I'm new to these forums and have a simple question (I hope it's simple). Can 2 Alpine MRD-M500 be hooked up to one Alpine SWR-1241D in this manner? Hook one amp up parallel to the sub to give the amp a 2ohm load, then parallel a second amp the same way, to combine the 2 amps to produce 1120Watts at the sub, and 2ohms to each amp?
Posts: 12 | From: Canada | Registered: Apr 2006
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You should be able to run one amp per coil but if your amps settings are even slightly off it could fry your sub. Unless the amps are strapable (which I dont think they are) dont hook them together or bad things can happen.
Posts: 1025 | From: Ohio | Registered: Sep 2005
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I have this combo b/c i do have 2 of the Alpine Type R 12 inch subs, and 2 of the MRD-M500 amps, but i wanted to see if the one sub with double the input would raise my dB at all, and to make a little more space in the trunk of my car so that the sound could flow more freely into the car. But it's not a big problem that it won't work, i'm hitting 148dB now and i just wanted to experiment. Thanks for the info guys.
Posts: 12 | From: Canada | Registered: Apr 2006
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damn 148 with 1000w and 12s and in trunk is crazy.is that with the termlab on windshield... pics please
Posts: 495 | From: harlan ,iowa | Registered: Jan 2006
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That's with the older mic i think maybe Audio Controls?? not sure, the brand but if it is termlab, then it wasn't the newer one that just looks like a little box, the thing actually looks like a mic. As for pictures, i don't know how to put themon here? sorry
Posts: 12 | From: Canada | Registered: Apr 2006
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As i said both of my amps are Alpine MRD-M500, running Alpine 12inch type R dual 4ohm voice coils. do you think i'd get more output using one sub with both amps loaded to 4ohms, or more output with 2 subs with the amps loaded to 2ohms?
Posts: 12 | From: Canada | Registered: Apr 2006
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quote:Originally posted by mr_malina: You should be able to run one amp per coil but if your amps settings are even slightly off it could fry your sub. Unless the amps are strapable (which I dont think they are) dont hook them together or bad things can happen.
Wrong sir
As long as both amps are fed the same signal (and arent out of phase with each other) you will be just fine. Even if one amp is putting out more power than another they will be just fine. The only clincher is that both amps must be playing the same frequencies at the same time.
-------------------- 2005 Florida Street C Champion 2004 SBN Street C Champion 2004 SBN IDBL No Wall Champion 2003 NOPI Nats Street B Champion
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Thanks Yoda, I did not know that. My big concern was if the crossovers were a little off that each coil would be trying to play something different.
Posts: 1025 | From: Ohio | Registered: Sep 2005
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well the cool thing about that system is if you take a pair of y splitters and split the left channel to both left sides of the 2 amp's inputs and did the same with the right feed both amps will be fed the same signal at the same time.
And let's say that one crossover is set to 100hz LPF and the other at 80hz LPF, both amps would still be playing 100hz at the same if the LPFs werent on. So the LPF filter on the one amp is just reducing the amount of signal being put into one of the coils. What little signal is being put into the coil is still perfectly additive to what the other amp is doing, it's just not as much signal.
Sure this can affect the sound and reduce spl, but there wouldn't be any physical damage to the woofer.
Now if you were to put the left channel into one amp and the right channel into another amp while both powering the same sub, you'd have some issues.
-------------------- 2005 Florida Street C Champion 2004 SBN Street C Champion 2004 SBN IDBL No Wall Champion 2003 NOPI Nats Street B Champion
quote:Originally posted by Bumpin' Yota: Now if you were to put the left channel into one amp and the right channel into another amp while both powering the same sub, you'd have some issues.
Why is that? I tend to feel the opposite way. A DVC speaker will play the sum of it's inputs.
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So from what "300watts" says and through the link he posted i gather that i can connect both my amps to the one sub. This i b/c i want to keep a 2ohm load on the amps. Since they are all digital then i can set them both for the exact same settings. Once again what i'd like to do is run both amps to both voice coils. basically like what you would do if you ran 1 amp to get the 2 ohm load on the amp, but then add one more amp in the exact same wiring configuration to double the input into the sub. My reasoning for wanting to do this is i think 1 sub running 1160Watts will produce greater dB's then 2 subs running 580watts a piece.
By the way thanks for all the help guys, keep the info coming it great. Right now i'm at 148dB and i only want to get louder.
Posts: 12 | From: Canada | Registered: Apr 2006
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quote:Originally posted by TeamSubGoPoof: you would be running the sub out of phase with itself
I agree that a DVC woofer's output will be seriously diminished when it receives signals that are out of phase. However it will not necessarily damage the woofer.
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Yea but how would my voice coils be out of phase? both amps will be wired the same way to the sub, so they won't be able to be out of phase unless my amp was set wrong in which case i could change the setting since it is digital. As someone posted above i feel it would work the same way as bridging a 2 channel amp, but instead using 2 amps. 2 amps equals double the input to the sub?
Posts: 12 | From: Canada | Registered: Apr 2006
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Bassmaz: you should be cool unless you are exceeding the sub's power handling capabilities. I'd put one amp on each coil and call it a day. -chris
Posts: 144 | From: Midwest | Registered: Oct 2003
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quote:Originally posted by Bumpin' Yota: Now if you were to put the left channel into one amp and the right channel into another amp while both powering the same sub, you'd have some issues.
Why is that? I tend to feel the opposite way. A DVC speaker will play the sum of it's inputs.
Yes a DVC speaker will play the sum of its inputs, however you do not want one coil fighting the other which is what would happen if you were to operate your amp in stereo instead of mono and didnt properly split left and right channels as I suggested. Yes you will get output but one coil will not be attempting to play the same frequencies at the same time as the other coil. Hence the whole left right channel separation...
-------------------- 2005 Florida Street C Champion 2004 SBN Street C Champion 2004 SBN IDBL No Wall Champion 2003 NOPI Nats Street B Champion
I'm new to these forums and have a simple question (I hope it's simple). Can 2 Alpine MRD-M500 be hooked up to one Alpine SWR-1241D in this manner? Hook one amp up parallel to the sub to give the amp a 2ohm load, then parallel a second amp the same way, to combine the 2 amps to produce 1120Watts at the sub, and 2ohms to each amp?
I looked up your stuff at alpine. Your subs are dual 4s, with a power handling capability of 300watts each. Those amps will produce 200w rms @ 4ohms or 400w rms @ 2ohms.
What you proposed doing in the quote is NOT recommended. First you will be severely overpowering the sub, second each amp would see 1ohm not 2 if you were to parallel the amps into the paralleled set of coils. Doing this will send your amps into protect in no time for daily driveing.
Your subs have 2 separate coils that are 4ohm a pop. One MRD M500 would be perfect for that sub, just parallel the coils on the sub, wire it up and call it a day.
quote:Originally posted by bassmaz: I have this combo b/c i do have 2 of the Alpine Type R 12 inch subs, and 2 of the MRD-M500 amps, but i wanted to see if the one sub with double the input would raise my dB at all, and to make a little more space in the trunk of my car so that the sound could flow more freely into the car. But it's not a big problem that it won't work, i'm hitting 148dB now and i just wanted to experiment. Thanks for the info guys.
First off SPL, amongst many other things, is cone area and power dependant. You'd loose 3dB if you could do what you proposed doing and would likely overpower the sub so much so that it would likely blow. With 2 amps and 2 sub, you are juuust fine.
Last question, how do you know you are at 148 with 800watts rms... What meter were you on? And real men do it on the dash, windows up and car sealed!
-------------------- 2005 Florida Street C Champion 2004 SBN Street C Champion 2004 SBN IDBL No Wall Champion 2003 NOPI Nats Street B Champion
posted
I got 148dB out of my system which is 2 Alpine type R 12" subs, with 2 Alpine MRD-M500 Amps powering them. Each amp is connected to one sub and the amps are loaded to 2ohms. I constructed a custom box with interchangable ports, to go in the trunk of my 93 Ford Tempo, and they are rear facing. The 148dB was hit at a sound competition i attended this summer, and yes all the windows and doors were closed, and the mic was placed on the passenger side window, and was positioned based on the jig everyone uses. The mic was either an older model term-lab or an audio control's mic. The sub box port was tuned to 32hZ. And both those amps are rated for 565Watts a piece from Alpine on their "birth certificates" and that's at 2ohms, and 14.4V, which i am running them at.
Posts: 12 | From: Canada | Registered: Apr 2006
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