BMW 3-Series (E90 E92) Forum - View Single Post - Mak's Stage 3 Sound upgrade with P88RS JL XD600/6 JL 1000/1 JL 12W7 Focal 100KRS

taibanl · 02-12-2013, 04:50 PM

so...

1) why do you have an underlap (gap) from 160-200hz?
2) interesting that you have a 12dB slope on the underseat HP but a 24dB slope on the sub low pass... the 12dB slope is a 180 degree phase shift.

02-12-2013, 04:50 PM	#17
taibanl Brigadier General 281 Rep 4,121 Posts Drives: BMW Join Date: Sep 2010 Location: NA iTrader: (4)	so... 1) why do you have an underlap (gap) from 160-200hz? 2) interesting that you have a 12dB slope on the underseat HP but a 24dB slope on the sub low pass... the 12dB slope is a 180 degree phase shift.
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