New two-way ALtec horn design, questions

[atilsley]

Hi, I've only spent a little bit of time on this forum...but I appreciate the threads and knowledge of others.

I'm using stone horns from Stereolabs (Germany), 250Hz model crossed at 500Hz, plus a 1,000Hz tweeter horn crossed at 5,000hz. Drivers are two inch selenium and one inch respectively. Xover is Bob Crites unit for Klipsch.

Bass cabinet is 160 liter (5.6 cubic foot) in 25mm MDF, heavily braced and internal angled baffles, plus wool dampening on three sides. Ported to floor. Driver is 416-8C from GPA (should arrive next week).

Running two small tapped horns from 30Hz to about 60Hz. 300-watt O-Audio BASH amp.

Weston Acoustics (Melbourne) 300B "Time Machine" SET amp to drive the horns, plus a separate 100-watt pro-amp to drive the 416's.

Now, this multi way setup does sound good (even without the 416's installed)...but I want to change it to a full Altec "two way" system.

I want to run a GPA 902 one-inch driver into a horn (not yet decided)....and use the new GPA 1200 adjustable crossover. I'll keep the existing bass cabinets, and/or incorporate these into a new taller cabinet in order to house the horns. If I did this, I'd increase the cabinet volume to around 240 liters (8.5 cubic feet), which is better for the 416 to get down to a targeted 40Hz. I would use Euro birch ply (19mm) to build the 'outer' cabinet....and open up the top of the existing black cabinet.

I love the look of the Shindo design...and I could build that sort of cabinet. I previously built a Stonehenge V cabinet using a GPA 604 III, which sounded great.

I'd appreciate any thoughts/ideas on this.

Kind regards.

Andrew