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Multi-Way Conventional loudspeakers with crossovers

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Old 10th April 2003, 05:53 AM   #1
jleaman is offline jleaman  Belgium
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Default Small 8" HElP

can any one help me with building a box with these paramiters. They are 8" im thinking about buying 3 more and useing 2 per box. But for now i would like to have a ported box NOT sealed. i have it in a box now but is not the recomended one. can any one help me get the right size ported..

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Serie X
Model 848 X
Diameter size in inches 8
Diameter size in centimeters 20.32
Z - Nominal Impedance in Ohms 4
Fs = Free air resonance frequesncy in Hz 62.5
Qts = Total Q Factor of driver 0.48
Vas = Equivalent acoustic volume in cubic feet 0.3
Vas = Equivalent acoustic volume in liters 8.46
Xmax = peak linear displacement of cone in inches 0.17
Xmax = peak linear displacement of cone in mm 4.32
Pe = Max power in watts 350
Ref = Driver's SPL 1W at 1m in dB 88.5
SPL = The half-space ref Efficiency 88.3
Voice Coil Diameter in inches 2
Mounting Depth in inches 3.5
Sd = Piston Area in sq m 0.018
BL = T*M Flux Density, Length Product 10.61
no = The half-space ref effciency 0.0001
Cms = Mechanical suspen Compliance 176.482
Mms = Mech mass of cone & free air load 36.707
Qms = Mechanical Q factor of driver 7.225
Qes = Electrical Q factor of driver 0.4609
Revc = DC Voice coil resistance in Ohms 3.6
Zmax = imped At top of resonance curve in Ohms 60.03
Fo = Free air resonance frequency in Hz 62.5
Magnet weight (oz) 48
Magnet weight (kg) 1.6879
Frequency response range tested from 20-2000 Hz 20-6200
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Old 10th April 2003, 04:02 PM   #2
jleaman is offline jleaman  Belgium
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I would really like some help as i have no speaker programs for mac..
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Old 11th April 2003, 12:10 AM   #3
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I'll run em when i get a spare moment.

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Old 11th April 2003, 05:31 AM   #4
navin is offline navin  India
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why ported. Qts 0.48. try TL. better still try push-push TL :-)
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Old 11th April 2003, 06:28 AM   #5
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Quote:
Originally posted by navin
why ported. Qts 0.48. try TL. better still try push-push TL :-)
Jeez... you sound like me Kool

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Old 11th April 2003, 06:52 AM   #6
jleaman is offline jleaman  Belgium
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because i have it ported now in a crap BOX actualy it is in a kenwood box with amp it is a tube thingy. IT POUNDS with out distorting and botteming out. I have always like ported.
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Old 11th April 2003, 06:59 AM   #7
jleaman is offline jleaman  Belgium
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Old 11th April 2003, 07:00 AM   #8
jleaman is offline jleaman  Belgium
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And i Power it with my N-channel witch WORKS WELL. it is nice. I have never seen a 8" do what i can do to this one.
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Old 11th April 2003, 07:02 AM   #9
jleaman is offline jleaman  Belgium
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And this is what the box looks like. It is Totaly not ment for a hi powered Sub.
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Old 12th April 2003, 06:31 AM   #10
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Not particularily suited to a reflex box.

0.53 ft^3 tuned to 50 hz (3" port, 12.1" long) gives a fairly flat FR but with a huge group delay.

Anything else with reasonably flat FR has equally ugly group delay.

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