Can someone else run the calcs on this driver (Scanspeak 18W/8531) using a 28.5l vented box? I want to use PE boxes of either .999 ft³ (28.29l), or 1.010 ft³ (28.6l). I'm getting the feeling that these results are off.
Here's what I get using 28.5l:
Design by Vb, Fb and Q
Physical Vb 28.5 l
Absorption, Qa 80
Leakage, Ql 15
Port, Qp 80
Alpha, a 2.035
Vb 29.0 l
Fb 40.28 Hz
F3 38.02 Hz
Response peak 2.89 dB
Peak at 58.08 Hz
Port min dia. 6.82 cm
Port length 43.01 cm
Port 1. resonance 358 Hz
The parameters I used for the driver are:
Fs 28.50 Hz
Re 5.80 Ohm
Qms 5.10
Qes 0.39
Sd 150.0 cm2
Vas 59.0 l
Xmax peak 6.50 mm
(Le) 0.35 mH
(Le2) 0.00 mH
(Re2) 0.00 Ohm
Nominal Power 70.0 W
Here's what I get using 28.5l:
Design by Vb, Fb and Q
Physical Vb 28.5 l
Absorption, Qa 80
Leakage, Ql 15
Port, Qp 80
Alpha, a 2.035
Vb 29.0 l
Fb 40.28 Hz
F3 38.02 Hz
Response peak 2.89 dB
Peak at 58.08 Hz
Port min dia. 6.82 cm
Port length 43.01 cm
Port 1. resonance 358 Hz
The parameters I used for the driver are:
Fs 28.50 Hz
Re 5.80 Ohm
Qms 5.10
Qes 0.39
Sd 150.0 cm2
Vas 59.0 l
Xmax peak 6.50 mm
(Le) 0.35 mH
(Le2) 0.00 mH
(Re2) 0.00 Ohm
Nominal Power 70.0 W
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