N-500-E

Jeff,
Could you also send me a copy of the N-500-E xover? I would like to see exactly what you are refering to in these posts. Are your results actual measured or simulated?
Thank you,
Richard C.

rchristianson_at_mindspring_dot_com

Jeff, Many thanks. Reed

Richard,

The PDF is on the way!

My results were calculated. I used a TI handheld and calculated the resonance of a second order filter, and the Q of a second order LC circuit, using the N500E values.

Jeff

Hi All,

I created a bit of confusion with my post about F3 above. I should have said that it's a filter's resonant frequency, (product of L and C), not F3, that remains the same at differing load impedances. It's the Q, or shape of the "knee" of the rolloff response, that changes with load impedance. While a filter's resonant frequency designates its crossover frequency, differing Qs definitely affect at what frequency the filter attenuates by 3dB. Most symmetrical audio filters lie in the Q range of .5 (Linkwitz-Riley) to .707 (Butterworth), and their combined power and frequency responses are well documented. BTW, Q is easy to calculate: Q= [(R?C)/L]?

Sorry for the confusion.

Jeff

Jeff, Do you have a schematic of the Altec N-800F crossover? If so, could you email it to me? Thank you. Reed

Reed,

Sure don't. Send me a copy if you find one.

Jeff

Hi,
I lost the schematic for the Altec N-500E. Could anybody send it to me? Thank you. [email protected]