Gravity G3-15D4 15" Dual 4-Ohm Car Subwoofer 5.25 Inch Speakers some BMW models with non-standard

some BMW models with non-standard fixings may require the separately available APBMW A4E adapter kit

13-Channel Processing: Supports detailed routing and tuning for complex multi-amplifier car audio systems

confirm the vehicle's factory opening

while the tweeter high-pass filter is 4 kHz with a 12 dB/octave slope

Gravity G3-15D4 15" Dual 4-Ohm Car Subwoofer 5.25 Inch Speakers some BMW models with non-standardThe Gravity G3 15D4 is a 15 inch component car subwoofer for systems that need dedicated low frequency output beyond what full range speakers can provide. Its dual 4 ohm voice coil design gives installers series or parallel wiring flexibility when matching the subwoofer to an amplifier. This model is intended for use in a properly designed enclosure and vehicle audio system. With 1,200 watts RMS power handling and a 2,400 watt peak rating, the G3 15D4