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Tag Archives: Review

Great Plains Audio 604-8H-III

Great Plains Audio Posted on July 25, 2017 by Jeff MarkwartJuly 25, 2017
GPA 604-8H-III-Rev-02

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 … Continue reading →

Posted in GPA's Vintage Altec E-Zine, Jeff Markwart's Corner | Tagged 604-8H III, Great Plains Audio, Review
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