Audison Prima APBMW S8-4.2 8" Under-Seat Subwoofer for BMW & MINI — 150W RMS / 300W Peak, 4Ω

The Audison Prima APBMW S8-4.2 is an 8-inch (200 mm) shallow-frame woofer that directly replaces the original speakers under the front seats of compatible BMW and MINI models. It has the same flat design and acoustic performance as the previous S8-4 version, and fits all the BMW and MINI models that version fits. It handles 150W continuous (RMS) and 300W peak power at 4Ω, and an acoustically transparent fabric cover keeps debris off the cone.

Key Features

• 200 mm (8") shallow-frame woofer for a direct under-seat replacement
• Power handling of 150W continuous / 300W peak, 4Ω, single voice coil
• Neodymium magnet group with more power and control than ferrite at the same installation depth
• Electro-acoustic parameters customized for the BMW-MINI factory box, for powerful, crisp low frequencies
• Acoustically transparent fabric cover that keeps debris off the cone and avoids distorted sound under the seat
• Suitable as a sub-bass driver or, in many higher-performance BMW systems, as a mid-bass driver alongside a boot subwoofer

Technical Highlights

Audison's S-series notes say that in a passive mid-high filtered configuration with the supplied crossover, bridged amplifier channels can deliver 130W RMS to each S8-4 under the seat. Audison also says the best results come from a system upgrade with Forza bit amplifiers and BMW integration harnesses. Masori's compatibility list includes many BMW 1, 3, 4, 5, 6 and 7 Series models, the X1, and MINI F54, F55, F56, F57, F60, R60 and R61.

Ideal For / System Fit

• BMW and MINI models with a factory under-seat speaker position
• Systems with an amplifier that drives a 4Ω load or bridged channels
• Upgrades that keep the factory box and add punchier bass or mid-bass

Model-specific: it is a replacement for the factory under-seat driver, not a free-air subwoofer, so check your model in Audison's Sound Pack Configurator. Professional installation is recommended.

Installation Note

Fit the driver to the factory box with the supplied OEM-style gaskets. Confirm your amplifier is rated for a 4Ω load before connecting.

What's Included

1 x pair of Audison Prima APBMW S8-4.2 subwoofers with gaskets and fabric covers (confirm the exact contents with your supplier)

Precautions

• Confirm your exact BMW or MINI model and the 4Ω load rating of your amplifier before buying
• Match amplifier power to the 150W continuous / 300W peak rating to avoid damage
• Use the supplied gaskets so the driver seals against the factory box
• Professional installation is recommended

Audison Prima APBMW S8-4.2 vs. Audison Prima APBMW S8-2.2

Frequently Asked Questions

What is the Audison Prima APBMW S8-4.2?
An 8" shallow under-seat woofer that replaces the original under-seat speaker in compatible BMW and MINI models.

How much power can it handle?
150W continuous (RMS) and 300W peak, at 4Ω.

How is it different from the S8-2.2?
The S8-4.2 is a 4Ω version; the S8-2.2 is a 2Ω version with the same power and design.

Is it a new design?
It has the same flat design and acoustic performance as the previous S8-4, and fits the same BMW and MINI models.

What does the fabric cover do?
It keeps debris off the cone, which avoids distorted sound in the under-seat location.

Does it use the factory box?
Yes. Its parameters are designed around the acoustic load of the factory enclosure.

Which cars is it for?
Many BMW 1, 3, 4, 5, 6 and 7 Series, X1 and MINI models are listed; confirm yours in the Sound Pack Configurator.

Can it be used as a mid-bass driver?
Yes. Audison notes it suits mid-bass duty in higher-performance BMW systems with a boot subwoofer.

Product Specifications

Replace your BMW or MINI's under-seat speaker with a tighter 4Ω woofer — order the Audison Prima APBMW S8-4.2 today.

BMW and MINI are trademarks of BMW AG. Brand names are used for compatibility reference only.