Speakers, Cross-over Networks etc.

Electronics Infoline Web

Loudspeaker Protection and Muting

http://sound.westhost.com/project33.htm

http://sound.westhost.com/project71.htm

http://www.epanorama.net/mirror/web-ee/Schematics/Active Subwoofer/SubWoof.htm

http://sound.westhost.com/project48.htm

http://www.web-ee.com/Schematics/Active%20Subwoofer/SubWoof.htm

RIAA phono preamplifier stages and active crossover networks.

http://www.national.com/an/AN/AN-346.pdf