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Fascinating project backed up by really well executed video footage and voice over.
Any other upgrades planned ?

Cheers Spike
 
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Audi Q3 2015, S Line Plus, 2.0 TDI, Automatic
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Hello Alan,

Did you encounter any additional vibration noises from the upgraded sound system?

I have the basic Audi stereo system in my Q3 and after removing the door cards, there were a lot of vibrations from the plastic interior panel and the clips.

Did you install any sound deadening material?

Thanks,

Brandon
 

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Discussion Starter · #23 ·
Hello Alan,

Did you encounter any additional vibration noises from the upgraded sound system?

I have the basic Audi stereo system in my Q3 and after removing the door cards, there were a lot of vibrations from the plastic interior panel and the clips.

Did you install any sound deadening material?

Thanks,

Brandon
Hi Brandon, not at all, but that reminds me that I shot a bit of video addressing this as part of the install... I have been able to crank up the volume to blowing the head giblet levels. ...here it is..

 

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Discussion Starter · #24 ·
i realise that there is also a lot of learning and aspects in the tuning, so I will post a video in a little while with the outcome, and also share my Tun file with the settings and PEQ filters to get the sound I like... will be a weeks or so yet...
 

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Discussion Starter · #25 ·
Fascinating project backed up by really well executed video footage and voice over.
Any other upgrades planned ?

Cheers Spike
Thanks Spike.. no plans at the moment... just hoping my aching bones calm down from this one ;)
 

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Discussion Starter · #26 ·
Hello Alan,

Did you encounter any additional vibration noises from the upgraded sound system?

I have the basic Audi stereo system in my Q3 and after removing the door cards, there were a lot of vibrations from the plastic interior panel and the clips.

Did you install any sound deadening material?

Thanks,

Brandon
Just following up on the video, check out the door clip mechanism... it might be that when you put the door card back in the clips were not in released mode, so maybe they are not pushed in right... thus not properly holding the door card in place... I could imagine this might be the cause of rattles... I found by making sure the clips were in released mode ( with the 4 lugs up against the white plastic end), than the doors went back very securely... need to be really careful about lining the white ends with the hole before pushing home... new clips are really cheap from Audi...cheers alan
 

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Audi Q3 2015, S Line Plus, 2.0 TDI, Automatic
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Just following up on the video, check out the door clip mechanism... it might be that when you put the door card back in the clips were not in released mode, so maybe they are not pushed in right... thus not properly holding the door card in place... I could imagine this might be the cause of rattles... I found by making sure the clips were in released mode ( with the 4 lugs up against the white plastic end), than the doors went back very securely... need to be really careful about lining the white ends with the hole before pushing home... new clips are really cheap from Audi...cheers alan
Hi Alan,

Thanks for your reply.

I watched your video. With my clip holder housings, they cracked aswell. I replaced with some JB Plastic Weld.

The door panel was still rattling, so I used rubber tape and foam behind the door cards. Seems to have solved the problem 👌🏼
 

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Discussion Starter · #29 ·
Ok, if you make it through this video, your nerd dial is at 11 🤣

After all that good measuring stuff, the listening is telling me more than the measurements have... I am further working on the sub integration and (as is more normal) putting a gap between the crossover frequencies (rather than overlap as in the video)... interestingly this is resolving issues that I had treated with PEQ, and so it may be that no EQ and better sub vs mid woofers is a more effective solution.... a learning experience 😅
 

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Discussion Starter · #30 · (Edited)
some significant changes to the set up. eliminated Bose centre speaker, went active crossover on front speaker system. optimised subwoofer (blocking bass reflex and PEQ). Re worked time alignment using impulse response data.

re focused attention on subwoofer integration at cross over frequency, using audible of phase cancellation (method 80Hz sine wave, and phase inversion)...

P.S. in the notes is worth reading :)
 

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Discussion Starter · #31 · (Edited)
I am just following up on the comment/question I raised in the response above “it’s a bit early I to be sure, and I am just starting to line out the system, but am hearing, when I switch it in, the Gala system having an effect on the sound at speed... I wonder if anyone knows the ins and outs of this, and I think it’s doing speed dependent DSP, I.e. much more than volume adjustment...”

I have now done some measurements on the frequency response vs volume of the Delphi head unit I have... indeed there does appear to be some volume dependant ’loudness‘ feature in play. So at low volumes the treble and base are boosed more, but as the volume increases, the treble and bass are less boosted. There is also a hump, which leads to attenuation in the 2-3 Hz region. This matches up quite well with the most sensitive part of human hearing (see Fletcher Munson Curve). So, clearly volume change, and hence GALA is doing more than just moving the volume up and down, and is doing DSP, in part to adapt the volume perception in line with the ears equal loudness perception.

I have plotted below the frequency response of the head unit with pink noise (should be flat) at Vol. 5, 10, 15 and 20. And annotated this along with the Fletcher Munson equal loudness curves... clearly similar.


2538

I am actually quite pleased that this volume dependant adaption is because it explains some of the trouble I have been having getting balance and gain structure right... I now know what to do, which is to match the gain structure to the curve changes (volume in range e.g. 5- 15) so that the playing volume is right to my taste needs... the limitation is of course I have only 10 clicks on the volume knob for my useable range, but hey, the alternative is using the vx800/8i external volume control which I don’t want to do...

So, lots of fun and learning, but I thought I would also share this interesting learning: GALA being more than just volume adjustment and in fact being also DSP 😅
 

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Thanks as always for the interesting read, you leave us in no doubt that there is a least one RSQ3 owner out there who is also a genius.. :)
 
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