Great Plains Audio designs and manufactures some of the finest loudspeakers in the world. We continue this tradition of excellence with the release of our newest loudspeaker, the Great Plains Audio Model 212-8A. The extension of usable lower frequency limits … Continue reading →
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 … Continue reading →
The Allsonics Allure loudspeaker system uses Great Plains Audio compression drivers and low frequency transducers. They are $4,950/pair. The matching Momentum sub-woofers also use our our famous 416. Read the Part-Time Audiophile review of the Allure loudspeaker system. … Continue reading →
Serious Stereo’s Serious Stereo Speaker uses our world famous Great Plains Audio 604-8H III Duplex. They sell for $13,750/pair. Read the Six Moons review of this amazing loudspeaker. … Continue reading →
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 →
Enter the H Model… In early 2004 I acquired a pair of 604-8Hs, the last ALNICO magnet duplex model Altec produced before they switched to ferrite magnets. It was also the first Altec duplex model that combined the Tangerine phase plug with a … Continue reading →
