my new 604 cabinets I'm building.

[cradeldorf]

~12 ft^3 with a 65"^2 vent x 3/4" tunes it to ~41 Hz, kind of high for a modern HIFI app unless a sub system is used.

GM

That's what the Altec bulletin suggested for the 604? I haven't cut the ports yet, if you got a better suggestion.