[orangeglim]

So, I successfully installed the ASD bypass harness two days ago. I removed it tonight. With the harness in place the subwoofer under the driver's seat does practically nothing. Seriously, it might as well not even be there with the harness in place. Removing the harness and re-connecting the ASD module immediately brings the driver's side woofer back to life. So it appears the ASD module is also the power AMP for that woofer? I have a 2016 M235i with the HK audio.

Personally I like having more bass way more than I dislike having the fake engine sound. So, now I have a harness I'm not going to use. If anyone is interested I'd be happy to ship it out for $55.