APK 690APK 690 systems are ideal for car models with doors equipped to house elliptical speakers, featuring 6x9 in. woofers and AP 1 tweeter with dedicated crossovers APCX TW 690. The crossovers are ultra compact to facilitate their installation, and include an attenuation of the tweeter output level for outstanding fine tuning. The R & amp; D team optimized the electro acoustic parameters of the new woofers for installation in the car door, respecting all
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