That's like asking if a bandpass is louder than a ported box -- you can't really answer it without knowing all the details. Transmission lines will not drop off like ported enclosures do below tuning and will usually have better low end extension (or be louder in the lowest frequencies). It may not peak as high on a meter though as that's not what they're meant to do.
thats what i already have it in, same port area and all, at 34ish
I think they're great, but I wouldn't use one if output was a huge concern...
i dunno hard to explain, me and others just feel it has more potential. it doesnt ever reach its mechanical limits in the box at over 3000rms before imp rise and we feel it should be louder at certain freqs not far below tuning like 32 31 33 we hear too much "sub" and not enough bass know what i mean
the biggest problem unless its a mass loaded tline/ chambered tline, whichever you want to call it, is an extremely reduced power handling.
Actually, the line will be loaded by the interior of the vehicle and power handling should not be reduced drastically.
I have done that but with a Beringer mic. I don't have the spreadsheet I made with them though as it was on my old hard drive that ate a ton of data. All the measurements were done with the windows up and sunroof open and the meter at the head rest. I did a 1.25 sealed enclosure (Qtc of .707), 2.2 @ 32hz, and a tline with a 1/4 wave tuning of 35hz. All of them have similar top end roll offs around 70hz. With the reference point being 50hz, the sealed box was -3dB around 30hz, the ported box was -3dB around 27hz, and the tline was -3dB at about 17hz. The sealed box was pretty flat in its passband with a few peaks of about 2dB around 40-45hz. The ported enclosure had peaks around 35-40hz of about 3dB and the transmission line is flat with a sharp -1dB dip at 30hz and a sharp +4dB peak at 22hz while 24hz was at 0dB and 20hz was also at 0dB.
