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Thread: Isac or anyone amp help |
    
Bronze Member Username: Rzarector
Coquitlam,
Bc
Canada
Post Number: 17
Registered: Dec-04
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| Posted on Friday, December 10, 2004 - 08:47 pm: |
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whoa i was always under the empression that mono amps devided the power between 2 subs..
so im ready do buy my amps for my 2 type R 12's 2ohm
and 15" type R 4ohm.. so rather than get alpines MRD-M1001 which has 1000watts rms .. i should get the MRD-M501 which has 550 rms2ohm giving 300 to each 12 easily and get another one for the 15 does this sound right? |
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Silver Member Username: Carguy
Post Number: 811
Registered: Nov-04
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| Posted on Friday, December 10, 2004 - 11:22 pm: |
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Hey MarkS, yes the amp will divide power between 2 subs. I found my old mathematical formula. See what happens when you pile your books away for a long time 
That sounds about right. Since your 15" sub isn't the same as the 12's, you'll need a separate amp.
Just curious, why are you getting 3 subs?
Why not just 3 or 4 identical ones? |
Bronze Member Username: Rzarector
Coquitlam,
Bc
Canada
Post Number: 19
Registered: Dec-04
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| Posted on Saturday, December 11, 2004 - 03:59 am: |
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just prefference i guess the 15 type R has more excursion/power handling and obviously far larger magnet so just wanted to try somethin diff hoping it will pickup the deep base nicely |
Gold Member Username: Glasswolf
NorthWest,
Michigan
USA
Post Number: 6230
Registered: Dec-03
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| Posted on Saturday, December 11, 2004 - 11:50 am: |
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the amplifier will divide it's power ***at the given load*** between the two subs connected to it, for a monoblock amp. yes.
remember, two subs in parallel halves the load, which, unless it's an amp with a regulated output like the JL slash series, will double the power output of the amplifier..
If you connect two 4 ohm subs to an amp in parallel, it sees a 2 ohm load, thus doubling the amp's power (theoretically, or approximately) from what it puts out at a 4 ohm load.
Therefore, with a mono amp, if you put a single 4 ohm sub on the amp, it may see 500 watts.
If you put a second 4 ohm sub on the same channel in parallel, each sub will then see 500 watts.
get it?
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Bronze Member Username: Rzarector
Coquitlam,
Bc
Canada
Post Number: 21
Registered: Dec-04
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| Posted on Saturday, December 11, 2004 - 09:24 pm: |
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sorta do you mean it like this.. the MRD M501 is Rated at 225 rms at 4 ohms and 550 at 2 ohms
so are u saying adding another sub brings it from 225 to 550 doubling the power? i still dont see how both subs recieve 500 :\ |
Gold Member Username: Glasswolf
NorthWest,
Michigan
USA
Post Number: 6307
Registered: Dec-03
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| Posted on Saturday, December 11, 2004 - 09:55 pm: |
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if you have a single sub connected to the MRD501 and the sub is 4 ohms, it'll get 225 watts.
If you add a second 4 ohm sub in parallel to the MRD501, you'll get 250 watts to each sub.
(500 / 2)
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