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BMW standard components
Frequency-curve
BMW
GROUND ZERO
15dB difference between mid and high…
No high frequencies! Bad sound quality
Very linear. 4kHz peak caused by reflexions,
but not affecting the sound quality.
Reference Car
E87 130i before facelift with BMW standard-speakersystem
(10cm / 4“ fullrange and 16cm / 6“ underseat-woofer)
-2-