Quote Originally Posted by voice of theatr View Post
Wow--nice setup! It looks like they have Altec 421 woofers and 811b horns--what h.f. drivers and crossovers do they have? Is that a small port you've added between the horn and woofer/did you tune the cabs to a specific frequency?
The A7's were "Empty Arrival" lashups (installed K140's, 808's... no-X-over
(save for a single 20uf cap on hf horn......)

Cabinets were beat-up (30-40 yrs road rash) but they did have big casters, handles
and four one inch pipe collars bolted to the tops..probably hung @ one pt. or another.
There was "stack 6 - row j" on one cabinet .

Anyway tuning is what they got....EQ, test, EQ, listening test EQ test etc,,
10 to 20 Eq's Extended listening between tests 4 mo. worth at least....
After a while ..I started putting 'PET' names on the octaves
To make a long story short ...it finally toke 2 Eq's and 46db to get it.......