2016 - the pursuit of excellence.
Designing an excellent bass speaker at a reasonable price. And fits plug&play style into the original speaker slots under the seats of BMW cars. A couple of decades of experience with products from other quality speaker manufacturers helped me understand how even small details have a big impact on the final result.
2017 - testing and finishing
The product development had progressed so far that a rough version of the final product was available. A car equipped with these speakers was entered in the EMMA ( European Mobile Media Association ) car hifi competitions in the Master OEM category. The result was the Finnish Championship. For the rest of the year, the details of the speaker were fine-tuned and the product was refined and ready for production. The quest for the best possible end result in its price category resulted in a speaker called the Four Audio SW8-BMW.
2018 - towards the best.
The speaker was now ready for production and the next step was taken. Towards the best. The body, cone and top grille of the Four Audio SW8-BMW speaker are the same as those found in the market's best. To achieve even better power handling and cone control, the magnet was changed to a double magnet. An even lower bass response was achieved by improvements to the bottom baffle. Lower reproduction requires more range and power handling. These characteristics were achieved by modifications to the voice coil. This resulted in the AI Sonic BMW-SW8.
2019 - the best and the outstanding. Ready.
Now there's only a choice. Want excellent bass response at an affordable price? Or the best possible? Whichever you choose, you are guaranteed to get the best value for your money
This speaker is not directly compatible with BMW Top Hifi ( Harman/Kardon, Logic7, HiFi System Professional DSP etc. ) systems with equipment codes S688A/S677A/S752A. The reason is that these amps will not withstand a 2 ohm load like the S676A and S674A amps in the HiFi package and the player alone will.
BMW woofers
Suitable to ALL BMW models with underseat woofer locations.
Fs 68.5 Hz
Qts 0.97
Vas 17.3 liters
B/L 4.8
SPL 88 dB
impedance 2 ohms
2″ copper voice coil
Power handling 100W RMS / 180W MAX
Neodymium magnet
Coated paper cone
Nomex spider.
