Svc woofer to 2 amplifiers ?

It's never recommended to run 1 sub, SVC or DVC, from 2 seperate amplifiers. You will rip the sub to piecesSquirrel

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  Well thats funny cause i have been running a typr r (alpine) 15 inch off 2 mrd300's for about a year and it still works fine.If what you are saying is true why do a high amount of spl oriented cars run multiple amplifier configurations to there sub's.... I think that you might be a little misinformed on this.. I would say that if you did not set the amps up correctly ,example gains etc you could do some serious damage. However runnin a dvc off a 2 channel amp running in stereo(very common) would be exactly the same as runnin a dvc or even svc off 2 amplifiers.  Someone correct me if they think this sounds wrong.Australia's Loudest Street Max 3-4 Car Ever!

Perhapse I should have expressed it differently. Yes it is possible (and safe) with the right equipment. But there isn't alot of that around. In your case, it was possible, but it is not a safe setup. Perhapse you would be interested in reading an article from JL Audio on the dangers of Independant Wiring 1) Even though many people use Independant Wiring, they are poorly informed before they attempt it. Usually their information comes from a salesman trying to make his money, and not caring about yours. 2) Just because it works, doesn't mean that it is safe for the equipment. How many people cause their amp to clip and not even realize just how damaging to the amp and sub it is? And I didn't say it wasn't possible, just not recommended. Now, there are configurations designed for using multiple amps and 1 sub. Kicker's KX series with amp strapping is a perfect example. In those configurations the amps are specifically designed to work together and the second amp's controls are completely bypassed (meaning both amps are controlled by the 1st amp's controls). So both amps work as 1 amplifier. Using amps that are not specifically designed to do this is not recommended. I believe the experts on this forum will agree with me on that one. Lets look at your current setup... Alpine MRD-M300 300 x 1 @ 2ohms based on a 14.4v electrical system 200 x 1 @ 2ohms based on a 12v electrical system Alpine SWR-1541D or SWR-1521D 2 or 4 ohm DVC 500 RMS 1500 Peak More than likely you the 2ohm version and are running each Voice Coil from a seperate amp. In that case you are getting the 200 x 1 rating from each amp, and only 400 watts total to the sub (unless of course you have upgraded your alternator and entire electrical system to a 14.4 volt system). Recommended operating wattage is 5oo watts minimum. Those subs can operate safely up to at least 800 - 1000 watts Hopefully you dont have the 4ohm version wired in parallel and bridged to each amp. I'm not going to even go any further with that one! I based the 2ohm assumption on the fact that the MRD-M300 does not have RCA pre-outs (the MRD-M500 does, but not the MRD-M300), so the only way you could have 1 sub using both amps is by sending a seperate signal to each amp, and then using those signals to the sub. Again, I must stress that even though running a DVC from 2 seperate amplifiers (or 1 voice coil to a seperate channel, or 1 SVC from multiple amps that aren't designed to do so) is possible, it is not recommended. If you're still interested in using 2 amps to run 1 SVC, then look into the documentation for the Kicker KX series, or others, that are designed to do it safely, properly, and wont damage your equipment. Squirrel

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No problem. I've seen a lot of manufacturers say that it is possible and list the benifits. But not many list the negative impact of independant wiring because it would keep people from buying their products. I can honestly say that the Alpine SWR-1521D Owners Manual is the first one that I have ever seen showing independant wiring as a viable wiring option. Maybe Alpine knows something that the rest of us don't! A lot of people in this forum have asked the same question about wiring a DVC to either 2 channels or 2 amps because they were told that they could do it "safely" or that "it wouldn't present a problem". Then after some research they find out what could, and usually does happen (you seem to be one of the few lucky ones!). You'll be hard pressed to find an "expert" on this site that will suggest independant wiring as anything other then an absolute "last resort" wiring method. The MRD500's are 400 x 1 @ 2ohms on a 12v electrical system, so you're running good on total RMS (a lot better then the M300's!) Here's a link to the Kicker KX series amps, as well as the KX series Manual and KX series Tech Sheet. They have information on amp strapping the KX series, as well as using 1 bass control for both amps. Good luck, and let us know how it turns out or if you have any other questionsSquirrel

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No problem. I've made my share too! I work 12 hour days from 2am - 2pm so I know what you mean! I've read some good reviews on DD9915's, but have not heard them personally. From what I've read they are mainly an SPL sub, but have good SQ as well. If I got the specs right, the DD9915's are 1500RMS/3000Peak, and are available in either DVC or QVC (Quad Voice Coil). That's a lot of amperage needed, at least 3000 total RMS. There are multiple amps out there capable of doing that, but they will cost you $'s! Here's a link to the Digital Designs DD9900 Series web page.Squirrel

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