RL-P15's, Choose D2 Ohm, or D4 Ohm? - Home Theater Forum and Systems - HomeTheaterShack.com
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post #1 of 28 Old 02-21-08, 06:38 PM Thread Starter
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RL-P15's, Choose D2 Ohm, or D4 Ohm?

What are the criteria for choosing between the dual 2 ohm and dual 4 ohm versions of the RL-P15's? The numbers are different on the drivers, but are those numbers representative of all circuit config of the voice coils? Or, do they represent the coils wired in series, for 4 ohm and 8 ohm loads, respectively?

I just want to build what seems to be the standard sonosub design here: a 15" driver with 260 net liters, and a 14 hz tune. I have a Crown Macrotech 1200, which is very stable (and probably under-rated for power) putting out 700 wpc into 2 ohms. I'd like to build a pair of sonosubs for it.

Are the two subs mentioned effectively interchangeable?
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post #2 of 28 Old 02-21-08, 06:54 PM
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Re: RL-P15's, Choose D2 Ohm, or D4 Ohm?

Each coil is 2 or 4 ohms respectively.

If you are just planning one sub per channel get the D4 and wire each in parallel for a 2 ohm load on each channel. If you are wanting to bridge it use the same configuration just wire the two subs in series.

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Last edited by bonehead848; 02-21-08 at 06:59 PM.
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post #3 of 28 Old 02-21-08, 07:09 PM Thread Starter
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Re: RL-P15's, Choose D2 Ohm, or D4 Ohm?

Thanks, bonehead. But do the technical specs have any impact on the results? That is, what about the different listed Fs, Qts, etc, as seen here: http://www.soundsplinter.com/rlp15_s...formation.html
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post #4 of 28 Old 02-23-08, 08:22 PM Thread Starter
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Re: RL-P15's, Choose D2 Ohm, or D4 Ohm?

Well, however it works, I hope I can get the dual 4 ohm models to perform to their potential. I say that, because I have just picked up two of them, and I am quite excited about it.

20" x 12' Sonotube (brand) at the local supplier, CMC Services: $93.48, or $7.79/ft.

Anyone know about the Precision Port Flares and tubes? I think I could piece together everything for a 34" 6" port with 2 flares for well under $100 (sorry, I don't have enough time to make my own flares).

Are the precision ports, etc., quality equipment?
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post #5 of 28 Old 02-23-08, 08:38 PM
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Re: RL-P15's, Choose D2 Ohm, or D4 Ohm?

I've used the 4 inch Pecision Ports extensively and they are excellent quality. I would imagine the 6 inch model would be the same.




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post #6 of 28 Old 02-23-08, 08:42 PM Thread Starter
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Re: RL-P15's, Choose D2 Ohm, or D4 Ohm?

Thanks for the reference. That's how I'll do it, then.
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post #7 of 28 Old 02-26-08, 11:02 AM
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Re: RL-P15's, Choose D2 Ohm, or D4 Ohm?

Quote:
Chris in Dallas wrote: View Post
Well, however it works, I hope I can get the dual 4 ohm models to perform to their potential. I say that, because I have just picked up two of them, and I am quite excited about it.
Strange that the D2 version has certain specs that are better suited for home use than the D4 - especially Fs. From what I've read, any driver can be used, but EBS type enclosures work best when Qts is <.35. D4 is certainly better for most HT wiring situations.

I wonder if they model the same..

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post #8 of 28 Old 02-26-08, 11:59 AM
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Re: RL-P15's, Choose D2 Ohm, or D4 Ohm?

I ran 2 of the D4's in my car and moved them into the HT last year. Each one is in 10cubes tuned around 18Hz. Only getting 400watts each and they sound amazing for music and movies. I know they model a little differently, but in the real world I imagine it makes little difference.

My two fav demos are: Godsmack dualing drum solos & depth charges in U-571. One shakes the house to death, the other punches you in the chest with the kick drums.

I personally don't care for super low bass that just beats up the house, so I didn't do an LLT.
post #9 of 28 Old 02-26-08, 12:55 PM Thread Starter
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Re: RL-P15's, Choose D2 Ohm, or D4 Ohm?

mlstrass, did you use a ported design? Was it sealed? How does yours model?
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post #10 of 28 Old 02-26-08, 01:15 PM
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Re: RL-P15's, Choose D2 Ohm, or D4 Ohm?

Unibox suggests a sealed box for the D4's
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