bass speaker vents

[larrybassman]

Hi Guys, could anybody tell me what size vent (lenght, circular as I have some 4 inch piping available) would I need for a bass cab with 3.394 cu feet internal vol. I have a emminence legend cb 15 (15 inch speaker , 300watt) I use a 5 string bass and would like a punchy sound without too much boom. Would be gratefull of any help please

[bremen]

Edited again for misplaced decimal point!

According to winisd, you should get a decent response and power handling from a 100mm pipe 165mm long. That's tuned to 32Hz, so you've still got 300W power handling down to 30Hz.

Response is 3dB down at 70Hz and 11dB at 32Hz.

Power handling drops to 130W about 55Hz, mind, so it might fart out a little there. I don't think you can avoid that limitation with your chosen driver though.

Should be punchy enough. It won't boom if it's adequately braced.

Edited March 27, 2013 by bremen

[bremen]

Balcro has pointed out that when I said 16mm I actually meant 165...d'oh!

[RichardH]

I was going to say - sounds more like a hole than a port!