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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 …
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.
Speaker audio sphere research monitor 18L test peak at ...
https://www.youtube.com/watch?v=_twYe1fX-74
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. If you know what these are, you know they sounded...
Audiosphere Research 18L Monitors "Monster Size and Sound ...
https://www.aussieaudiomart.com/details/50142-audiosphere_research_18l_monitors_monster_size_and_sound/
Classifieds: FOR SALE - Audiosphere Research 18L Monitors . Relisted, local purchaser who changed his mind due to the size of these, a monster pair of audiosphere research 18L Monitors, with 4 bullit horns, 2 5 1/4 midranges, and an 18 bass driver per cabinet (380 watts @ 8 ohms).
anyone used or heard of Audiosphere Research? Massive ...
https://www.avsforum.com/threads/anyone-used-or-heard-of-audiosphere-research-massive-speakers-with-18-woofers.816911/page-2
The output of the 18L's is 98db 1watt at 1 meter and the sound dymanics are 102 db. The sound dynamics have had thier 15" woofers blown out several times each and were replaced under warranty for 5years, never had any issues with the audiosphere's to this day.
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