Peter Chant wrote:

Just wondering if anyone has any experience. Given I have some days off
I might do this.

Have a couple of 4" bass units and a tweeter kicking around the garage
and the desire that _anything_ must be better as a centre speaker than a
horrid injection molded plastic speaker that came with the (oldish TV).

Probably making a vented enclosure. Is it better put the drivers in a
single enclosure or to make essentially two separate enclosures side by
side? Can't really think of any pros and cons except to do the sums and
see if the box sizes are realistic.

** Long as the 4 inch drivers are closely similar, using a common enclosure and one port is the way to go.

The Bose 802 ( pro audio version of the 901 ) used 8 x 4 inch drivers and two ports - not that it is any shining example of design.

Seriously, one large port IS better than two smaller ones - less losses and wind noise ie chuffing.

If you have the basic TS parameters for the drivers ( Vas,Fs and Qs) and pop them into WinISD Beta you can easily see how altering the box volume and port frequency changes things.



.... Phil