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Multi-Way Conventional loudspeakers with crossovers

Question about a speaker HELP
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Old 15th November 2005, 07:11 PM   #1
Little.AMP is offline Little.AMP  Yugoslavia
diyAudio Member
Join Date: Oct 2005
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
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, 07:15 PM   #2
richie00boy is offline richie00boy  United Kingdom
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Join Date: Nov 2003
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.
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, modules and more.
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