Qwiz Posted July 2, 2023 Report Share Posted July 2, 2023 Interior Length: ~2,5m Interior Height: ~1,2m Interior Depth: ~1,7m Scenario1: Listening position: Driver/Passenger seat, sitting normal; Subwoofer alone playing: 15-27Hz: good 28-55Hz: undefined/muddy/muffled/doubled/overwhelming 55-80Hz: dipped/canceled/almost non-existent Scenario2: Listening position: Driver/Passenger seat, laying flat; Subwoofer alone playing: 15-80Hz: good Tried without any success: -changing subwoofer position -soundproofing everything but the ceiling Conclusions: -it's not a crossover issue -it's an acoustic issue How would you approach this issue? Quote Link to comment Share on other sites More sharing options...
Joe X Posted July 2, 2023 Report Share Posted July 2, 2023 You need to specify what's your vehicle, what is the sub model the box specs and some pictures if possible. Looks like a box issue, installing a DSP could help flatten your response but not the other issues, in some situations inverting the phase of the signal to the subs can help some cancellation issues, other times box location / sub, port firing direction etc can help. try what is suggested and if you still not get results then provide the details I asked about above. 1 Quote Link to comment Share on other sites More sharing options...
Qwiz Posted July 5, 2023 Author Report Share Posted July 5, 2023 The vehicle is a Kia Rio UB III 2016, European Edition, 3 Doors. Worth mentioning, once door panels&co. are taken out, that the inside-design looks very strange, such that there is like a tunnel space on both left and right sides, when looking from the trunk, between the trunk and the space where the back-door "is", you could put your hand from the trunk and come to the side all the way to where the back door is. - would not be a box issue, the same subwoofer in the same box sounds good in another car/in another enclosed space - a Home-Subwoofer instead, by keeping it connected to its home amplifier sounds similar - inverting the phase + time alignment + position settings + etc: slight differences, but with the same overwhelming feeling If when changing the listening position (like when I lay flat), the bass evens out and seems normal, wouldn't that suggest an acoustic issue? Quote Link to comment Share on other sites More sharing options...
Qwiz Posted July 9, 2023 Author Report Share Posted July 9, 2023 I will measure a 20Hz-200Hz sweep in REW. Quote Link to comment Share on other sites More sharing options...
Qwiz Posted April 25 Author Report Share Posted April 25 Turns out it's the acoustis. I have been in two Kias. Mine and another one. Both horrible. The person in charge of the interior acoustic properties is nonexistent to this vehicle producer. Quote Link to comment Share on other sites More sharing options...
Joe X Posted April 26 Report Share Posted April 26 Your box probably is hitting the car resonant frequency and may be oversized to show muddiness and showing a sharp drop at higher bass. It is interesting that you provide no box specs, you see it doesn't matter much that the enclosure sound normal in another car. Also don't see what is your system, models for the speakers, amps etc. You provide no pictures to document your tests, etc. Even if you have an acoustics problem, there should be a way to work around the issues even if that means try different components, etc. Quote Link to comment Share on other sites More sharing options...
CFD Posted April 29 Report Share Posted April 29 I think you're sitting in the middle of a bunch of resonance and cancellations coming off every part of the inside of your car. With the given information, I think you need to deaden everything, but it may not really work because windows can't be damped and the dimensions of the car cannot be changed. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.