Replies (7)
G24 on 12/23/2004 22:50:47
What's up
G24 on 12/23/2004 23:00:22
I'm having a problem with getting my bass to sound the way I want right now I have a clarion dxz725 hu and a ppi 4240 amp. I'm using a 12" sub that I bought from a company around where I live. I can't seem to get the bass sounding the way I want I designed a ported box that is tuned to 33Hz I'm using 2 - 3" PVC pipes for ports. The box fits across the rear seats in behind them so you can't see into the trunk. What I'm noticing is the bass deep I get alot of mid sounding bass. I've been told that setting the hu crossover to 80Hz should be fine but it does sound good I have to drop it to 50Hz and a Q of 2 to get strong bass. I have varied the crossover from 40-150Hz still doesn't sound right. The ports are close to the sides of the box how much does this effect the performance I haven't found any info on this. Also could it be that I'm losing sound because the box isn't isolated enough from the trunk. Any idea's on what to do to fix problem what is a good frequency to set both hu and amp crossover
swez on 12/24/2004 08:17:26
Side ports are fine if they have room to breath. The lack of low bass may have a lot to due with the enclosure size and design. Say more about your sub and that enclosure design. We may be able to help ya out on a few things.
The LPF @ 80 Hz., is what we normally recommend for bass. Some do go a tad lower or higher, depending on the system they have set up. One thing I am not sure I get, is the placement of your sub box??? Most find it best in a car to place the sub in the trunk, firing to the rear bumper. If you have flip down seats that open to the trunk, even better to drop one seat down and rest the back of the sub box against the other rear seat back. Try that and see what ya get.
Swez
MrBrownstone on 12/24/2004 14:08:14
You may want to look at your box design, and the woofer itself. Start with manufacturer and model of woofer.
Kinda like going to the doctor for a prescription and not having an exam, right?
swez on 12/25/2004 10:49:16
Good analogy... Mr. B.
Swez
speakerman3 on 12/26/2004 03:34:04
It's hard to say without more information, but the tuning of the box and ports could be what is not satisfying you. Try stuffing a pair of socks--a very technical fix, I know--into each port to give you a temporarily sealed enclosure. See how that affects the overall sound quality. Even if the enclosure is not perfect, sealed enclosures aren't as affected by being a little under or over on volume, so it shouldn't be a problem. This should give you some idea whether the tuning of your box is the problem. If the box sounds a lot better sealed, recheck the tuning. Or, just use something to seal it permanently.
I'm more interested in sound quality than SPL, so I'm biased towards sealed enclosures anyways. You just might want to find something a little more complete, and attractive, than a pair of socks if you are going to seal it long term.
Chris
swez on 12/27/2004 22:35:49
Yep, depending on the sub characteristics and the enclosure size, you may find better overall performance with that high tech fix mentioned by Chris. (speakerman) Plug the ports and use as a sealed box. If it works better this way, can either remove the ports and block the holes or just get plugs for the ports.
If the box is too small for that sub, deep lows will be lacking. If the Sub is not designed for ported applications, you'll have problems there too.
What sub do you have and do you have any links to tech specs? If yes, we may be able to fine tune the system for better results.
Swez
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