My preference is for the tapered transmission line. I think the tapered line does a better job of dampening out higher harmonics than a straight line. TLs do give bass extension over an air suspension design. As I mentioned TLs handle transients better than bass port. They do generate harmonics of the tuning frequency but these can be delt with by locating the driver about 1/3 of the way along the line and using lots of acoustic insulation in the first 1/2 to 2/3 of the line.
To me it’s the clean tight bass response and low distortion that make TLs attractive. Definitely worth the extra effort of designing and building. In a 2 way design TLs also deliver nice clean mid range by damping out unwanted harmonics and internal reflections that can interfere with the sound produced. Check out Martin Kings DIY Transmission Line Facebook group.
2-way, ML-TL (it is all about trade-offs) and an aperiodic midTL.
Unfortunately FaceBook. makes Martin’s group unreachable.
dave
Unfortunately FaceBook. makes Martin’s group unreachable.
dave