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OK, I had a play with these subs today, they are being driven by a Blaupunkt THA555 amp.
I first put them in without sealing them, to be honest I didn't think they were that much better than the stock subs being driven by the blaupunkt amp.
So I took them out again and sealed them properly with silicon sealer, all round the edge of the driver and then loads into the hole where the cable goes into the cabinet.
WOW!!!!
These things when sealed go seriously low, and they have so much more control, my amps gain was 2/3 of the way round to get any volume without them sealed, and now it is only 1/4 to get the same volume.
These drivers are designed for a sealed encloure, the need to be sealed, and the sills give it a fairly decent cabinet size, I would guess around .7 cuft if it goes back as far as the back seat.
This is as good a system now as in my last car which cost me £2000. Very impressed.
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