Altec 604E with 859A => beautiful speakers Photo 4558666 US

Altec 604e. Altec 604E Duplex in Barzilay Photo 3188770 US Audio Mart The 605 was 3 dB less efficient due to it's smaller magnetic structures A hybrid speaker unit used in recording studios around the world.

I've rebuilt the crossovers for mine using a Jeff Markwart design for the 604E that is essentially an Altec N-1500A with an added MF EQ section My 604 is very easy to drive and sound is very dynamic without feeling of any compression

Altec 604E pair speaker original crossover complete vintage KARLSOPNS

The 605 was 3 dB less efficient due to it's smaller magnetic structures I've rebuilt the crossovers for mine using a Jeff Markwart design for the 604E that is essentially an Altec N-1500A with an added MF EQ section I have a pair of 604-8G's that I bought new in 1978 and have used them for home use every day since

ALTEC 604E Super Duplex Coaxial Speakers w/ Original Box NOS YouTube. Listening to the Altec 604e, one of the first things one notices - same as the Altec Valencia 846b and the Altec A5x VOTT (which like the 604, are highly sought after by collectors) - is the realistic scale of the presentation, and how effortless and lifelike the upper and upper-middle frequencies are portrayed Now, Altec has incorporated two decades of experience and progress with the most recent research advances, the newest engineering developments, and the latest laboratory refinements to produce a contemporary PLAYBACK version of those famous 604-type speakers: The Altec Super Duplex 604E.

Altec 604E series 2 made by Great Plains Audio pair in Photo. A hybrid speaker unit used in recording studios around the world. Hence the special order 604D for professional users who required the efficiency.