Hi A7 Owners/Tweakers,

Greetings from Sydney, Australia!

I have recently bought a pair of Altec A7's consisting of 825 cabinets with 515B woofers and 802D CD's in 511B horns. The xo's are original N800-D units.

The previous owner had the 511B mounted inside the A7 cabinet ala "Magnificents" with the bass flare on the ground. I have played around with the speakers in my room and prefer the speakers with the 511B mounted on top of the box and the bass horn sitting directly underneath it (what I call theatre or original style).

I would appreciate your kind advice in relation to the dimensions of a baseline port I could start off with to fill the void of where the 511B used to be inside the box?

My preference initially is for a rectangular vent. I read somewhere on the hostboard that GPA had recommended a 26" x 3.25" vent.

Could I have the slot closer to the bottom of the cabinet (as in closer to the floor) or stick to the conventional middle of board placement?

Any advice you can offer is appreciated.

Thanks!