A complete front and bass speaker upgrade for base audio BMWs, built from Match UPGRADE parts designed specifically for BMW. You get a Match UP C42BMW-FRT.2 2-way front component set and a pair of Match UP W8BMW-S 8″ under-seat subwoofers, all on BMW-specific baskets and connectors so they drop into the factory positions.

The front set pairs a 4″ coated paper mid-woofer for the door with a 25 mm silk dome tweeter, rated 60 W RMS at 4 Ω, with separate crossovers and a 3-step tweeter level. The UP W8BMW-S subwoofers are ultra flat 8″ units with stiff fiberglass cones and oversized 42.5 mm voice coils, 2 Ω each, and come with BMW connection cables for the original harness.

Kit B uses the FRT.2 front set, which suits these cars: 1 Series F20 F21, 2 Series F22 F23 F45 F46 F87 (M2), 3 Series F30 F31 F34 F35 F80 (M3), 4 Series F32 F33 F36 F82 F83 (M4), 5 Series G30 G31 G38 F90 (M5), 6 Series F06 G32, i8 I12 L15, X1 F48 F49, X2 F39, X3 F25 G01, X4 F26 G02. Not sure which kit fits yours? Check the table below or send us your registration and a photo.

The speakers will run from the factory system, but to get the most from them pair this kit with our Subtronix BMW plug and play amplifier kit, or buy the full kit with both.

Will it fit my BMW?

Is my car base audio?

These kits are for BMWs with the standard (base) audio system, with or without ASD (Active Sound Design). The quick check: sit in the car and look at the small triangle panel behind each door mirror, at the front corner of the door window.

• Harman Kardon badge on the panel: Harman Kardon system, not compatible.
• A tweeter with no badge: usually the HiFi system, not compatible.
• No tweeter: base audio, compatible.

Some early E-series 1 and 5 Series cars have a tweeter or an empty grille there even on base audio, so if in doubt send us a photo and we will confirm before you order.

Tweeter panels

The front set is a 2-way system: the tweeters fit in the triangle panels behind the door mirrors. Base audio cars do not have tweeter panels there, so you will need a pair. Everything else for the front set is in the box, including the crossovers and plug-in cabling for the tweeters, so fitting is completely non-destructive. Tweeter panels are not included in this kit. They are available from BMW dealers; part numbers to follow, so ask us and we will point you to the right ones for your car.