JephD

I'm planning on making a new box for my truck. The box dimensions are 6" wide on the top, 8" wide on the bottom, 15" tall, and 51" long. I got 2 RE10's going in it. I ran this through WinISD and got these results. I got a vent mach of 0.08. How do they look? This is my first attempt at a ported box. Anyone have any suggestions?

Driver : RE 10
Vas : 75.6
Qts : 0.36
Fs : 21.50
SPL : 84.70
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Project by : Jeff
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Number of drivers : 2
Box type : Vented
Box size : 2.242 ft^3
Tuning frequency : 28.00 Hz
Vent : 2 vent(s)
14.04 in length for each
1.75 x 3.00 in rectangle


Relative
Freq Gain SPL
[Hz] [dB] [dB]
20.00 -12.70 75.01
25.00 -7.16 80.55
30.00 -3.30 84.41
35.00 -0.88 86.83
40.00 0.37 88.08
45.00 0.90 88.61
50.00 1.06 88.77
55.00 1.06 88.77
60.00 0.99 88.70
65.00 0.91 88.62
70.00 0.82 88.53
75.00 0.74 88.45
80.00 0.67 88.38
85.00 0.60 88.31
90.00 0.54 88.25
95.00 0.49 88.20
100.00 0.45 88.16
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Generated with WinISD[0.44] freeware (C) Juha Hartikainen
You can download your own copy from : http://www.linearteam.org

JephD

Anybody?
All I really want to know is if 2 1 3/4" x 3" x 14" ports will tune a 2.242ft^3 box to 28Hz. Any will I have any vent noise from 2 10" RE10's. Any help would be great because I really want to get started on this box.

JephD

Well I haven't had much luck planning this box. I am planning on building it this weekend but still need to get a few things worked out. It is going behind the seat in my regular cab truck. I decided inside of havinging two ports I want one big slot port in the middle of the box firing up. I was having trouble with the vent mach. What should be the maxmium amount that is acceptable? Another thing I didn't understand is when subtracting the port volume do I just subtract the volume of the wood or the volume inside the port too? I was planning on tuning it to 28hz. Is this alright for a daily system. If anyone could give me a hand it would really be apreachiated.

Starterwiz

Below mach .o6
Subtract the entire port volume.
Also subtract 1/2 the inside thickness of the port from the total length if you're using a wall of the box as a side of the port....better to tune a bit high to account for friction...
Keep the ends of the ports at least 4 1/2" away from any box walls as well...probly gonna need to bend em.
Two small ports have more friction than one large one, and need to be a bit shorter.

[ June 07, 2005, 05:30 AM: Message edited by: Car Trek ]