No matter if you use PLLXO, active or standard x-overs you still need to take the drivers response into the calculation.
You can´t just put together a 2nd order filter and expect it to give a decent result. With PLLXO you sidestep one problem but introduce one or several others.
I´d say, still, with no measurements, the active solutions is most likely to give decent results. It´s really not that difficult to learn about basic Volts, ohms and amps and how a basic PS and opamps works.
/Peter
You can´t just put together a 2nd order filter and expect it to give a decent result. With PLLXO you sidestep one problem but introduce one or several others.
I´d say, still, with no measurements, the active solutions is most likely to give decent results. It´s really not that difficult to learn about basic Volts, ohms and amps and how a basic PS and opamps works.
/Peter
I agree with Pan. Due to the nature of the interactions with passive, it's actually easier to go active and you are pretty much guaranteed to get good results. There really isn't anything more to an active design than a passive one, IMO. There's loads of utils, spreadsheets, charts and books around for designing active filters with op-amps.
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