audiofanaticz Posted September 15, 2018 Report Share Posted September 15, 2018 Ok so looks like my guess were pretty close then being tuned to 33 you should be able to play down to 25hz or so with a decently built enclosure. Low pass filter at 40hz is a bit too low, usually 60-70hz is ideal for those, otherwise your loosing out on a lot of higher frequencies that is left for your midrange to pick up the slack on if they can. Granted it being set that low wont hinder playing lower than what its set too, the LPF just filters out frequencies above its setting. What does your woofer do when your trying to play lower, like how does it act? Link to comment Share on other sites More sharing options...
Matthew Williams Posted September 15, 2018 Author Report Share Posted September 15, 2018 I will fix it in the morning. It acts as though it is trying to play low but it sounds horrible. Like it will basically just move around before actually hitting some decent sound. Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted September 15, 2018 Report Share Posted September 15, 2018 1 hour ago, Matthew Williams said: ...Like it will basically just move around before actually hitting some decent sound. What you are describing sounds like you are trying to play too much below your tuning frequency and the sub is unloading. If you can, I'd suggest you verify your tuning frequency just to make sure its where you think it is. You can do this by playing sine wave tones a moderate volume. Watch/lightly feel the cone. You are looking for the frequency where cone movement is the least, it will almost stop. That frequency in your tuning frequency. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
JRsmoothee Posted September 15, 2018 Report Share Posted September 15, 2018 dont listen to any advice from any of these idiots on this forum...they will only sway you to buy "smd" products or related vendors .... its all about $$$, and marketing to the "sheep" (dumb consumers that dont know anything about car audio) you've been warned, and im sure this post will be deleted and i will be banned....welcome to advertising politics Link to comment Share on other sites More sharing options...
Matthew Williams Posted September 15, 2018 Author Report Share Posted September 15, 2018 They haven't suggested it. besides I use some SMD products @JRsmoothee @Triticum Agricolam It hits the hardest usually up in the 37 - 45 area. Link to comment Share on other sites More sharing options...
Joe X Posted September 15, 2018 Report Share Posted September 15, 2018 3 hours ago, Matthew Williams said: I will fix it in the morning. It acts as though it is trying to play low but it sounds horrible. Like it will basically just move around before actually hitting some decent sound. Going by your specs: Double layer baffle External Height = 19 in External Width = 35 in External Depth = 24 in Port Width = 4 in Port Length = 18 in, Port Area = 90 square inches Fb = 37.8 Hz Vb = 6.1 ft^3 Looking at that high tuning that would be enough to explain your problems. So your port is really about 18L? in that case your port doesn't turn. check that please. Link to comment Share on other sites More sharing options...
Matthew Williams Posted September 15, 2018 Author Report Share Posted September 15, 2018 1 hour ago, Joe X said: Going by your specs: Double layer baffle External Height = 19 in External Width = 35 in External Depth = 24 in Port Width = 4 in Port Length = 18 in, Port Area = 90 square inches Fb = 37.8 Hz Vb = 6.1 ft^3 Looking at that high tuning that would be enough to explain your problems. So your port is really about 18L? in that case your port doesn't turn. check that please. Port turns on the inside. Link to comment Share on other sites More sharing options...
Joe X Posted September 15, 2018 Report Share Posted September 15, 2018 So your port is longer that 18L then, if you can measure the length of the port after it turns and it's about 13 1/2" then you are tuned to 33Hz and your net volume would be 5.2 net. From there you can test building an external port extension to lower tuning and see if that helps. Link to comment Share on other sites More sharing options...
Matthew Williams Posted September 15, 2018 Author Report Share Posted September 15, 2018 Hold on. i need to go downstairs and check again. I believe i measured the area the box could work in. not the box itself. however, the port measurements I know are correct Link to comment Share on other sites More sharing options...
Matthew Williams Posted September 15, 2018 Author Report Share Posted September 15, 2018 yeah I was off. Box dimensions are 33L x 19W x 19H Link to comment Share on other sites More sharing options...
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