Phoenix Gold ZDBMW4CX 4インチ BMW スピーカーアップグレードキット 60W RMS

The aluminum cone really tightens up the midbass compared to the stock paper drivers, and the 60w RMS rating means they handle my head unit’s volume without distorting. A bit of a fiddle to seat the grilles, but once they clicked in, the clarity at highway speeds sold me.

Took about 20 minutes to swap out the factory units in my E90, and the 60w RMS handling really wakes up the low end without any distortion at highway volume. The aluminum cones keep everything punchy even with the windows down.

Took a bit of fiddling to get the wiring harness seated just right, but once they were in, the aluminum cones give a noticeably cleaner midbass than the stock paper units. For the price, the 60w RMS handling feels like a solid upgrade for the doors.