[Custom Install]

Has anyone else experienced distortion when the car wakes up from stop/start?
At the weekend I had the HK at 70/80% volume and every time I stopped and then pulled away the sound became heavily distorted and dipped for a second.
To me this just reinforces the fact this system isn't right. As I pointed out in an earlier post the F82 system was never like this, and I owned 2 of those.

[BIGW0RM]

Originally Posted by Custom Install

Has anyone else experienced distortion when the car wakes up from stop/start?
At the weekend I had the HK at 70/80% volume and every time I stopped and then pulled away the sound became heavily distorted and dipped for a second.
To me this just reinforces the fact this system isn't right. As I pointed out in an earlier post the F82 system was never like this, and I owned 2 of those.

I have never noticed this. But I also have never once used auto/start stop. I cant stand that crap. I would suspect the voltage needed for the stereo to play at that volume might have dipped when the car used the starter.

Do you drive it often? Perhaps your battery is low. Or perhaps ASS is sucking your power to crank the motor back up? Or a combo of both might be happening here. Id show your dealer and see what they say.

[Custom Install]

Originally Posted by BIGW0RM

I have never noticed this. But I also have never once used auto/start stop. I cant stand that crap. I would suspect the voltage needed for the stereo to play at that volume might have dipped when the car used the starter.

Do you drive it often? Perhaps your battery is low. Or perhaps ASS is sucking your power to crank the motor back up?

I have it on a CTek charger if I'm not using it, however I used it quite a lot last week then noticed this issue.
Funnily enough it's the first time I've been using it in all comfort settings, I just remembered this. That's why stop start is active as I have it off in my M1/2 configs. Interesting.
Still, it seems wrong that the car would allow a drop in voltage enough to let the system distort.
Just can't put my finger on the stereo issue, on certain types of music (like Disco/Funk) it seems fine, I was putting it down to those types of tracks being less busy and cleaner sounding. But then I listen to some classic rock and it's average.
I'm keeping up to date with this thread, there must be an answer to get it better without a full on strip out of stock speakers. I do want to add a sub regardless and will go down that route.

[chicagofan00]

Originally Posted by Custom Install

Has anyone else experienced distortion when the car wakes up from stop/start?
At the weekend I had the HK at 70/80% volume and every time I stopped and then pulled away the sound became heavily distorted and dipped for a second.
To me this just reinforces the fact this system isn't right. As I pointed out in an earlier post the F82 system was never like this, and I owned 2 of those.

Could this also have anything to do with ASD? Wonder if you were to code ASD off and then still experience the issue with the Stop/Start.

[Murf]

So another option is available for those that are looking to replace underseat subs and don't want to go the Ghostsub route.

Integral Audio tells me that these will fit the G8X and run off the stock amps, no idea if they are a better or worse option than the Ghosts.

https://integralaudio.com/underseat-...s-f30-e90.html

[BIGW0RM]

Originally Posted by Murf

So another option is available for those that are looking to replace underseat subs and don't want to go the Ghostsub route.

Integral Audio tells me that these will fit the G8X and run off the stock amps, no idea if they are a better or worse option than the Ghosts.

https://integralaudio.com/underseat-...s-f30-e90.html

We need some reviews of these under seat woofers!

[BardG]

Originally Posted by Murf

So another option is available for those that are looking to replace underseat subs and don't want to go the Ghostsub route.

Integral Audio tells me that these will fit the G8X and run off the stock amps, no idea if they are a better or worse option than the Ghosts.

https://integralaudio.com/underseat-...s-f30-e90.html

Is there a sub under both front seats?

[BIGW0RM]

Originally Posted by BardG

Is there a sub under both front seats?

Yes?

[bmw noob]

Originally Posted by Flying05

Hmm. Going to have to research this more.

FLAC is compressed, but considered “lossless” quality. For mp3, 320kbps would be the equivalent. Any sample rate lower than that and there is an audible/perceivable difference in quality and detail from a cd source. Obviously, the change is progressive, but it is noticeable if you listen carefully on equipment that can resolve it (base car stereos typically won’t, but even the HK system should reveal a difference.)

Apple lossless is another example of a “lossless” compressed format.

Any of those three will give you the same (or at least an imperceptibly different) audio quality as a cd, but will save significantly in file size.

The wireless vs wired debate depends on many factors…the source, I.e. does “your” phone have a recent enough Bluetooth profile to support high res streaming? Some are software or hardware limited and down sample all audio files to a low quality mp3 equivalent. Same question of wired audio output from your phone, some may not allow full bitrate wired output.

The receiver capabilities…same question as the phone. Not all stereos can receive full bitrate audio, whether due to the Bluetooth profile or other soft/hardware limitations.

The actual music file…I believe certain sources (I.e. Spotify vs pandora vs Sirius) may limit the bitrate of audio being sent via Bluetooth?. I have no idea which, but I thought they did or could.

Part of the Bluetooth audio quality issues is that the presumption is that most people will be using Bluetooth earphones, and typically not high quality ones (e.g. beats, or AirPods, which are each ok but not amazing for resolving detail in music), and will be listening to modern music which is heavily synthesized and processed, and so “detail/quality” is less important to the listeners.

[Custom Install]

Originally Posted by chicagofan00

Could this also have anything to do with ASD? Wonder if you were to code ASD off and then still experience the issue with the Stop/Start.

Im not sure about ASD.
My issue is with the car being stock, I shouldn't have to do anything to have clean undistorted audio regardless of stop/start status.
Maybe I have a random issue?
Has anyone else had this issue on their car?

[bmw noob]

I remember when I got the Acura RSX when it first came out the audio sucked. Then a few months later there was a TSB that the wire polarity at the amp had been reversed at the factory and the dealers had to switch positive to negative at the amp (or something like that). The stereo was much better after.

I wonder, considering this "should" be the exact system from the g20, and people are saying their m340 sounds much better,, if there isn't some issue with the system itself.

Of course, this is now a year into production, so it is unlikely they have not identified such an issue already.

[spridge]

Originally Posted by BIGW0RM

Yes?

Yes.

[BardG]

I'm now forced to take a MY23 I'm looking forward to whatever upgrades they include, one of which I hope is a better sound system option. 🤞

[Jon H]

Coding off ASD in the Supra improved the sound quality and volume.

[Murf]

My Bavsound subs come in today, will install this weekend and review. Does anyone know the torque specs for the front seat bolts?

[BIGW0RM]

Originally Posted by Murf

My Bavsound subs come in today, will install this weekend and review. Does anyone know the torque specs for the front seat bolts?

I was literally about to ask you about them. I wondered what your review was. Looking forward to your feedback.

[abdulisraddd]

Originally Posted by BIGW0RM

I was literally about to ask you about them. I wondered what your review was. Looking forward to your feedback.

Mine arrive tomorrow and will install tomorrow night. Will update as well

[androidtopp]

Originally Posted by abdulisraddd

Mine arrive tomorrow and will install tomorrow night. Will update as well

I grabbed some under-seat BavSound subs as well on the recent open box sale - should arrive Friday but alas, I'll be overseas on business so it'll have to wait for the install. Looking forward to having other people's experiences to go off for my own install...but from what people have provided so far, looks pretty simple.

[Murf]

Ok they're in. Took me about 20 mins for the passenger side and about a half hour for the drivers side because of less clearance on the back screws. Never disconnected the battery or anything. I did re-torque the seat bolts to 42nm, not exactly sure if that is correct since I found that on the F80 boards but it felt nice and snug. The speakers literally just drop in. One thing I noticed, alot of people comment on how heavy the Ghosts are compared to stock but I didnt find that big of a difference, couple ounces at most. Perhaps they are comparing to non HK systems but our underseats are fairly stout.

On to sound. I started with PHD by Crystal Method because its one long bass hook and then moved on to some Pharrell and then the Eagles. About 15 mins of listening in all. First, loudness - this is where I feel most people might be dissapointed. It's not much louder, at all. Maybe 10% if that. BUT, it is cleaner, by alot. For example at 70+ % volume with stock subs I can't go above mid pt on the bass slider or it distorts. With these I can actually crank the bass slider to max and only then does it just starts to break up depending on the song. And this is on the B&W codec which is significantly more bass forward than the stock HK codec. It's also maybe 20% punchier than stock but probably also due to being a cleaner output. So that's good at least.

I don't think its mind blowing or 2x more bass or whatever the ads say, at least on our systems. It's def an improvement and to that end I am happy. I'll give it the 10 hours of breakin to see if it improves, sometimes speakers really open up once broken in. But I dont have my hopes up. Is it worth $500? Not to me at least, although the quality and fitment is topnotch. For $300-350ish, this is a solid mod, especially for guys like me that like to tweak but don't want to start running wiring and pulling the trunk apart. I'll try them tomorrow with the stock HK codec but already feel like that would be a step backwards. The 100 day return window is nice but not sure i'd even bother as they are an improvement and I'm not going to do any other audio mods, it's pretty much underseat dropins or nothing for me. If you are even a little bit of an audiophile you wont be satisfied with these alone. Maybe with their own amp, or with the full Bavsound set it would be a different story, idk.

[BIGW0RM]

Thank you Murf! That settles that for me once and for all. Thank you very much.

[nearwater4me]

Originally Posted by Murf

Ok they're in. Took me about 20 mins for the passenger side and about a half hour for the drivers side because of less clearance on the back screws. Never disconnected the battery or anything. I did re-torque the seat bolts to 42nm, not exactly sure if that is correct since I found that on the F80 boards but it felt nice and snug. The speakers literally just drop in. One thing I noticed, alot of people comment on how heavy the Ghosts are compared to stock but I didnt find that big of a difference, couple ounces at most. Perhaps they are comparing to non HK systems but our underseats are fairly stout.

On to sound. I started with PHD by Crystal Method because its one long bass hook and then moved on to some Pharrell and then the Eagles. About 15 mins of listening in all. First, loudness - this is where I feel most people might be dissapointed. It's not much louder, at all. Maybe 10% if that. BUT, it is cleaner, by alot. For example at 70+ % volume with stock subs I can't go above mid pt on the bass slider or it distorts. With these I can actually crank the bass slider to max and only then does it just starts to break up depending on the song. And this is on the B&W codec which is significantly more bass forward than the stock HK codec. It's also maybe 20% punchier than stock but probably also due to being a cleaner output. So that's good at least.

I don't think its mind blowing or 2x more bass or whatever the ads say, at least on our systems. It's def an improvement and to that end I am happy. I'll give it the 10 hours of breakin to see if it improves, sometimes speakers really open up once broken in. But I dont have my hopes up. Is it worth $500? Not to me at least, although the quality and fitment is topnotch. For $300-350ish, this is a solid mod, especially for guys like me that like to tweak but don't want to start running wiring and pulling the trunk apart. I'll try them tomorrow with the stock HK codec but already feel like that would be a step backwards. The 100 day return window is nice but not sure i'd even bother as they are an improvement and I'm not going to do any other audio mods, it's pretty much underseat dropins or nothing for me. If you are even a little bit of an audiophile you wont be satisfied with these alone. Maybe with their own amp, or with the full Bavsound set it would be a different story, idk.

Thanks for the honest review.
Just as I suspected, USW component change alone wouldn't make a significant difference in bass reproduction.
When paired with an aftermarket DSP amp w/ full custom tune, however, the difference was significant.
I was very happy with the F87 system from Integral Audio and am eagerly waiting for a similar aftermarket system for the G8x.

I have to admit though, the HK in my G82 doesn't sound THAT bad compared to when I first took delivery.
Maybe I'm getting used to it, or I'm starting to forget how much better the previous system was.

[E_R_S_M4_Comp]

Interested to hear (no pun intended) if anyone as installed other options (such as Bimmertech etc..) and the comparison to stock.. Anyone?