I plan to use an active crossover between the 2226 woofer and 2426/2370 horn. What would your compensation circuit look like if it didn't have to perform the crossover duties? I have your Four-Pi crossover document; do some of the values just go to zero, or is the circuit completely different?
Wayne Parham Messages: 18676 Registered: January 2001
Illuminati (33rd Degree)
See if you have the option to configure CD compensation in the active crossover, either by jumper or setup menu. If you can, use it instead of compensation in the passive circuit.
Wayne Parham Messages: 18676 Registered: January 2001
Illuminati (33rd Degree)
If your crossover has no options, then you'll have to provide your own EQ. The curve you want has a pretty simple shape, a flat shelf from the crossover point up to 4kHz and then rising response after that.
If you don't have an equalizer, you could use a series resistor and bypass cap in line at the preamp level. That will give you the rising response part of the curve. It won't provide the flat shelf from crossover up to 4kHz, but it is a simple circuit that would be better than no compensation at all.
Do you have the formulas for determining the series resistor and bypass [= parallel?] cap values? I seem to recall the the Loudspeaker Design Handbook had the formulas, but I no longer have a copy.
Wayne Parham Messages: 18676 Registered: January 2001
Illuminati (33rd Degree)
The series resistor will be dependant on load impedance. Bypass cap is found using the capacitive reactance formula, which is Xc = 1/2πFC. I'd say go with R=100kΩ and C=400pF. Go up and down doubling or halving values 'till you get where you want to be.
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