JamesThompson
Agent
- Joined
- Nov 4, 2002
- Messages
- 44
Finally got around the creating a test tone disc and running some low freq sine waves through the new Tempest.
I have the budget Radio Shack SPL meter and I think I'm having some performance issues with my new sub. I had originally written it off as "bad room", but I'm not so sure now. I created the test tone disc as 5 sec tracks of sine waves starting at 90Hz, dropping 10Hz until 40Hz, then dropping 5Hz until 20Hz.
The wife is in the house, so I'm running the tests in the ~90db range from about a meter. I'm seeing a tremendous drop-off around 30-35Hz. This kind of fall-off can't be normal. :frowning:
I flipped the sub upside down, ran a couple tones and noticed the mother of all air leaks on the bottom panel. I took this opportunity to adjust the poly-fil away from my ports and caulk the bottom panel. I'll let the caulk dry tonight and give it a whirl tomorrow with my fingers crossed.
I broke out the multi-meter and made sure I saw 4 ohms at the speaker, and that checked out ok. I saw LOR:Two Towers the other day and all sounded well, but I've never had a sub of this size and don't really know what to expect.
Any ideas on why my sub seems to wimp out below 35Hz? Could jammed up ports and air leaks cause this type of behavior? Do I just need to crank up the amp gain?
TIA for any help. BTW, this board rocks!
- JamesT
I have the budget Radio Shack SPL meter and I think I'm having some performance issues with my new sub. I had originally written it off as "bad room", but I'm not so sure now. I created the test tone disc as 5 sec tracks of sine waves starting at 90Hz, dropping 10Hz until 40Hz, then dropping 5Hz until 20Hz.
The wife is in the house, so I'm running the tests in the ~90db range from about a meter. I'm seeing a tremendous drop-off around 30-35Hz. This kind of fall-off can't be normal. :frowning:
I flipped the sub upside down, ran a couple tones and noticed the mother of all air leaks on the bottom panel. I took this opportunity to adjust the poly-fil away from my ports and caulk the bottom panel. I'll let the caulk dry tonight and give it a whirl tomorrow with my fingers crossed.
I broke out the multi-meter and made sure I saw 4 ohms at the speaker, and that checked out ok. I saw LOR:Two Towers the other day and all sounded well, but I've never had a sub of this size and don't really know what to expect.
Any ideas on why my sub seems to wimp out below 35Hz? Could jammed up ports and air leaks cause this type of behavior? Do I just need to crank up the amp gain?
TIA for any help. BTW, this board rocks!
- JamesT