They will physically fit with no issue, and you have 4 channels of sub already provided in your DSP amp. The stock DSP amp, however, will not provide nearly enough power to drive them adequately (imo), so you may also end up investing in a small mono or 2 channel amp to make yourself happy.
I bought a set of M-subs, and they actually sound great. However they arent built very well. Two months after I installed them the left one stopped working. I replaced it and the replacement stopped working and the right is starting to fail also. At 500 a piece thats was about 1500$ for woofers that didnt last six months!! Sooo I replaced both of them with 2 JBL woofers and a n amp. for about $1000. They also came with a warranty! My opionion buy any system but the BMW M subs. Youll save lots of money! Just my experience! Good luck!
My JBLs are in a narrow box next to each other right behind the rear seats. Luckly the M5 has a big trunk so I still have lots of room in it. I think im gonna mount one under the rear deck where I had the free air woofers located. Curious as to how much of a difference it makes not being in a box. They are waaaay stronger than the M subs. I had to turn the amp to the lowest setting. I like bass but I dont want my trunk vibrating like crazy.
I could have saved more money with an amp with less power. Im happy for now
Now I have an awsome sound system to match my awsome car!
I drive my subs very hard and very loud everytime I play my stereo and I have zero issues.
The stock amp appears to be powerful enough as I hear no distortion on the subs even on loud volume. But like Doug, I also think I am putting too much stress on the stock amp driving the big subs and all the speakers so I plan on installing a separate amp to drive the subs soon. 'Will post updates once I am done.
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Dan
Tubi Rumore exhaust, BBS RGR rims; Polk Audio Tweeters, Focal Speakers; Video Interface Module + Panasonic DVD Player + Integrated 120 gig Video iPod; 8000K low beams, Angel iBrights, Valentine 1 Radar Detector; Laser Interceptor Laser Jammer; All LED interior lights, LED footwell lights, LED trunk lights, Ultimate Cup Holders, face lifted Front and rear LCI LED turn signals; 3rd brake light LED flasher, Polished piano black front kidney grills and side grills; charcoal filter delete; ash tray delete; Auxiliary Input upgrade; LED license plate lights; RPI Ram Air Scoops + Block off plates; BMC Air Filters; Glove compartment LED light; Carbon Fiber steering wheel trim. Etc. Next is Alpine back up camera.
for woofers that didnt last six months!! Sooo I replaced both of them with 2 JBL woofers and a n amp. for about $1000. They also came with a warranty! My opionion buy any system but the BMW M subs. Youll save lots of money! Just my experience! Good luck!
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