I am about to build a midbass PA horn - the intended frequency rande is about 150-500 Hz and have two rather exotic 15" drivers from Meyer Sound. Had not seen anything like this - see T/S parameters:
Diameter 15"
Fs 142 Hz
Re 3,06 ohm
Res 4,23 ohm
Qms 0,87
Qes 0,63
Qts 0,37
L1 0,31 mH
L2 1,06 mH
RMSE-free 0,41 Ohm
RMSE-load 0,2 ohm
Vas 11,94
Mms 107,55 g
Cms 12 um/N
BL 21,57 T-m
Splref 99,2 dB
Sd 855 cm2
The throat area according to the formula at the
Single Driver website result in some 115 cm2 which feels rather small to the 850 cm2 Sd - What do you think?
The final enclosure will be pretty huge - 102 cm (W) x 51 cm (H) front area since two midtop turbosound enclosures will be sitting atop this one. Another question stems here - the mouth area corresponding to the 150 Hz Cutoff is pretty large - half size horn would need (again according to the formula on the abovementioned page) to be some 2 m2 whereas I only have about 0,5 m2 available
Diameter 15"
Fs 142 Hz
Re 3,06 ohm
Res 4,23 ohm
Qms 0,87
Qes 0,63
Qts 0,37
L1 0,31 mH
L2 1,06 mH
RMSE-free 0,41 Ohm
RMSE-load 0,2 ohm
Vas 11,94
Mms 107,55 g
Cms 12 um/N
BL 21,57 T-m
Splref 99,2 dB
Sd 855 cm2
The throat area according to the formula at the
Single Driver website result in some 115 cm2 which feels rather small to the 850 cm2 Sd - What do you think?
The final enclosure will be pretty huge - 102 cm (W) x 51 cm (H) front area since two midtop turbosound enclosures will be sitting atop this one. Another question stems here - the mouth area corresponding to the 150 Hz Cutoff is pretty large - half size horn would need (again according to the formula on the abovementioned page) to be some 2 m2 whereas I only have about 0,5 m2 available