Altec 604e. Altec 604E Photo 4129674 US Audio Mart A hybrid speaker unit used in recording studios around the world. In my 9 cubic feet cabinet it doesn't go deeper than 40hz.
Altec 604e Photo 3842567 US Audio Mart from www.usaudiomart.com
"That the 604E can produce any high frequencies at all is down to the fact that it's a dual-coaxial driver—or, as Altec described it, a Duplex: each 604E comprises one 15" woofer and one horn-loaded compression driver with a 2.25" aluminum diaphragm, both with their own edge-wound voice-coils (copper for the woofer, aluminum for the. Probably cost me about $100-$150 in parts, and about about 4 hours of time to build and install them.
Altec 604e Photo 3842567 US Audio Mart
My 604 is very easy to drive and sound is very dynamic without feeling of any compression "That the 604E can produce any high frequencies at all is down to the fact that it's a dual-coaxial driver—or, as Altec described it, a Duplex: each 604E comprises one 15" woofer and one horn-loaded compression driver with a 2.25" aluminum diaphragm, both with their own edge-wound voice-coils (copper for the woofer, aluminum for the. Footnote 1: Great Plains Audio, whose staff includes a number of former Altec employees, also manufactures their own modern version of the 604, which they call the 604E Series II
Vintage Altec 604e SUPER DUPLEX Speakers with Altec N1500 CROSOVERS IN. Footnote 1: Great Plains Audio, whose staff includes a number of former Altec employees, also manufactures their own modern version of the 604, which they call the 604E Series II The 605 was 3 dB less efficient due to it's smaller magnetic structures
Altec 604E with 859A => beautiful speakers Photo 4558666 US. It seems Altec tried to phase out 604 production with the introduction of the 605 In other words, it made a little more bass, and a little more.