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Mike, quick question, Whats the cutout for the 18?

Finishing off my cuts on my box atm :D

Im guessing its around 16.5 but want to be sure, thanks!
 

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Hi Mike, just wondering how u are finding your Subs, i have the same drivers and a Behr 2500 amp and would like to build your design, in hindesight is there anything u would do different? I am New to this site and live in Adelaide australia, would appreciate any advice u can give, BTW your subs look Fantastic I bet they sound even better.:T

Regards Jezza
 

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Discussion Starter #73
Hi Jezza and welcome!

I love them, they take a beating constantly and keep on going. The only thing I would do differently is not use the egg crate foam as it has been said it has no effect. Live and learn. The EP2500 doesn't have a hi-pass filter, you may have to add one if you push the subs hard and they bottom out.

How big of a room will the subs be in?
 

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Hi Mike,
thankyou for the headsup on the subs. I have ordered the MDF and will start my build next week when it arrives...very anxious..could u please post the port length u used as I want to order the Precision Ports also. I will look into high pass filter also.

Regards Jezza
 

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Hi Mike, just wondering if you could run your eye over my boxnotes report to see if it is all OK

Regards Jezza from downunder


Boxnotes report for project: 331 litre 15.bxn
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Finished size 965 mm wide 762 mm high 584 mm deep - Panel thickness 18 mm - Single Front Panel

Internal Volume: 369.6 litres Working Vol 337.3 litres Tune 16hz

Component volumes: Ports = 21.3 litres Bracing = 4.4 litres Driver = 6.5 litres Total = 32.2 litres


Cutting List
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Panel dimensions show finished size

Top panel 965 mm wide 566 mm deep

Front outer panel 965 mm wide 762 mm high

Front inner panel 929 mm wide 726 mm high

Left side panel 566 mm deep 744 mm high

Right side panel 566 mm deep 744 mm high

Rear panel 929 mm wide 726 mm high

Bottom panel 929 mm wide 566 mm deep

Shelf brace 939 mm wide 558 mm deep

Shelf brace includes 5 mm all round for rebating into 4 adjacent panels


Resonances
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(1) Port Resonance 220 hz

(2) Driver to bottom wall resonance 370 hz

(3) Box top to bottom resonance 236 hz

(4) Driver to top wall resonance 656 hz

(5) Driver to rear wall resonance 334 hz

(6) Box front to back resonance 313 hz

(7) Driver to side wall-1 resonance 362 hz

(8) Box side to side resonance 185 hz

(9) Driver to side wall-2 resonance 378 hz


Port details
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Number of ports: 3
Internal Diameter: 103 mm
Length: 780 mm
Wall Thickness: 3 mm


Driver details
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Driver size: 18 inch
Number of Drivers: 1

Location of acoustic centre
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Box front to mid-depth of cone: 52 mm
Box top to driver centre: 280 mm
Offset from vertical centreline: 10 mm


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Report generated at: 00:13:31 on 03-25-2010 from Boxnotes Version:3.1
 
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