[BrokE350]

Posted this on the audio forum, but maybe this will get more responses as it could be car specific.

Well, I’m a little disappointed because I just transferred over my bass setup from my other car to my 2009 mercedes e350, and it’s wired up perfectly, but I can hardly hear it inside! It’s in the trunk, and my car doesn’t have the fold down seats option. The sound deadening is so heavy back there that it sounds like it didn’t even make a difference. Open the trunk and you can CLEARLY hear it very loud and rattle anything it wants, but it feels stock while sitting in the drivers seat.

Has anybody else had this happen, and how did you fix it? Can I remove the sound deadening to let it travel through, and where would this be (W211 chassis)? Perhaps I need better sound deadening around the trunk seals? Would really appreciate some advice, I’m extremely disappointed.
Thank you in advance.

 

[EFSiR]

Apply steeper crossover AND allow air pressure to cross from the trunk into the car

 

[BrokE350]

Apply steeper crossover AND allow air pressure to cross from the trunk into the car

Okay, I’ll do that to the crossover.
For air pressure, I’m thinking I take out the speakers from the rear deck. Also, since my backseats are just solid, I’d like to hear thoughts on using a 2” hole saw and cutting out a decent amount of metal. Maybe like 15 holes.
my guess is the back surface is 2’ x 4’, that’s 1152 square inches (surface area). A 2” hole had a 3.15” surface area x 15 is just under 50”. That’s like nothing to the back wall in my opinion and would allow some good airflow. Definitely would like to hear thoughts on this first though.
I’d also like to add that the bass is way louder when the trunk is open (even when sitting in the car). Nearly the same as when the setup was in my other car. I’m going to mess with positioning of subs tonight, do the crossover you mentioned, and if I get around to it remove rear deck speakers.

 

[EFSiR]

Cross with 24dB and keep the rear speakers. Don't cut into anything but the rear deck. You may experiment first by temporarily removing the rear speakers but it won't take much of an opening if you cross it at 24dB/....

And play with frequency cut off. I recommend you start at 80Hz and keep going down....

 

[duh_vinci]

Additionally, did you try to swap the phase on the subwoofer? In some cases, that's all it takes to make a difference (along with woofer positioning)

Regards,
D