i'm trying to load the 830668 woofer in a TQWT enclosure. the project is for Tarkus 3way. However, when i use the calculator here,
mh-audio Tapered Quarter Wave Tube
the line length keeps coming up as 267cm, and folded that in half,i still get ridiculously long box.
is there any other calculators that i can go by? i want the line length to be around 100cm or less
mh-audio Tapered Quarter Wave Tube
the line length keeps coming up as 267cm, and folded that in half,i still get ridiculously long box.
is there any other calculators that i can go by? i want the line length to be around 100cm or less
don't forget the QW of TQWT stands for quarter wave or wavelength. that particular calculator is tuning the enclosure for the driver's FS.
"Line tuning is set to Fs of driver to critically damp it at that frequency."
your driver having a low 30hz-ish FS, makes sense on the line length.
a 100cm line length will raise tuning to the 70-80hz range, which isn't much of a subwoofer at all. If looking for a smaller line length, try simulating or calculating a TL or MLTL. Brian Steele has a great excel spreadsheet for MLTLs, and TLs can be designed with aggressive tapers to reduce line length
"Line tuning is set to Fs of driver to critically damp it at that frequency."
your driver having a low 30hz-ish FS, makes sense on the line length.
a 100cm line length will raise tuning to the 70-80hz range, which isn't much of a subwoofer at all. If looking for a smaller line length, try simulating or calculating a TL or MLTL. Brian Steele has a great excel spreadsheet for MLTLs, and TLs can be designed with aggressive tapers to reduce line length
Right, for easiest, yet most accurate overall is MJK's Classic TL design routine: http://www.quarter-wave.com/TLs/Alignment_Tables.pdf
Excel calculator: http://www.quarter-wave.com/TLs/Alignment_Tables_Calculator_3_3_09.xls
Note that the shortest practical path length is a Fp = Fs/Qts' TQWT, though net bulk will still need to be ~ huge for a given box efficiency regardless of its effective path length.
Qts' = Qts + any added series resistance: mh-audio.nl - Home
GM
Excel calculator: http://www.quarter-wave.com/TLs/Alignment_Tables_Calculator_3_3_09.xls
Note that the shortest practical path length is a Fp = Fs/Qts' TQWT, though net bulk will still need to be ~ huge for a given box efficiency regardless of its effective path length.
Qts' = Qts + any added series resistance: mh-audio.nl - Home
GM
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