You head on over to the Audioheritage.org forum, and read till your eye's fall out. Read the treads, read the lit cut sheets and the makers engineering documents, those that have made it to the public domain.
Mostly JBL but some Altec. TAD, Westlake, JBL, ALTEC, Augspurger, REY and UREI shared a number of engineering staff and similar approaches.
If you ask before reading over at Audioheritage....expect to get flames.
In various threads the folks on that forum have deconstruced various pieces of the old large format monitors and reverse engineered them. Then you get hold of some speaker software and start crunching numbers.
Sorry, I don't think their are any shortcuts.
Cyclotronguy
Mostly JBL but some Altec. TAD, Westlake, JBL, ALTEC, Augspurger, REY and UREI shared a number of engineering staff and similar approaches.
If you ask before reading over at Audioheritage....expect to get flames.
In various threads the folks on that forum have deconstruced various pieces of the old large format monitors and reverse engineered them. Then you get hold of some speaker software and start crunching numbers.
Sorry, I don't think their are any shortcuts.
Cyclotronguy
You need a Crossover Network to be placed in the connection path between the power amplifier (channel) and the 4001 & 1603 driver pair. In the diagram provided by NP, the triangles (-s) need to be connected together to complete the circuit. It is a 3-port network, amplifier connected on the left and drivers connected on the right top & bottom. Do not connect the drivers directly to a power amplifier. As the nut said to the bolt: "not without a washer baby!",
Regards,
WHG
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