The DSP amp is 330 W total power across 14 individual speaker channels:

* 4 tweeters at 15 watts per channel
* 2 midrange speakers at 15 watts per channel
* 4 woofers at 30 watts per channel
* 4 subwoofers at 30 watts per channel

I have never seen any specifications for the standard X5 amp. However, the standard E38 amp, which is probably very similar, is 10 channels at 15 watts per channel (4 tweeters, 2 midrange, 4 woofers)

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2000 E38 750iL Highline Edition, Upgraded with the lastest 2006 X5 Electronics
MKIV Navigation, 16:9 Display, Bluetooth, TV/Video with Backup Camera, Sirius, and Aux Input