Ian/Alan

I am a bit confused. Sounds like it's the new version that has three ports - but Alan thinks the picture is in error?

Anyhow, if the net internal volume available to the woofers has been increased then the port length would be decreased to achieve the same tuning. If so, the third port must be to increase the effective port diameter and lower the port air speed? But I've never had any chuffing problems with my two port version.

thanks