JL 18W6 Qtc=0.707


Driver parameters:
Qts=0.384
Fs=20.00 Hz
Vas=9.00 cu. ft
SPL=88.9 dB 1W 1m
max power=500 W RMS
Diameter=0.457 m
Xmax=0.013 m

Calculated parameters:
Vd=0.001436 m^3
n0=0.004898

Fc=36.82 Hz
F3=36.83 Hz
Vb=3.77 cu. ft
Par=1.609 acoustic W
Per=328.53 W

Thermal and Xmax limited SPL as a function of frequency:

Hz SPL thermal SPL xmax Power xmax
2.0 65.29 dB 63.46 dB 328.5 W
4.0 77.33 dB 75.50 dB 328.6 W
6.0 84.37 dB 82.55 dB 328.8 W
8.0 89.36 dB 87.54 dB 329.3 W
10.0 93.22 dB 91.42 dB 330.3 W
12.0 96.36 dB 94.59 dB 332.3 W
14.0 99.00 dB 97.27 dB 335.4 W
16.0 101.26 dB 99.59 dB 340.3 W
18.0 103.21 dB 101.63 dB 347.3 W
20.0 104.92 dB 103.46 dB 357.2 W
22.0 106.42 dB 105.12 dB 370.5 W
24.0 107.73 dB 106.63 dB 387.9 W
26.0 108.88 dB 108.02 dB 410.3 W
28.0 109.88 dB 109.31 dB 438.5 W
30.0 110.74 dB 110.51 dB 473.4 W
32.0 111.49 dB 111.63 dB 516.1 W
34.0 112.13 dB 112.68 dB 567.5 W
36.0 112.68 dB 113.67 dB 628.9 W
38.0 113.14 dB 114.61 dB 701.3 W
40.0 113.54 dB 115.50 dB 786.2 W
42.0 113.87 dB 116.35 dB 884.8 W
44.0 114.16 dB 117.16 dB 998.6 W
46.0 114.39 dB 117.93 dB 1128.9 W
48.0 114.60 dB 118.67 dB 1277.4 W
50.0 114.77 dB 119.38 dB 1445.7 W
52.0 114.91 dB 120.06 dB 1635.4 W
54.0 115.04 dB 120.72 dB 1848.4 W
56.0 115.14 dB 121.35 dB 2086.3 W
58.0 115.23 dB 121.96 dB 2351.2 W
60.0 115.31 dB 122.55 dB 2644.9 W
62.0 115.38 dB 123.12 dB 2969.5 W
64.0 115.44 dB 123.67 dB 3327.1 W
66.0 115.49 dB 124.20 dB 3719.8 W
68.0 115.53 dB 124.72 dB 4149.9 W
70.0 115.57 dB 125.22 dB 4619.6 W
72.0 115.60 dB 125.71 dB 5131.4 W
74.0 115.63 dB 126.19 dB 5687.7 W
76.0 115.66 dB 126.65 dB 6290.9 W
78.0 115.68 dB 127.10 dB 6943.7 W
80.0 115.70 dB 127.54 dB 7648.6 W
82.0 115.72 dB 127.97 dB 8408.5 W
84.0 115.73 dB 128.39 dB 9226.1 W
86.0 115.75 dB 128.80 dB 10104.1 W
88.0 115.76 dB 129.20 dB 11045.7 W
90.0 115.77 dB 129.59 dB 12053.6 W
92.0 115.78 dB 129.97 dB 13131.1 W
94.0 115.79 dB 130.35 dB 14281.1 W
96.0 115.80 dB 130.71 dB 15506.9 W
98.0 115.80 dB 131.07 dB 16811.8 W
100.0 115.81 dB 131.42 dB 18199.1 W




With this alignment the JL 18W6 is barely Xmax limited up to 30 Hz and thermal limited past that.

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