[Mike D]

Does anyone know the -3db points and polarity for the 3.3? 

Is there any difference between the IIIA and 3.3 panels? 

Thanks again

[Roger Gustavsson]

Here are the schematics:

3.3, http://www.integracoustics.com/MUG/MUG/tweaks/xover/3.3xover.html
IIIa, http://www.integracoustics.com/MUG/MUG/tweaks/stranger/MG-IIIa_Crossover.htm


Roger Gustavsson

[neolith]

The big difference in the IIIa and 3.3 was  a change in the ribbon. The ribbon on the IIIa is a tad shorter (the housing is 60" while the 3.3 is 60.5") and wider thus having a lower impedance. This required a 1 ohm resistor to bring the impedance up to 3.3 ohms. The ribbon in 3.3 is the same that is used in 3.7 and 20.7 and all the models in between. I believe the mid-bass panel is the same.