Old poster back with new question :)

kevinberry1 · Post by **kevinberry1** » Wed Jun 19, 2013 4:10 pm

Hey guys, I haven't been on this site in forever! Looks a little quiet now compared to when I used to post more. I am making some changes to my system and wondered if anyone was interested in offering some help/advice. I have been running a Oz Audio Matrix Elite 15 off my Arc Kar1000.2t that I got from Justin many years ago. I got a new vehicle (2012 Outback) and that 15 will be just too big. I'd like to get a decent single 8" or 10" sub and keep my amp because it has always treated me well.

I have a couple questions. I know it puts out 900 watts at 4 ohm mono, but I was wondering if it could be wired to 8 ohms and 450 watts with a dual 4 ohm sub wired in series? Anyone know whether that is possible? It would help me pick a much cheaper sub than one that can handle 700+ watts.

If it is possible to run the amp at 8 ohms, what sub would you suggest for a SQ type of install?

Thanks for any input!

Kevin

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Wed Jun 19, 2013 6:30 pm

Howdy Welcome Back!

Ya technically you could wire it up that way, I just have no idea how it would sound.
I think you would be much better off either finding another amp, with the amount of power you need for the sub you choose.

Or find a sub that matches the output of the amp.

kevinberry1 · Post by **kevinberry1** » Wed Jun 19, 2013 8:35 pm

Hey Chris, thanks for the welcome back. Do you think the sound quality would be bad? I hadn't considered that. I actually got a response email from Arc saying I could wire that way for approx 500 watts. I wouldn't mind selling my amp but doubt I would get anywhere near what it's worth and would probably end up spending more on a lesser amp, IDK.
Do you have a suggestion for a 10" sub that could handle about 900 watts and not break the bank? I can get a RE SE-X for $125 shipped but it is rated at 600 watts rms. I suppose I could run the amp at 4 ohms and tweak the levels so it wouldn't burn out the sub. Would that work?

Bwcad1 · Post by **Bwcad1** » Thu Jun 20, 2013 4:09 am

Wiring it the way you say would technically reduce THC at the higher load theoretically making it sound better. (Assuming you have super sq hearing lol) You would be just fine running it at 8 ohm.

Thu Jun 20, 2013 4:15 am

kevinberry1 wrote:Hey Chris, thanks for the welcome back. Do you think the sound quality would be bad? I hadn't considered that. I actually got a response email from Arc saying I could wire that way for approx 500 watts. I wouldn't mind selling my amp but doubt I would get anywhere near what it's worth and would probably end up spending more on a lesser amp, IDK.
Do you have a suggestion for a 10" sub that could handle about 900 watts and not break the bank? I can get a RE SE-X for $125 shipped but it is rated at 600 watts rms. I suppose I could run the amp at 4 ohms and tweak the levels so it wouldn't burn out the sub. Would that work?

If they say it would still put out that much power, then I think you would be fine using it that way.
I just wasn't sure on how much power you would actually get. Might as well give it a try! :)

kevinberry1 · Post by **kevinberry1** » Thu Jun 20, 2013 6:45 pm

Thanks for your input guys. Bill, good to see you're still on here!

Brad from Arc audio tech support said the sound quality would be just fine running the amp at 8 ohms but there would be an increased chance of clipping. I suppose I'd just have to adjust the gains. What do you guys think of running a 600 watt rms RE se-x sub with 900 watts and the gain and/or bass level turned down? Do you think I'd fry it? Those seem to be good subs but I'd hate to burn it up.

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JeremyC · Post by **JeremyC** » Fri Jun 21, 2013 5:43 am

As long as your smart with the volume knob, an the gain, there is no reason you can't have a few hundred watts extra power. A lot of the SQ guys on DIYMA run this way.

As for arc saying that running 8 ohms your more likely to clip, well they were talking about you and not the amp. Running at 8 ohms cuts your power, (as you knew) most people will crank the gain to try to get more output (creating clipping). As long as you know why you are wiring it that way, then you won't have a problem.

As for an 8 or a 10, I would do a single 12 in a sealed box. That way you can still keep it small, and still have enough cone area for a good low end response, and still keep decent output.

8s can sound good, but unless your running a few (or a huge box) most people aren't happy with it. A 10 can give you good output and low end, but your going to pay more. Or you can do one mid priced well designed 12 and be happy.

Bwcad1 · Post by **Bwcad1** » Fri Jun 21, 2013 5:44 am

Really depends on the enclosure when your talking power requirements and handling you have two things to consider Thermal/Mechanical. With a smaller box your mechanical limits go up but your thermal limits go down. IMO i think you would be fine but just make sure you dont over drive it. If you overdrive it you will know immediately lol. Remember music is dynamic and not constant especially with bass. So while you maybe running at 900 watts for a second over 5 seconds the majority will be significantly below that. The coil acts like a fuse it can take more than rated power for a certain length of time before you cause damage limiting that amount of time at higher than spec levels will keep you in the safe zone of that woofer.