Ultimate PW1550 Qtc=0.707


Driver parameters:
Qts=0.390
Fs=20.00 Hz
Vas=14.35 cu. ft
SPL=97.0 dB 1W 1m
max power=210 W RMS
Diameter=0.457 m
Xmax=0.013 m

Calculated parameters:
Vd=0.001436 m^3
n0=0.031623

Fc=36.26 Hz
F3=36.26 Hz
Vb=6.28 cu. ft
Par=1.512 acoustic W
Per=47.82 W

Thermal and Xmax limited SPL as a function of frequency:

Hz SPL thermal SPL xmax Power xmax
2.0 69.89 dB 63.46 dB 47.8 W
4.0 81.93 dB 75.50 dB 47.8 W
6.0 88.97 dB 82.55 dB 47.9 W
8.0 93.96 dB 87.54 dB 47.9 W
10.0 97.82 dB 91.42 dB 48.1 W
12.0 100.96 dB 94.59 dB 48.4 W
14.0 103.60 dB 97.27 dB 48.9 W
16.0 105.85 dB 99.59 dB 49.6 W
18.0 107.80 dB 101.63 dB 50.7 W
20.0 109.50 dB 103.46 dB 52.3 W
22.0 110.99 dB 105.12 dB 54.3 W
24.0 112.29 dB 106.63 dB 57.0 W
26.0 113.43 dB 108.02 dB 60.5 W
28.0 114.41 dB 109.31 dB 64.9 W
30.0 115.26 dB 110.51 dB 70.3 W
32.0 115.99 dB 111.63 dB 76.9 W
34.0 116.62 dB 112.68 dB 84.8 W
36.0 117.15 dB 113.67 dB 94.3 W
38.0 117.60 dB 114.61 dB 105.6 W
40.0 117.98 dB 115.50 dB 118.7 W
42.0 118.30 dB 116.35 dB 134.0 W
44.0 118.57 dB 117.16 dB 151.6 W
46.0 118.80 dB 117.93 dB 171.8 W
48.0 119.00 dB 118.67 dB 194.8 W
50.0 119.16 dB 119.38 dB 220.9 W
52.0 119.30 dB 120.06 dB 250.2 W
54.0 119.42 dB 120.72 dB 283.2 W
56.0 119.52 dB 121.35 dB 320.1 W
58.0 119.60 dB 121.96 dB 361.1 W
60.0 119.68 dB 122.55 dB 406.6 W
62.0 119.74 dB 123.12 dB 456.9 W
64.0 119.80 dB 123.67 dB 512.2 W
66.0 119.84 dB 124.20 dB 573.1 W
68.0 119.88 dB 124.72 dB 639.7 W
70.0 119.92 dB 125.22 dB 712.4 W
72.0 119.95 dB 125.71 dB 791.7 W
74.0 119.98 dB 126.19 dB 877.9 W
76.0 120.00 dB 126.65 dB 971.3 W
78.0 120.02 dB 127.10 dB 1072.4 W
80.0 120.04 dB 127.54 dB 1181.6 W
82.0 120.06 dB 127.97 dB 1299.3 W
84.0 120.07 dB 128.39 dB 1425.9 W
86.0 120.09 dB 128.80 dB 1561.9 W
88.0 120.10 dB 129.20 dB 1707.7 W
90.0 120.11 dB 129.59 dB 1863.8 W
92.0 120.12 dB 129.97 dB 2030.7 W
94.0 120.13 dB 130.35 dB 2208.8 W
96.0 120.13 dB 130.71 dB 2398.7 W
98.0 120.14 dB 131.07 dB 2600.8 W
100.0 120.15 dB 131.42 dB 2815.6 W




With this alignment the Ultimate PW1550 is Xmax limited up to 50 Hz and thermal limited past that.

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