Re: Transmission line: flared?
Im curious about this. I just built one for my 12" TC-9 tuned to the Fs at 27hz. With only 600 watts its a beast compared to the 10" type R in a tuned box that the T-Line replaced. This thing shakes the hell out of my truck, something my last setup never did. I have the feeling though that its tuned to low and have bottomed out the sub twice when it drops to the really deep notes and I had to back off the volume to stop it. Would raising the tuning be a good option to stop this from happening? Im guessing I would have to build another box but was also wondering if I could just close down the exit of the port a bit to change the tuning. The last bend to the opening is 21" long from the bottom to the top of the box.
The single biggest misconception involving a TL is that it must be "tuned" to the Fs of the driver.
Im pretty happy with the outcome but wondering if I could make it sound even better.
Alpine 9856 head unit
Alpine SPS-17C2 6.5 coaxial front doors
Polk Audio db 651 6.5 coaxial rear doors
Alpine Type-R 10" D4 sub in custom ported enclosure
Alpine MRD M605 amplifier
Refs: Assman (purchase), PsychoTheRapist (purchase), wasted ink (trade)