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      09-15-2012, 07:03 AM   #9
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mob17's Avatar
United Kingdom

Drives: E92 335D
Join Date: Mar 2012
Location: East Midlands, UK

iTrader: (5)

Steps 1 and 2 are required so it enables you to raise your amp gains after level matching, if required/suitable. It isn't suitable for you as your centre eill be attenuated. And even though the ms-8 will limit the power of amped channels, its still much better for you to level match everything before, you'll get a better autotune.

So you've got 3 L7 mids across the front, and you're amping two of them. So you're going to have to either somehow get a much more efficient centre to match the SPL level of your other 2 L7 mids on ~ 150w of power. Maybe a kappa infinity 42.4? If you're after SQ this won't really be a good idea though. Or you could keep your L7 centre and upgrade to Morels, which are slightly less efficient and also 4 ohm, so they might even match your centre even on 150w. There are online calculators to estimate this. Have a play with different combinations and see what works. You can buy Morels for 230, the extra 50 definately worth it.

I'd measure the SPL levels from the driver head position.