Thanks Bassaholic.
AJ ran ONE amp at Drag Combat, due the long series of dramas we experienced with the MTX 1000D (CCS have since replaced them with brand new 81000Ds, thanks guys).
OK, Mister Sparco I'll type slowly so you can understand it!

Four 8 ohm subs in parallel, makes a nominal 2 ohm load, which at 56Hz rises to 5.4 ohms.
ONE (1) MTX 1000D onto a 5.4 ohm load, makes around 650Wrms, and gave mid-high 150s at DC with the new build.
Now, take the same load, and bridge a PAIR of MTX 1000Ds on. Each amp then actually sees 1.35ohms, making (on paper) 6dB more power.
Now back to the original point Mister Sparco came in on, I said the Qld meters, wether it be Northfields', Marcoochy's or ours all read with 1dB of each other. AJ'S CIVIC, WHICH WE USED TO WIN SYDNEY AUTOSALON FINAL BATTLE 2001 SPL KING, CAME WITHIN 0.8DB OF HIS BEST EVER QLD READING, ON THE SYDNEY METER.
So, I don't see how the Sydney meter can be 4dB lower than Qld's. We proved it by kicking ass and winning SPL KING 2001 (again!) with AJ's old set up, with tiny 3.5 cube boxes and single 6" ports!
Mister Sparco, I realise that having a go at me is now somewhat of a CAA tradition, but at least get your facts straight before you try. You seem to forget, that everytime INCAR take our big hitters to a comp, we ALWAYS go home with the trophy, regardless when, where, or what meter it's on. LOUDEST is always LOUDEST.
Phil
PS if you thought our old cars were loud, you're not going to beleive what's coming!
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SPL KINGS 2001
153.4dB Loudest Sedan
158.5dB Loudest Single Woofer
160.8dB Loudest 4 Woofer
166.2dB Loudest to Date
BEYOND AUDIO distributors