placing pllxo (Oris Horns)

by Bert , Sunday, September 24, 2006, 22:51 (6416 days ago) @ MichaelW

Hi Michael,

It doesn´t make a difference if I put the PLLXO between pre and active-crossover or between active crossover and amp, does it ?

Yes, it can make a difference. I do not know how you have connected everything together in your setup but some things come to mind. It will only work if your pre-amplifier has separated buffered outputs, having only one output connected to both the amplifiers/filters per channel then this will filter both the mid-high frequencies.

Even if you use an EQ filter (ie baffle step correction using a capacitor with resistor in series) connected in parallel with the output of the pre-amplifier then you will EQ the bass + the mid-high frequencies.

To be sure for proper operation, connect the 6dB filter or correction after the active filter for the bass. Only if these are true active filters! If these filters are based on passive components than these might disturb what you want to achieve due to impedance issues.

Note that the output impedance of the active filter (or pre-amplifier) has to be at least 10 times lower than the resistor you want to use for the filter.

Ciao,

Bert

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BD-Design - Only the Best!

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