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811B D250P-8 : 2nd order x-over graphs ...







Been trying to come up with a decent sounding x-over for 811B Altec horn D250P-8 driver and MCM 55-1220 12" woofer.

The recommended x-over for the D250P-8 is 2nd order 1600Hz, so I used that and a 2nd order 500Hz crossover for the woofer.

I selected the crossover values based on the impedance at the x-over frequencies and used Zobels on the horn & woofer to get a flat impedance curve.

There is a compensation circuit and 12dB series padding resistor on the horn.

The speaker was measured at the listening position ear level.

Been listening to this for a few days and it sounds alright.

Subjectively better than my previous efforts.






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Topic - 811B D250P-8 : 2nd order x-over graphs ... - deathtube 667 10:02:49 07/27/14 (3)

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