cgregory4
09-17-2014, 01:49 PM
Two nice Jubals to possibly place into use. The crossovers are simple, and I want to evaluate and learn from them. However, I suppose my question could apply to any passive crossover.
If I isolate the mid-range components (easy to do on the Jubal board), how do I measure the impedance the 'source sees' at the speaker terminals -- for the mid-range path alone?
So, my test setup would include a frequency generator >> amp >> speaker terminals >> to crossover board (With everything disconnected, except the components in the mid-range path.) >> LE5-5 driver.
I don't know the 'window' the 5" driver is expected to operate within, but let's assume 300 cycles to 1300 cycles are crossover points.
I 'fire it up' and start at 300Hz, dial it up to 1300, and back down to 300, so I know the test setup is working well -- because I can hear it via the 5" driver.
NOW, to my question: If the signal generator is set at 1000 cycles per second, how do I determine the Impedance the source 'sees' -- At the speaker terminals?!
Obviously, the crossover is complex (ie non-resistive) so the Impedance would be different at another frequency, say 1100 Hz.
I have a signal generator, Fluke, scope, and a few other gadgets.
SO -- again -- Is there a 'poor boy' way I can measure the Impedance the source 'sees' at the speaker binding posts -- given the setup I've described?
Please don't respond, "Yes." or "No". or "Why?" ;)
Greg
If I isolate the mid-range components (easy to do on the Jubal board), how do I measure the impedance the 'source sees' at the speaker terminals -- for the mid-range path alone?
So, my test setup would include a frequency generator >> amp >> speaker terminals >> to crossover board (With everything disconnected, except the components in the mid-range path.) >> LE5-5 driver.
I don't know the 'window' the 5" driver is expected to operate within, but let's assume 300 cycles to 1300 cycles are crossover points.
I 'fire it up' and start at 300Hz, dial it up to 1300, and back down to 300, so I know the test setup is working well -- because I can hear it via the 5" driver.
NOW, to my question: If the signal generator is set at 1000 cycles per second, how do I determine the Impedance the source 'sees' -- At the speaker terminals?!
Obviously, the crossover is complex (ie non-resistive) so the Impedance would be different at another frequency, say 1100 Hz.
I have a signal generator, Fluke, scope, and a few other gadgets.
SO -- again -- Is there a 'poor boy' way I can measure the Impedance the source 'sees' at the speaker binding posts -- given the setup I've described?
Please don't respond, "Yes." or "No". or "Why?" ;)
Greg