TT wrote:
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!

TT



This is not how guitar speakers are designed. Reflex speakers are
generally poor guitar designs, which should be dropping fairly fast from
about 100Hz, and with some nice hefty peaks up at a few kHz. Go for a
fully sealed box if it is fairly big, or for a smaller cabinet, have
about half of the back panel open.

High fidelity and flat response are NOT what you need for this job.

d