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I was always under the impression that active is having the ability to adjust crossover points, slopes, levels and so on using some sort of device, not a passive crossover. That device would also come before the amps. Bi-amp uses a passive crossover to set the crossover points and slopes and these are not adjustable.

But after looking at these definitions, you can be active and bi-amped? And an active crossover can be analog as long as it can be adjusted or does it not even need to be adjustable?

Active Crossover An analog or digital device performing high-pass, low-pass and bandpass functions ahead of power amplifiers driving the transducers in a loudspeaker.

Bi-Amplification Some speaker systems with multiple drivers do not contain a crossover network, and they require a separate amplifier for each frequency range. The bi-amplified system still requires an active or passive crossover network to send the proper frequency band to each amplifier and speaker, but it precedes the amplifier and speaker and does not handle the power amplifier output.

Bi-Amplification - The use of two amplifiers, one for the amplification of lower (bass) frequencies , and the other for higher (midrange and treble) frequencies. The audio signal from the head unit or pre-amplifier is passed through an electronic crossover and divided into two separated signals. These signals are sent to the respective amplifiers and their outputs are sent to the respective speakers.(bass to woofers, midrange and treble to mids and tweeters through the use of passive crossovers) Tri-Amp is the use of three amplifiers in the same manner with the audio signal divided into three separate bands of frequency by the electronic crossover and so on.
 

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Active places the (electronic) crossover between the source and the amplifier (or within one of them), and has one amplifier channel per speaker.

Passive uses a passive crossover between the amplifier and speaker.

A biamplified setup can be crossed over actively or passively.
 
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