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Audiosphere research Monitor 18L | Audiokarma Home …
https://audiokarma.org/forums/index.php?threads/audiosphere-research-monitor-18l.52003/
The Audiosphere 18L was built somewhere between 1982 and 1990 give or take. Built in Toronto region using 18" accordian edge woofers with a 60 oz magnet and two inch v.c. The woofers are enclosed in an air suspension enclosure and if I remember correctly, they had circuit breakers.
Steve's - Audiosphere Monitor 18-L dynamic speaker
http://www.audiocircuit.com/Home-Audio/Audiosphere/Monitor-18-L
The Audiosphere Monitor 18-L is a dynamic speaker. Bob (October 28, 2009): The Audiosphere 18L was built somewhere between 1982 and 1990 give or take. Built in Toronto region using 18" accordian edge woofers with a 60 oz magnet and two inch v.c. The woofers are enclosed in an air suspension enclosure and if I remember correctly, they had circuit breakers.
Audiosphere Research Monitor 18L Speakers For Sale ...
https://www.canuckaudiomart.com/details/649784227-audiosphere-research-monitor-18l-speakers/
In excellent condition for their age, a pair of Audiosphere Research Monitor 18L speakers. 18" woofers, two 5" mids and four 3 1/2" bullet tweeters. All drivers work and they are ready for audition. Grilles and cabinets are in very good condition.
Speaker audio sphere research monitor 18L test peak at ...
https://www.youtube.com/watch?v=_twYe1fX-74
Audiosphere research monitor 18 blk - 7 speaker 3 ways For ...
https://www.canuckaudiomart.com/details/649665970-audiosphere-research-monitor-18-blk-7-speaker-3-ways/
FOR SALE: AudioSphere Research speakers 18" woofer: Floor Standing Speakers: $250.00: ON Aug 26, 2021: 2 : DEALER AD: MONITOR AUDIO CT380-FX In-Ceiling Speaker: New-in-Box; Full Warranty; 60% Off; Free Ship: Hometheater Specific Speakers: $299.95: ON Aug 03, 2021: 3 : DEALER AD: Newform Research LineSource Monitor
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