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2. Audio crossover - Wikipedia

   en.wikipedia.org/wiki/Audio_crossover

   Thus a 2-way active crossover needs two amplifiers—one for the woofer and one for the tweeter. This means that a loudspeaker system that is based on active crossovers will often cost more than a passive-crossover-based system. Despite the cost and complication disadvantages, active crossovers provide the following advantages over passive ones:

3. Bi-amping and tri-amping - Wikipedia

   en.wikipedia.org/wiki/Bi-amping_and_tri-amping

   Bi-amping - An active crossover with two amplifiers.. Bi-amping and tri-amping is the practice of using two or three audio amplifiers respectively to amplify different audio frequency ranges, with the amplified signals being routed to different speaker drivers, such as woofers, subwoofers and tweeters.

4. Subwoofer - Wikipedia

   en.wikipedia.org/wiki/Subwoofer

   In professional concert sound system design, subwoofers can be incorporated seamlessly with the main speakers into a stereo or mono full-range system by using an active crossover. The audio engineer typically adjusts the frequency point at which lower frequency sounds are routed to the subwoofer speaker(s), and mid-frequency and higher ...

5. Powered speakers - Wikipedia

   en.wikipedia.org/wiki/Powered_speakers

   The term "active speakers" can also refer to an integrated "active system" [5] in which passive loudspeakers are mated to an external system of multiple amplifiers fed by an active crossover. These active loudspeaker systems may be built for professional concert touring such as the pioneering JM-3 system designed in 1971 by Harry McCune Sound ...

6. Linn Isobarik - Wikipedia

   en.wikipedia.org/wiki/Linn_Isobarik

   [1] [16] The Linn/Naim triamped active system, using a LP12 source, Naim amplification and electronic crossovers together with the Isobarik PMS, was regarded as the pinnacle of "flat-earther" hi-fi systems, [9] [16] and the speaker is integral to the general aura of mysticism that went with the Linn/Naim equipment. [1]

7. No, photo doesn't show migrants leaving NYC before Trump ...

   www.aol.com/no-photo-doesnt-show-migrants...

   The claim: Photo shows migrants leaving NYC for Canada ahead of Trump presidency. A Nov. 14 Facebook post (direct link, archive link) includes an image showing several people stepping off a bus ...