at 400w rms then each sub should be as loud as the single sub running at 800w rms with the gains turned down low, in which case it will sitll be running at about 400w rms as that's about the most it should be able to handle.

Main question though, if I do have the two subs wired up at 4 Ohms (400w rms x1) will that mean that that total power will be split between tho two subs, each getting 200w rms, or will each be getting 400w rms?.
total power is split b/w the two subs so each sub would recieve 200 w rms.

If you have two dual 4 ohm subs and you want the total load to be 4 ohm. Wire each sub in series by connecting the +'ve of one voice coil to the -'ve of the other voice coil. This creates a 8 ohm load for each sub. Then wire the two 8 ohm loads in parallel to present a 4 ohm total load to the amp.

On that note you can do the opposite and wire each subs voice coils in parrallel to create a 2 ohm load per sub, then wire each 2 ohm load in series to present a total 4 ohm load to the amp.

Either way will sound the same.

Peace

Tim

Hmm, I'm looking at what my options are. If I were to run two of these subs, my best option would have been to try and get the Audiobahn A8002T, which runs 200x2 at 4 Ohms and 400x2 at 2 Ohms, which would have been ideal. Other option is as you said Tim, upgrade to a better single sub. I can see a Audiobahn Eternal series AWES12P on eBay at the moment, which runs at 1100w rms and is dual 4 Ohm, so that would be making the most of the amp. ANd then again the other option is to buy two brand new single 4 Ohm subs that run at about 400w rms.

Seems to me, the best option might be the Eternal series sub, I'll have to keep an eye on it and see how much it goes for... Hopefully I can get it as cheap as it is going for now.