depends on the stage upgrade you go with. Not really hard to do but more tedious.

 

Tedious used to not scare me away lol. I am somewhat handy buy my days of fixing my own iphones and stuff are over.

 

I did stage 2 myself including the sound deadening. Give yourself a Saturday morning and watch the videos.

 

their website is not very informative but the youtube videos look like stage 1 is tweeters and 2 is amp - how muc did this run and how much better did it make it?

 

I'll second that. I have the Burmeister system so the amp and speakers are totally different. But I did the sound deadening throughout the car and it made a huge difference. Normal conversation at any speed or road surface is now possible. Bass is better and the overall sound of the system is improved. Sure it adds some weight, but it's not a track car or dedicated racer.

 

yes yes this. I wish they'd update it with their packages/stages/pricing. Would be sooo much more helpful and enticing than the "UNDER CONSTRUCTION" message.

any updates, @12v Nick ?

 

how much sound deadening did you do?

 

I am considering the Tweeter upgrade, How do I get them?

 

I did both doors and most of the rear area behind the front seats. I used dynomat and mass loaded vinyl. Against made a huge difference, well worth my time and cost.

 

when you say rear area, did you remove carpet? you talking floor or other parts?

and "mass loaded vinyl"... looked it up and seems like that's similar to dynamat, but on a roll, and you need to use separate adhesive?

Can you elaborate?

 

Yes, I removed the rear seats and the carpeting along with the rear sidewall panels. Dynomat absorbs vibrations, mass loaded vinyl block noise. No glue with the mass loaded vinyl. This pic is before the MLV.

 

wow, impressive, @Jim M. !

what specific MLV product did you use? And did that go OVER the dynamat?

 

I used: Soundsulate™ 1 lb Mass Loaded Vinyl MLV, Soundproofing Barrier
Got both the MLV and dynomat on Amazon. The MLV went under the carpet in the full size of the carpet.

 

Thanks for the details!

 

^ Nice work! Have long considered doing the same, or some of the same, as the massive wheel/tire "drums" on modern 911s (under a big, angled piece of glass!) not only get tiresome on long trips but end up competing with good noises from the flat six. Switching to all-season tires revealed just how much, but they too get louder as they age.

Do you have some sense of how many pounds were added in getting a good effect? Agree re: these are street cars. I like the romance of lightweight cars, but the reality is my 991 spends far more time as a daily on streets and freeways than it does on fun back roads and race tracks.