Who has upgraded subwoofers behind seats with the Hi Fi system?

[THECATMAC]

Hello, so has anyone replaced this 10 ohm subwoofer with something else. Appreciate your help and/or advice! 2005 Z4

[Glow4]

Hi, I am not sure how recent your post is but as I have an issue with either the amplifier or subwoofers I want to follow-up on your post. My subwoofers (behind the seats) are only 2 Ohm (these are the OEM ones), so I am guessing yours are already a replacement. Do any of the members have issues with the bass sound? I have put my DSP 80hz and 100hz at lowest point and still with some songs the subwoofers make a grinding sound (not sure if this is the correct word). I took the subwoofers out and they seem fine - also measured with a a ohm meter. Hoping to get a resolution or better understanding on the topic. Thanks!

[Zedebee]

There were two versions of the 10 speaker set up - “Hi Fi Speaker system” and “Hi Fi Professional DSP”. I believe the former has 10 ohm speakers which should be easily upgradeable, whereas the (more powerful) DSP system has 2 ohm speakers with a 30v feed which are very difficult to upgrade.

[Glow4]

Great input @Zedebee - thanks