Wayne Parham Messages: 18792 Registered: January 2001
Illuminati (33rd Degree)
I don't have a copy in the computer, but I'll try to locate the 1980 plans for the one π speakers that contained the JBL 2115J if you'd like. I'd be happy to scan the file and E-Mail it to you. The cabinet was aligned as per PiAlign, and so the cabinet is small - 0.66ft3 as I recall - and the port had to be mounted diagonally to fit in the box. For different applications, I also installed 2115's in 1ft3 and 2ft3 cabinets with good results. Each of these cabinets was tuned to approximately 45Hz.
Wayne Parham Messages: 18792 Registered: January 2001
Illuminati (33rd Degree)
Connect the 2405H using a second-order network having a 2.0uF cap in series and 0.5mH coil in shunt followed by an attenuator of 8 ohms in series and 4 ohms directly across the tweeter. For the 2115H, use a 0.5mH coil in series. If you run a 2115J, then use a 1.0mH coil instead.