New BassChat 8"Cab design

[djk]

1 minute ago, Phil Starr said:

Hi David, to keep the same tuning you only have to match the area of the round port and keep the same length. Those are the only two numbers that matter. I keep using the drainpipe because it's simpler for most people. if you can calculate pi r^2 that will be ok, but if you are forming a port then it would be better to make it slightly bigger to reduce potential wind noise in the port. I've had a look and something 8x5cm inside measurements and 11.4cm long would work. You can change the shape so long as you keep to 40cm^2 area

Phil, many thanks for the help, it's much appreciated.

 

As I said, for me as I have the ply and no drain pipe it might be simpler.

 

I've now loaded the driver into the cabinet as it is and at low volumes it sound great, although I only completed this today and have only had the chance to try it with my Ashdown Rootmaster 800 (at low volume). I'm ging to see how it sound with the TC Electronic amp later this week. Still waiting for the grill to arrive too.

 

I have a ruminate over which path to take regarding the port and let you know the results.

 

I really appreciate all the work and support you and the others involved in the development of the BC cabinets, thank you.

 

Regards

David

 

 

[Mottlefeeder]

37 minutes ago, Phil Starr said:

Hi David, to keep the same tuning you only have to match the area of the round port and keep the same length. Those are the only two numbers that matter. I keep using the drainpipe because it's simpler for most people. if you can calculate pi r^2 that will be ok, but if you are forming a port then it would be better to make it slightly bigger to reduce potential wind noise in the port. I've had a look and something 8x5cm inside measurements and 11.4cm long would work. You can change the shape so long as you keep to 40cm^2 area

Phil,

Just for my education: changing the port size changes the available internal volume of the cab - what sort of % change in cab volume would start to be audible / ring alarm bells for you?

(Another) David