Daily Box, Port Help
08-02-2007, 11:20 AM
#1
Guest
Posts: n/a
Daily Box, Port Help
so im building a box for my brothers TJ. Were putting a pair of 15's powered by an Orion 2500D at .5 ohm.
The Box is 9.76 cubes before any displacement.
For port its 22.5 inches tall and up to 8 inches wide.
my question is for any of you guys with a program or smarts that can figure out the port length needed to tune the box to 32 hz.
i have used the online calculators in the past and they always seem to tune wrong.
any help would be apreciated, thnx in advance.
The Box is 9.76 cubes before any displacement.
For port its 22.5 inches tall and up to 8 inches wide.
my question is for any of you guys with a program or smarts that can figure out the port length needed to tune the box to 32 hz.
i have used the online calculators in the past and they always seem to tune wrong.
any help would be apreciated, thnx in advance.
Last edited by Mat-Romain; 08-02-2007 at 11:32 AM.
08-02-2007, 02:46 PM
#2
50 Watt CAFz'r
Join Date: Oct 2006
Posts: 54
I gather you are talking about a slot port? Using the 22.5", if you apply a 4" width to the slot I come up with 14.4 inches for your port length. Using 6" width I get around 23.8" length. This is tuning to 32 hz. If you wanted to use the whole 8", I get around 33.5" length. Keep in mind this is also calculated without displacement in mind. What drivers are you putting in?
08-02-2007, 03:48 PM
#3
Guest
Posts: n/a
yea...thnx a lot, there fusion NV-SW15's, heres the specs:
Max Power Rating (Watts): 2500
RMS Power Rating (Watts): 1100
Coil Height (Hvc): 40
Compliance (Cms): 146.18
Cone Area (Sd): 77.93
D.C. Coil Resistance (Re): 0.88
Electrical Q (Qes): 0.552
Force Factor (Bl): 8.4
Free Air Resonance (Fs): 23.62
Frequency Response: 19Hz - 500Hz
Gap Height (Hag)(mm): 10
Impedance (Nominal): 1
Inductance (Le) (mH): 0.51
Linear Excurson (Xmax): 40
Mechanical Excursion (mm): 15
Mechanical Q (Qms): 6.17
Moving Mass (Mms):285.85
Sensitivity (dB) (1W/1M):87
Total Loudspeaker Q (Qts):0.506
VAS (L): 126.07
VAS (CuFt): 4.45
Magnet Structure (Oz): 308
Total Loudseaker Displacement (L): 12
Max Power Rating (Watts): 2500
RMS Power Rating (Watts): 1100
Coil Height (Hvc): 40
Compliance (Cms): 146.18
Cone Area (Sd): 77.93
D.C. Coil Resistance (Re): 0.88
Electrical Q (Qes): 0.552
Force Factor (Bl): 8.4
Free Air Resonance (Fs): 23.62
Frequency Response: 19Hz - 500Hz
Gap Height (Hag)(mm): 10
Impedance (Nominal): 1
Inductance (Le) (mH): 0.51
Linear Excurson (Xmax): 40
Mechanical Excursion (mm): 15
Mechanical Q (Qms): 6.17
Moving Mass (Mms):285.85
Sensitivity (dB) (1W/1M):87
Total Loudspeaker Q (Qts):0.506
VAS (L): 126.07
VAS (CuFt): 4.45
Magnet Structure (Oz): 308
Total Loudseaker Displacement (L): 12
08-02-2007, 04:18 PM
#4
50 Watt CAFz'r
Join Date: May 2007
Posts: 326
so you saying tj right ?
you may be runnig in to standing waves or other issues with a square box like that and large drivers in such a confined area, this also may cause port noise, i really would reconsider the setup before you spend all this time building something that probably wont perforem properly
im not saying you dumb and dont take it as a insult. just think bout where your putting that and really how its going to sound ! have a great day
you may be runnig in to standing waves or other issues with a square box like that and large drivers in such a confined area, this also may cause port noise, i really would reconsider the setup before you spend all this time building something that probably wont perforem properly
im not saying you dumb and dont take it as a insult. just think bout where your putting that and really how its going to sound ! have a great day
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