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Glasswolf!

 

Bronze Member
Username: Rzarector

Coquitlam, Bc Canada

Post Number: 27
Registered: Dec-04
ok ive posted about my stuff so many times.. sory im just not sure which is the best option and i dont wanna buy the wrong amps..
so in a proffessional opinion which is the better option the subs are two alpine 2ohm dvc 12" R's-300 watts rms each, and one 15" 4ohm dvc Type R -500watts Rms WHICH is the better option .. buying 2 MRD M501's that supply 550x watts each at 14.4 volts or 1 MRD M1001 that gives 1000 Watts at 14.4 volts and one MRD M501
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 6429
Registered: Dec-03
well here's the problem:
your subs are dual 2 ohm coil models
that means if you wire the coils in parallel you get two 1 ohm subs.
those in series yield a 2 ohm load.
that'll work on the MRD1001
The MRD501s are rated for 550 watts @ 2 ohms, which you can't get from a single sub with dual 2 ohm coils.

the MRD1001 is a better option anyway though. easier to mount and wire one amp instead of two.

 

Bronze Member
Username: Help_2

MN

Post Number: 20
Registered: Dec-04
Youre not hooking up 2 different size subs
in the same car...are you...
 

Bronze Member
Username: James1115

Ct

Post Number: 18
Registered: Dec-04
hooking up two different size subs in the same car is fine! If they are the same impedence. Lets say 1-12 that is a dual 4ohm and 1-15 that is a dual 4ohm is fine you would run them at 4ohms or 2ohms no big deal. The problem lies in your impedence set-up with your voice Coils. You can not run two different Voice coil impedence ratings off the same amp you will fry your components. Always run the same ohm speakers off the same amp never mix it is set-up for disaster.
James
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 6465
Registered: Dec-03
wait wait.
I'm pretty sure I know this guy's setup.
he's got one amp dedicated to the fifteen.
he's looking at if he should put one amp on each twelve too, or use one amp for both twelves.
there's really no drawback to what he's planning if he's trying to squeeze all the SPL he can out of three subs he's already got.
If I were doing it, that's how I would set it up too.
one amp for the 12" pair and another amp for the 15"
no conflicts that way as long as he has the current the amps will need.
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 6465
Registered: Dec-03
wait wait.
I'm pretty sure I know this guy's setup.
he's got one amp dedicated to the fifteen.
he's looking at if he should put one amp on each twelve too, or use one amp for both twelves.
there's really no drawback to what he's planning if he's trying to squeeze all the SPL he can out of three subs he's already got.
If I were doing it, that's how I would set it up too.
one amp for the 12" pair and another amp for the 15"
no conflicts that way as long as he has the current the amps will need.
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 6466
Registered: Dec-03
addendum, he's using a separate enclosure (air space) for the fifteen as well.
 

Bronze Member
Username: Rzarector

Coquitlam, Bc Canada

Post Number: 29
Registered: Dec-04
yes glasswolf there all in diff chambers in a fibreglass box..
but which of the 2 amps would you run to power the 12's and which to power the 15"
its not like im gonna cram them with all the wattage they can take cause im not competing or anything i just thought a bigger amp would make it easier on things?
 

Bronze Member
Username: James1115

Ct

Post Number: 19
Registered: Dec-04
ohhh I misunderstood! sorry man.
James
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 6478
Registered: Dec-03
use the MRD501 for the fifteen.
use the MRD1001 for the two twelves.
 

david rogers
Unregistered guest
mrd-m1001 to the 2 12"s but would it be ok in a different scenario to run 2 mrd-m501's to 2 12" dual 4ohm type r's?..i know i read a similar question elsewhere but if you could just give me an answer that would be awesome thanks.
 

Bronze Member
Username: Help_2

MN

Post Number: 22
Registered: Dec-04
might be overpowering them a little..

but itll work
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 6495
Registered: Dec-03
same result.
about 500-550 watts to each sub either way as long as the load is correct.
 

Gold Member
Username: Jonathan_f

GA USA

Post Number: 2746
Registered: May-04
"You can not run two different Voice coil impedence ratings off the same amp you will fry your components. Always run the same ohm speakers off the same amp never mix it is set-up for disaster."
Actually, that won't hurt a thing. If you were to hook a 4 ohm speaker and an 8 ohm speaker in parallel to the same amp (assume a mono amp), then it would present a 2.66 ohm load to the amp. Assuming the amp is 2 ohm stable, the amp will be fine, and the power will divide accordingly to each voice coil of the subwoofer. Nothing is harmed at all.
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 6527
Registered: Dec-03
what you really don't want to do, is put different amounts of power to each coil of a DVC sub.
now that will indeed kill a speaker in short order.
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