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Old 15th November 2005, 06:11 PM   #1
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Question Question about a speaker HELP

Hello 2 all you guys
First, sorry for my bad english
Have you heard about SAL speakers? Their home page is
www.sal.hu
Well, I got 2 of their speakers SBX1620 and I want to make a 2 way bass-reflex speaker box. I have used WinISD Pro, but I'm unsure about box volume and port. I will use it with my little stereo LM1875 amp 2x 25W, which, also has an variable high pass butterworth filter 20-100Hz, 12db/oct. My goal is f3 to be something like 50-60Hz. Here is the data about the driver SBX1620:

Music power : 80W
Power rating : 50W
Impedance : 8 ohm
SPL (1W/1m) : 86,6db
Voice coil former : Aluminium
Cone : Kevlar
Magnet weight : 20oz
DC resistance : 7,4 ohm
Eff. cone area : 136,8 cm^2
Cone Diameter : 13,2 cm
Speaker diameter : 16,7 cm
Free air resonance : 44,07 Hz
Qms :4,46
Qes : 0,675
Qts : 0,586
VAS : 20,97 L
Moving mass Mms : 16,51g
Mech. resistance Rms : 1,11 kg/s
Suspension compl. Cms : 0,79 mm/N
Force faktor BxL : 7,08 Tm
Voice coil inductance : 1,55mH

Maximum linear excursion : Not given

Is this speaker worth of anything, according to thata given? If yes, then what values you would chose for Vb and Fb?

Any suggestions?...

Thank you in advance
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Old 15th November 2005, 06:15 PM   #2
Did it Himself
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Location: Gloucestershire, England, UK
Qts is quite high so would be suited to a sealed box. But you might be able to use a QB5 alignment as your amp has a high-pass filter, which might be good. See sound.au.com articles section for more info on using this alignment. You may find help on the forum there as well.
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