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Thread: Hey Jonathan? |
    
Gold Member Username: James1115
Wilton,
Ct
Post Number: 4496
Registered: Dec-04
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| Posted on Wednesday, December 28, 2005 - 11:42 pm: |
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I was seriously debating going with a IDmax 12 in my new system in my truck over the ava 12 I was planning on running. I am going to be removing the center seat up front and building an enclosure with a 12 downfiring and ported firing toward the dash. I can get about 2-2.5cu ft. what do you think I should do size wise and tuned to? I am going to be running it either with my orion hcca 250g4 @ 1ohm 800 watts or my ppi a600 at 4ohms with 600. what do you think? |
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Relevant Product Info
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Gold Member Username: Jonathan_f
GA
USA
Post Number: 5243
Registered: May-04
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| Posted on Wednesday, December 28, 2005 - 11:49 pm: |
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1. 2.5 net tuned to 25hz
2. 2.25 tuned to 28hz
3. 2 net tuned to 30
Any smaller or higher tuned than that and I'd start thinking about sealed. It'll be kinda tough to fit it in a center console, but it's doable. |
Gold Member Username: James1115
Wilton,
Ct
Post Number: 4498
Registered: Dec-04
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| Posted on Thursday, December 29, 2005 - 12:08 am: |
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its a full middle seat its pretty big. Those dodge trucks have a wide seat. |
Silver Member Username: Mixneffect
Orangevale,
Ca.
USA
Post Number: 725
Registered: Apr-05
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| Posted on Thursday, December 29, 2005 - 12:19 am: |
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James,
I got almost the same numbers using BassBoxPro6;
VB=2.893 CF (blue) optimum size as per BBP6
FB=21.95 Hz
QL=6.591
F3=26.93 Hz
DV=4"
LV=21.26"
VB=2.5 CF (yellow)
FB=22.81 Hz
QL=6.591
F3=28.4 Hz
DV=3"
LV=12.23"
VB=2 CF (red)
FB=24.19 Hz
QL=6.591
F3=30.82 Hz
DV=3"
LV=13.93"
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Gold Member Username: James1115
Wilton,
Ct
Post Number: 4505
Registered: Dec-04
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| Posted on Thursday, December 29, 2005 - 11:36 pm: |
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hey guys thanks so much I did some final measuring, and I am going to go 2.0 tuned to 28. Thanks for the detail mix form that program what size port do I need at 2.0 tuned to 28? after displacement. |
Silver Member Username: Mixneffect
Orangevale,
Ca.
USA
Post Number: 729
Registered: Apr-05
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| Posted on Friday, December 30, 2005 - 02:18 am: |
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VB=2 CF (red).....= BOX SIZE
FB=24.19 Hz.......= PORT TUNING FREQUENCY
QL=6.591..........= BOX LEAKEAGE LOSSES
F3=30.82 Hz.......= FREQUENCY CUTOFF 3DB BELOW PAR
DV=3".............= PORT DIAMETER
LV=13.93".........= PORT LENGTH
2.0 cubic feet is the net volume. You must add for the port and driver displacement.
3" X 13.93" port displaces the volume by .0669 cubic feet. The driver displaces the volume by .12 cubic feet. So make the box 2.1869 cubic feet or 61.93 liters. |
Silver Member Username: Mixneffect
Orangevale,
Ca.
USA
Post Number: 730
Registered: Apr-05
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| Posted on Friday, December 30, 2005 - 02:34 am: |
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If you are looking for a total 2 cubic feet interior volume then consider this;
VB=1.809 CF* / 51.23 Liters
Total volume = 2 CF* / 56.63 Liters
FB=24.83 Hz
QL=6.591
F3=31.98 Hz
DV=3"
LV=14.76" |
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