Passive vs Active Crossovers

"The vast majority of loudspeaker manufactures prefer passive crossovers, usually second or third order except for very high end ones such as the first order VMPS or the now defunct Dunlavy, and the fourth order B&W 800's, or the Joseph Audio eighth order. Only a few, especially pro audio types use their own active crossovers with built-in amplifiers, thus imposing complete control over the sound of their loudspeakers."

"For horn enthusiasts, active crossovers are the ideal way to go as they allow us to use flea powered 2a3 or 300B amplifiers for their superb mid and high ranges and push pull tube or solid state for their bass. One gets the best of speed, transparency, control and drive by not putting passive components between the amplifiers and drivers." - Bill Gaw ( Enjoy the Music )

Bill Gaw: AA Chapter 43 Marchand Electronics XM-44 Active Crossover