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Message: <blockquote data-quote="hispls" data-source="post: 7753307" data-attributes="member: 614752">Magnet is 70 pounds, coils are 3 inch  dual 2.8 ohm.   Pair of dual 2.8 ohm coils = .7 ohm in parallel, works well for most solid 1 ohm stable amps.   When we discussed having these new coils wound the goal was to have optimum physical dimensions and wire gauge and let the chips fall where they may as far as what the impedence turned out to be.Shocker Mike had tested the 4hp (4" coil) motor when it was in prototype phase and found that 3" coil got louder off of less power so he did not use that design and opted for his motor which is basically the same slugs but with an enormous top plate.  '05 revision uses smaller gap and pole vent and adds a copper shorting ring.  (mine are '05)</blockquote>

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