MATCH UP X4BMW-FRT.3 Coaxial Speaker Upgrade - BMW E83 X3 SUV 04-10 GPS 8 (one for each output

8 (one for each output channel) Filter Type Full / High Pass / Low Pass / Band Pass Filter mode and slope Linkwitz @ 12 / 24 dB Butterworth @ 6 / 12 / 18 / 24 dB Crossover frequency 68 steps @ 20 - 20k Hz Phase control 0° - 180°

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The iLX-F905D Alpine Halo9 is the second generation of Alpine's world-famous Halo product line

The lowering amount shown is based on measurements taken from a new vehicle after this kit was test-fitted

MATCH UP X4BMW-FRT.3 Coaxial Speaker Upgrade - BMW E83 X3 SUV 04-10 GPS 8 (one for each outputMATCH UP X4BMW FRT. 3 Coaxial Speaker Upgrade These kits will fit the front or rear doors, if you wish to upgrade front and rear speakers you will need to purchase two of these kits. Premium cars deserve premium sound the basic speaker setup in BMW vehicles does not meet the expectations of ambitious music lovers in many cases. For all those, the tailor made MATCH UPGRADE speaker systems offer the perfect alternative that opens new horizons of sound.