The 10" drivers have an Fs of 30 hz, 8 ohm 90db.

With push-pull you are looking at -3db so actually 87db/w. These may need an Rb enclosure.

The 12s are 93db/w and 8 ohms, 23Hz. So sealed p-p gives around 90db/watt.

The big rb Sub is an old design but IIRC is about 90db/w, 8 ohms, and ran happily off a 100 watt amp with hard use.

Its partner will use a new Canton 26cm woofer which is 3.5 ohms and 91db/w, and can handle 100watts. Similar box size and port.

I'm hoping that both Rb subs will get down to their Fbs without needing heaps of power and that's why I will use the HK 870 for them, to start with.

I will be sitting down with a box-plotter for all three box builds and make sure I'm getting down low enough before the EQ is added. I do have all 5 driver's TS's to do that with.

The room does give room gain >ing as f falls, but it's not a concrete room!

Warmest

Tim Bailey

Skeptical Measurer & Audio Scrounger

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Follow Ups Full Thread

Topic - EQ and subs? a continutaion from K-Bob's learning. - Timbo in Oz 00:27:08 05/04/17 (14)

RE: EQ and subs? a continutaion from K-Bob's learning. - JimL 17:19:43 05/12/17 (1)

Thanks I too would prefer to use parametric Eq, but the 1/3rd eq'rs were free - Timbo in Oz 00:21:45 05/13/17 (0)

RE: EQ and subs? a continutaion from K-Bob's learning. - Presto 13:03:38 05/07/17 (6)

The 10" drivers have an Fs of 30 hz, 8 ohm 90db. - Timbo in Oz 00:16:01 05/08/17 (1)

RE: The 10" drivers have an Fs of 30 hz, 8 ohm 90db. - Presto 15:34:09 05/13/17 (0)

Three 2.4kva circuits feed that room. - Timbo in Oz 23:04:42 05/07/17 (0)

Thanks, similar thoughts to mine. - Timbo in Oz 15:42:31 05/07/17 (0)

RE: EQ and subs? a continutaion from K-Bob's learning. - Kingshead 13:52:29 05/07/17 (1)

Likley not available down here in Australia. - Timbo in Oz 23:26:07 05/07/17 (0)

Bother, I meant SWARM, not storm. - Timbo in Oz 00:26:58 05/07/17 (2)

RE: Bother, I meant SWARM, not storm. - Duke 00:18:35 05/10/17 (1)

There are a few different possible permutaions and combinateions for phasing a stereo sub arc with a gap - Timbo in Oz 00:46:01 05/10/17 (0)

Good luck! - E-Stat 06:09:34 05/04/17 (1)

RE: Good luck! - Inmate51 08:38:02 05/04/17 (0)

Follow Ups

The 10" drivers have an Fs of 30 hz, 8 ohm 90db. - Timbo in Oz 00:16:01 05/08/17 (1)

RE: The 10" drivers have an Fs of 30 hz, 8 ohm 90db. - Presto 15:34:09 05/13/17 (0)

The 10" drivers have an Fs of 30 hz, 8 ohm 90db.

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