Have you ever felt like your stock speakers are just not good enough or you wanted more quality and bass? In this DIY video, I go over each step of installing and upgrading the dashboard speaker, the rear panel midrange speakers, the door speakers and tweeters and even the woofers behind the seats on my BMW Z4 (e89). The speakers and woofers I’m installing are AlphaOne by BimmerTech and I have been very impressed with the quality of the speakers, the sound they produce and even the packaging that they came in. All of the bracketary, adaptors and crossovers were included as well which made for an easy sound system upgrade. BMW Z4 speaker upgrade has been the best modifications I’ve done to the car so far!
My BMW Z4 (E89) came with the HiFi system (S676A), with included the following speakers:
5 x Midranges
2 x Tweeters
2 x Woofers
but you can also find the following sound systems on the E89 platform:
Base System:
4 x Midranges
2 x Tweeters
Top HiFi (S677A):
5 x Midranges
3 x Tweeters
2 x Woofers
1 x DSP Processor
Great videos! Keep them coming…
I’m contemplating the replacement of the subs behind the seats in my Z4. It is not an inexpensive upgrade. Is it worth it? Is the bass reproduction materially better than the OEM subs? I’ve read from many sources that the after market subs only sound a little better as the size, location, and limitations for sound are not ideal.
Hi Matt!
I can’t say for sure how much difference the subs alone make as I replaced all of the speakers at the same time. I do feel more bass and it’s a lot clearer, but the overall increase in sound quality with the full upgrade is what I noticed most. Have you done your other speakers already? Maybe start with that and then if you still want more, do the subwoofers as well.