HK sound is oddly quiet

[Samf82m4]

Hey guys, I just upgrade from a 2014 435i to a 2015 M4. Both cars have the HK system but in the M4, the sound is way quieter than it was in the 435i.

Ex. In the 435, I would only need to put volume to 1/4 full and it would be perfectly loud and full. In the M4 I have the volume half way up and it's just not there. I've played around with the settings and can't seem to figure it out.

Any suggestions?

[Encanto]

There are no hardware differences in the HK from 2014 to 2015 - same speakers, amp, and OEM HU.

Most probably there is a difference in the firmware version in 2015.

[Samf82m4]

I did more research and it appears to be an issue with Bluetooth in the M models. Radio is perfectly loud and after doing some testing, it does appear that only Bluetooth is insanely quiet. I updated my iDrive this morning as well and same thing.

[Encanto]

Originally Posted by Samf82m4

I did more research and it appears to be an issue with Bluetooth in the M models. Radio is perfectly loud and after doing some testing, it does appear that only Bluetooth is insanely quiet. I updated my iDrive this morning as well and same thing.

I would assume that you have raised the volume in your phone while in Bluetooth, correct?

[noppon1412]

How did you fix the problem?

[JagR2611]

Originally Posted by noppon1412

How did you fix the problem?

Originally Posted by noppon1412

How did you fix the problem?

+1 - Interested & following

[Samf82m4]

Originally Posted by Encanto

I would assume that you have raised the volume in your phone while in Bluetooth, correct?

Yes, all the way up lol

[OnlyGerman]

Try another BT device for testing

[icegrill]

Amp