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Altec-Lansing 604

Original Altec-Lansing 604

Altec-Lansing DUPLEX Speakers

Altec Lansing invented the first DUPLEX® Loudspeaker System in 1941 (some sources say 1943 - we're really not sure). Called the "601", it was of the field-coil type and included a small-format HF compression driver mounted to a 12" low frequency loudspeaker with a hole bored through the pole piece of the woofer which connected to a 2 x 3 multicellular horn. Thus began the famous DUPLEX® series of loudspeakers. In 1944, the first of the world-renown ALTEC "604" series of DUPLEX®Loudspeakers (left) was introduced. It utilized a new, permanent magnetic structure of Alnico V, had a 15" low frequency......

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Altec Stonehenge III

DIY Altec-Lansing Stonehenge III

Perhaps one or the other of you recalls that about two years ago I had two short posts, Björns Altec Stonehenge III replicas as well as the associated. He was lucky to have a beautiful NOS pair of Altec 604-8 G Duplex with AlNiCo magnets, together with related original turnout , which he summarily transplanted into a corresponding test cabinet made from OSB. So now, the adaptation of a corresponding to the original volume, visually far more sedate casing that (almost) without a parallel walls, meets the highest technical standards... Read more at 2A3 Maniac...

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Stevens Dream Altec 604 Loudspeaker

Stephæn’s Altec 604 Dream Speaker

Looking back, it's easy to comprehend why I'm a believer in the concept of thought as object - the notion that we bring into our lives that to which we give our attention. That's how I manifested many of the good things that I am fortunate to have this time 'round. But, sometimes I falter and forget that. I can be quick to immediately assume something is out of reach. That's exactly what happened last October when I learned that the speakers from the room I ranked best in show at RMAF 2005 were beyond my modest financial means. I......

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About Us

Great Plains Audio was born out of the Altec Lansing corporation in 1998. It carries forward the loudspeaker design and manufacturing tradition that began with Western Electric in the early 20th century. Great Plains Audio is the only place where the legendary Western Electric/Altec Lansing sound reproduction technologies live on.

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7127 Northwest Third St. Oklahoma City,
Oklahoma, USA, 73127