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Old 20th November 2008, 05:49 AM   #1
c3conv is offline c3conv  Philippines
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Default choosing specs for driver that will be used for OB

is there such a thing as right specs for bass driver in an OB application?
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Old 20th November 2008, 04:56 PM   #2
Rudolf is offline Rudolf  Germany
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My personal list:
Sd and Xmax should be as big as you can afford (money- and WAF-wise). Next on the list is Qts, where every expert is pointing in another direction:
Linkwitz prefers low Qts, Kreskovsky something in the middle and King rather high Qts. Prior to other T/S parameters I would have a look at noise free operation at Xmax. Some drivers are quite noisy (chuffing pole vent, ringing basket) to their back side, which does not show in CB, but can be annoying in dipole operation.
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Old 21st November 2008, 01:09 AM   #3
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Re:'Linkwitz prefers low Qts, Kreskovsky something in the middle and King rather high Qts' - that's because they all use different eq methods, Linkwitz fully active, Martin King fully passive...
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Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency
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Old 21st November 2008, 07:28 AM   #4
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Default Re: choosing specs for driver that will be used for OB

Quote:
Originally posted by c3conv
is there such a thing as right specs for bass driver in an OB application?
Noise coming off the back side (like a vented pole piece) is important but missing from commercial spec sheets.
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