Actually, Sound in Motion didn't use this method for Janix, but he is considering doing what we did when he does an amp swap.

As far as the "need" for a separate amp for the Bluetooth, I also thought that we would need one, but it turned out that we did not need one - and couldn't even make one work the way I expected to. Driving a dedicated speaker worked fine, and as far as the dedicated BT amp, I'm not clear on what it would be good for, to tell you the truth. Is there a specific reason that someone is saying that an amp is required? And is that amp including a speaker? Because they might just be recommending a non-DSP OEM amp that has a Bluetooth input to route the BT audio through the OEM speakers, and that wouldn't help in this instance.

I've talked to Sound in Motion, and they seem like a smart shop, I'd refer friends to them in a second - but I don't think they've got anything on us on this car. Neither S-I-M nor our store were familiar with the DSP bypass trick - it took TJJ to bring it up. And now that we've done it, I will put our ability to upgrade the audio in an X5 with DSP up against any shop in the US.

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