N-500-E

[shensc127]

I would be deeply appreciated if anyone can give me some information regarding N-500-E crossover. I only got info. of N-500-D, and it seems to be matched for 802.

[jmarkwart]

shensc127,
I'll email you a PDF of the schematic.
Jeff

[shensc127]

Dear Jeff, Million Thanks! [email protected]

[shensc127]

Jeff, I got the doc., Thanks! It seems to be crossed at 500Hz for 8ohms driver, but I would like to use for 288-16K which is 16ohms.

[rghinton]

Jeff, could you also send me a schematic of the N-500-E. Thank you, Reed

[jmarkwart]

shensc127,
A high pass filter formed by 4uf and 5.4mh has an F3 of 1083Hz, regardless of the impedance of the driver. With a 16 ohm load it has a fairly low Q of .43, meaning it is not peaked above F3 but flattened out somewhat. (A Butterworth has a Q of .707) An 8 ohm load in this circuit would have a very low Q (.21), so the filter was probably designed for 16 ohms.
For a woofer, the low pass filter of 5.4mH and 18.9uf has an F3 of 498Hz with a Q of .95 using a 16 ohm load.
Hope this helps,
Jeff

[shensc127]

Jeff, Thanks! Could you explain the definition of "F3"? I think that the crossover is for specific drivers. The high Q of .95 for woofer is good for bass, but I wonder that would be a greater the peak in response. With a 8ohms load it has a Q of .47 which is close to the Q of high pass. Is it possible to get more flat response at the crossover frequency?

[jmarkwart]

shensc127,
F3 is the frequency where the filter attenuates by 3dB.
Jeff

[shensc127]

Thanks!

[shensc127]

Thank a lot!