|   does anyone know what are some common low frequency problems | mikert456
Dec 12, 2002 5:23 PM | | I was wondering if anyone out there knows some types of room problems. For I know my room is ruining my music somewhere between 50 and 75Hz due to the fact the kick drum sounds extremly bloated and not tight at all. Ive tried placement Ive tried cross overs, and still the problem exist. The only thing that seemed to help a little is putting cusions behind the ports of my pw2200. But I emphasize little help it was. I'm not sure exactly how to explain my problem but I was wondering if anyone could give some explanations or web sites on room problems that could help me find out exactly what my problem is. once I know what my problem is then at least I could try to fix it. Thanks. |
| re: does anyone know what are some common low frequency problems | cicone
Dec 13, 2002 7:47 AM | | Mikert, Placement will cure most problems...here's a list of url's. The more you read, the more you'll get a feel for what's happening. Good luck. http://www.acousticsciences.com/index-original.htm http://www.audiophilia.com/hardware/tubetrap.htm http://www.soundsamazing.ca/speaker%20set%20up.htm http://www.soundofmusic.cc/principles_and_techniques.htm
http://www.immediasound.com/Speakersetup.html |
| This is not science... | Tom Bombadil
Dec 13, 2002 11:47 AM | | but am thinking that a kick drum has a very rapid transient kind of waveform. Thus am thinking that the room does not have much to do with the way a kick drum will sound - played-back on a sub. It is **almost** all the work of the sub.
1. Considering that the PW<<whatever>> is not the Highest-End sub, it should still reproduce the kick drum at decent Volume levels (are your volume levels indecent ?)
2. Is the Sub placed on some higly mobile platform (loose floorboards) that want to "contribute" some unwanted vibrations to make your sound less "tight"
3. Is your listening position too far away ?
4. Do you have a faulty amp ? Kicked in Driver ? Tried another (but identical) sub ?
5. Could it be flappy sounds coming from Main Speakers that are not Hi-passed so that they "contribute" flappy sounds instead of the said kick drum ?
6. Is this just the way Ported Subs behave ? They do not get Damped enough ? Perhaps you're a drummer yourself and you are rather picky about how **exact** it should sound ? Does the Sub play Pipe Organ stuff pretty good ? |
| I'll try to explain it with a quick lesson in sound waves.... | _Luke_
Dec 13, 2002 11:51 AM | | Think about a wave pictorally (is that a word?). There's a straight line and that's your baseline. The wave is an arc first above that line then below that line and it comes back to that straight line (if you've ever heard of a sine wave, that's the picture I'm trying for in your mind). That's one cycle of the wave. For the higher frequencies, that happens very quickly. For the lower frequncies, it's alot slower, so the wave is very long, in some cases longer than the dimensions of your room - these things can get up to 50+ feet.
When that low frequency is generated by your sub, the wave comes out and bounces off a wall. It comes back and intercepts a new wave coming out of the sub (sometimes even the same wave still being generated). If it intercepts another wave of the same frequency on it's up part (above that straight line) then you add the loudness together and that frequency is louder than it normally would be. If it intercepts that same frequency on it's downturn in the cycle, then it cancels out and you hear less of that frequency than you should.
That's why bass sounds funky sometimes. You'll be listening and all of a sudden a bass tone really sticks out. That is the wave meeting another and raising the amplitude so it sounds louder. Nulls, or areas where the waves are cancelled are harder to detect by ear I've found.
Bass traps and/or a parametric equalizer will help your situation. That's for another post.
Perhaps it's all gibberish right now and the Christmas Cheer I've consumed this after may confuse matters, but the only way you will understand what is happening is to understand sound waves and how to control them other than with the volume knob. Once you've done that, it really is a matter of using the right tools to temper them. |
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