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Great Plains Audio 604-8H III Rev. 2 Duplex - Great Plains ...
https://greatplainsaudio.com/featured-gpa-products/great-plains-audio-604-8h-iii-rev-2-duplex/
The Great Plains Audio 604-8H III Rev. 2 is more than just an evolution in the classic series of 604 Duplexes, it’s an AUDIO REVELATION! For more than fifty years, there has been one studio monitor loudspeaker that has been the defacto standard by which all others have been measured.
Great Plains Audio 604-8H-III - Great Plains Audio
https://greatplainsaudio.com/gpa-vintage-altec-ezine/great-plains-audio-604-8h-iii/
The Great Plains Audio 604-8H-III is a much improved version of the vintage ferrite magnet Altec 604 family, and is currently in production. Compared to the early production ferrite Altec 604-16X discussed elsewhere in these pages, the GPA 604 exhibits very smooth and extended response.
604E Series II LOUDSPEAKER - Great Plains Audio
http://greatplainsaudio.com/wp-content/uploads/2020/604E/604E_Series_II.pdf
the best sounding 604 ever, the Great Plains Audio model 604E Series II. Also recommended is our op The most famous broadcast studio and recording studio monitors in the world are probably 604-based speaker systems. During the 1970’s, 604-based monitor systems were used by more studios than all other monitor systems combined. The 604,
Alec Lansing 604 Studio Monitors - Derek Spratt
http://www.derekspratt.com/HTML/Personal/Altec%20604%20Studio%20Monitors.html
Altec Lansing 604 Studio MonitorsGreat Plains Audio 604-8H-III drivers with Rick Craig Cross-overs (2016-2020) This pair of Altec Lansing/GPA 604-8H-III studio monitors was built with custom crossovers by Rick Craig, in stunning 9 cubic-foot maple plywood cabinets (54"H x 18"W x 20"D, approx 125lbs). >US$8000 invested to build these speakers in ...
6moons audio reviews: Stephæn's Altec 604 Dream Speaker
https://www.6moons.com/audioreviews/altec/dream_3.html
Dear Audio Friends, this note is about Stephæn and Pete's Great Plains Audio 604 speaker project. Sixteen-inch 604 duplex drivers mounted in bottom-vented enclosures of approximately 10 cubic feet volume (actually turned out about 9 cubic feet …
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