when I put it back into the box!!!! If you've read any of my previous posts, then you remember me asking for help with my 10" MOMO SVC Sub due to it sounding "bad"..... broken/blown sound when played, almost like the speaker is torn....
Well, I had numerous people here tell me that the problem was probably due to the cheap amp I was using..... fair enough.... went and bought a Kenwood KAC-7201. I know it's not top notch, but better than what I had.
Prior to buying the new amp though I went and purchased a brand new in the box 10" MOMO DVC sub because at that point I believed the problem to be with the sub itself. I experienced the same trouble with the new DVC sub as the sound was virtually identical...... So, I eliminated the sub as an issue.
Next, I purchased new RCA cables and installed them. New amplifier arrived today. Installed it tonight, get it all rigged up and then tested tboth the SVC and DVC speakers.....SAME old response!!! The speakers perform very well when sitting outside the box (being driven only moderately). The speaker excursion on both is perfect and there is no noticeable distortion of any kind. Put the speaker down into the enclosure and bang, all of sudden, sounds like garbage!!!..... as if the speaker is about to break apart!! I even tried out the speaker-level inputs so I could be sure that the CD Player itself wasn't sending a bad signal out to the amp. Same response as with RCA cables.
A little background on the enclosure itself: I built it myself from 3/4" MDF. It's almost exactly. .6 cu ft interior. The front panel where the sub is mounted is actually double thickness as I adhered two boards together for more stability. I completely sealed all of the seams internally. The cutout hole for the sub is a little rough (not round really) as I did not have a pattern for the original SVC I used and had to cut around the edges of the hole to create a good fit. I filled the box about half full with fiberglass insulation. I took ALL of the insulation out tonight and dropped the sub back in to quickly test......sounded even WORSE!!! The speaker wires run directly through the side of the box (instead of using terminals) and this hole is sealed thoroughly from the inside. The outside of the box is covered with carpeting left over from an installation of carpet in our home.
Back when I actually had the SVC secured down into the box with screws, it did sound "good".... sort of.... but only from the cab of the car. When I would get in front of the sub and listen it was clear that some problem was existing.
So, experts, please help me. What would cause BOTH of these subs to sound perfect when played in the free air but when faced with the slightest amount of air resistance (even as they are just being set down into the hole cutout!!) they sound like they are blown and play all sorts of distortion?
Thanks..... I'm out of patience and done with spending money at the moment to fix this mess.