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Date: August 04, 2003 at 07:41:41
From: Adrian Mack, [dialup-196-237.wasp.net.au]
Subject: EQ is certainly worth considering

URL: My website, Peerless XLS 12 Dual PR Sub Project, 18LW1400 vented sub, Horns, etc.....



The EQ is definitly a good option with this driver. For the Sigma Pro 18, I would use an SBB4 alignment, then use a sallen key 2nd order EQ, Q=1.5 (3.52db) @ 28Hz (which is also box resonance). Box size would be 5.7ft^3. Use it in eigth space conditions, and have an F3 of about 28Hz as well, which is probably the best thing you can do with this driver. About 118db is possible in this alignment with 150W and is excursion limited to this power level.

From memory, your using Eminence 18" parts, but I cant quite remember which one your using. Is yours the Sigma?

Adrian


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