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2. 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.

3. Bi-wiring - Wikipedia

   en.wikipedia.org/wiki/Bi-wiring

   Amplifier and loudspeaker with two elements and crossover networks. Top: normal connection. Bottom: bi-wiring. Loudspeaker bi-wired using banana plugs. Bi-wiring is a means of connecting a loudspeaker to an audio amplifier, primarily used in hi-fi systems. Normally, there is one pair of connectors on a loudspeaker and a single cable (two ...

4. Subwoofer - Wikipedia

   en.wikipedia.org/wiki/Subwoofer

   From about 1900 to the 1950s, the "lowest frequency in practical use" in recordings, broadcasting and music playback was 100 Hz. [9] When sound was developed for motion pictures, the basic RCA sound system was a single 8-inch (20 cm) speaker mounted in straight horn, an approach which was deemed unsatisfactory by Hollywood decisionmakers, who hired Western Electric engineers to develop a ...

5. Linn Isobarik - Wikipedia

   en.wikipedia.org/wiki/Linn_Isobarik

   1987 Cabinet: Crossover moved to compartment in bottom of speaker. SN. 5575/6; 1987 Sep Isobarik Sara 9 replaces Isobarik Sara; 1988 Crossover: New 4 ohm external crossover fitted in stand. Facility for tri-wiring. 1988 DMS discontinued – PMS can be driven passively (4 ohm) or actively. SN. 6701/2

6. Phonocar - Wikipedia

   en.wikipedia.org/wiki/Phonocar

   HIFI magazine test results reported that “ Phonocar’s amplifiers series OTTO are equipped with an X.O.T.-exit –crossover capable of forming complex multi-amplification chains. The mechanical construction is very accurate, with lateral protection-covers for cables and connectors. Remarkable performances reaching up to 1,000 Watt RMS”.

7. Audio crossover - Wikipedia

   en.wikipedia.org/wiki/Audio_crossover

   An N-way loudspeaker usually has an N-way crossover to divide the signal among the drivers. A 2-way crossover consists of a low-pass and a high-pass filter. A 3-way crossover is constructed as a combination of low-pass, band-pass and high-pass filters (LPF, BPF and HPF respectively). The BPF section is in turn a combination of HPF and LPF ...