"TT" wrote in message ...
Hi

I'm building a 1x12" speaker cabinet to use with my guitar amp head. I
have all the thiele/small parameters for my speaker, and have used a
program called BandBox Pro to design the speaker cabinet. I have also used
a program called WinIsd to check and both programs give me similiar
results.

I already have built a 150 litre cabinet to use with my speaker. I want to
tune my bassreflex box to 65Hz. The program says that with my rear baffle
thickness of 18mm, and 2 flush ends (I'm using a hole in the rear baffle
for port) I need to make a hole 300mm in diameter, to tune the box to
65Hz.

The port would be larger in diameter than my speaker, which is 279mm. Will
this kind of design work?
The program says that if I use 4 ports, 100mm each is sufficient, will
this work either? Is there any difference?

Thanks for answers!

**If you use a bass guitar, then don't bother tuning much below 80Hz. For
lead/rhythm guitars, there is no need for any signal remotely that low. Use
a smaller box and tune higher.


--
Trevor Wilson
www.rageaudio.com.au