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Great Plains Audio
https://greatplainsaudio.com/wp-content/uploads/2016/06/417-8H_lfspkr_spec_sheet.pdf
The 417-8H has a continuous power rating of 100 watts and a frequency response from 60 to 8000 Hz. Its design provides high efficiency, high linearity, low distortion, wide range and optimum cone resonance. AL-TEC 1515 S. Manchester Ave., Anaheim, Calif. 92803 A DIVISION OF AL-TEC CORPORATION 417-8H
Incoming speaker - Great Plains Audio (Altec) 417-8H | The ...
https://www.thegearpage.net/board/index.php?threads/incoming-speaker-great-plains-audio-altec-417-8h.1915642/
The Altec 417-8H is a speaker that I've wanted to try for a very, very long time. After scouring fleabay and Reverb for clean, vintage specimens, I decided to get a brand new version made by Great Plains Audio. I plan to install it in an open back, 1 X 12 cabinet, and run it through my various Marshalls and my Germino Lead 55.
Home - Great Plains Audio
https://greatplainsaudio.com/
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.
Altec 417-8H | Marc's Gear Depot | Reverb
https://reverb.com/item/289413-altec-417-8h
This is a vintage Altec 417-8H (Carlos Santana- Video-------- (Go to 17:30). Altec was bought out long ago, the original employees who made this speaker worked a deal to do the warranty work on these if they could keep the original machines that made them. They're Called Great Plains Audio now.
Altec Great Plains 417-8H 2018 Alnico 12" Speaker | Jon's ...
https://reverb.com/item/14257299-altec-great-plains-417-8h-2018-alnico-12-speaker
Hello, For sale is a Great Plains/Altec 417-8H Alnico 8 ohm speaker. This speaker has under 10 hours of medium volume play on it in my home studio. I bought it several months ago from Great Plains. It has a few small circular marks, and one small paint chip on the black...
Products - Great Plains Audio
https://greatplainsaudio.com/products/
The Great Plains Audio Model N604-8A is a 12-dB/octave dual-section passive crossover network having a center frequency of 1,500 Hertz. It is designed specifically to provide smooth response from our Model 604-8H-III Loudspeaker throughout its bandwidth.
Altec Lansing Drivers, Loudspeakers ... - Great Plains Audio
https://greatplainsaudio.com/altec-lansing-library/altec-lansing-drivers-loudspeakers-horns/
Altec-Lansing 802D And 804A HF Compression Drivers. Altec-Lansing 807A And 808-8A HF Compression Drivers. Altec-Lansing 808-8B HF Compression Driver. Altec-Lansing MR902-16HF HF Compression Driver/Horn Assembly. Altec-Lansing 900-Series HF Compression Drivers. Altec-Lansing 909-8A HF Compression Driver.
Altec 418 Question - Music Electronics Forum
https://music-electronics-forum.com/forum/amplification/guitar-amps/vintage-amps/931679-altec-418-question
I have about a dozen, several different suffixes, and at least one variation on frame style. Heck I wasn't even aware of the 418 until you mentioned it. 15 inch, I expect they're up sized versions of the 417's. And I expect "25" is a typo. That all being said, I don't have much tech info on the Altecs. You might try inquiring at Great Plains Audio.
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