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Type R wiring?

Old 09-08-2007, 11:49 AM
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Type R wiring?

I have 3-10"type r's (dual 3ohm) and I'm going to run them off of 2 MRP-M450's. So my question is should I run them @ .75 to each amp, one amp running each set of coils, or get a third amp, or chang the wiring to a more amp friendly load. I know it sounds like alot of load but I have seen these amps run @ .25 without much trouble. Its just my dd but I do like to go loud. I reaaly only have room for three amps, and I wanted one (MRP-F450) for the components.

Also are the newer dual 4 ohm type r's better then the originals. They're brand new either way.
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Old 09-08-2007, 12:30 PM
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you could wire the 3 subs to 2 ohms. if the amp isnt stable at 1 ohm i really dont think it will handle it at 0.75 ohms.

Wire each sub voice-coils in series, then wire all 3 subs in parallel to get 2 ohms.
(my math should be correct lol)
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Old 09-08-2007, 03:10 PM
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To the best of my knowledge, there were never 3 ohm coils on Alpine Type R subs.

Dual 2 or dual 4.
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Old 09-08-2007, 08:38 PM
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I'm not sure how to get 2 ohm from 3-3 ohms, but I'll work the numbers later. Also according to the paper work in the boxes they are dual 3's
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Old 09-08-2007, 08:57 PM
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series the 2 coils to 6 ohms and then parallel the 3 subs to 2 ohms
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Old 09-08-2007, 10:38 PM
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Dual 3 ohm type r's, or any Alpine for that matter does not ring any bells at all...are you sure they're legit Alpine type R's? Also, I'm not aware of any MRP series amps that are stable to below 2ohms. Something does not sound right.
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Old 09-08-2007, 11:46 PM
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Last time I ran a mrp-m350 at 1 ohm you could smell things trying to let out the magic smoke, and it was hot enough to boil an egg on the heatsink.

Any lower than 1 ohm and I bet it'll just go straight into protect.

And again, to the best of my knowledge, Alpine never made a 3 ohm coil on the Type R, thats a JL thing.
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Old 09-09-2007, 10:00 AM
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i'll check it out again on tuesday, thats when i'm back in the shop. and i thought 1 ohm was too low also but i've seen it run lower.
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Old 09-09-2007, 01:00 PM
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I've seen 3 alpines in a box before.
the 3 subs are DVC 2, with each sub paralelled to 1 ohm and all 3 subs series-ed foir a TOTAL load of 3 ohms, like the paperwork says.

Run that on a MRD 1005 and they'll each get 250 wrms.
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