M
matheusgeyer
Audiophyte
What about Altec? The voice of the theatre and 604s? I know they are older than 50 years, but its good to mention.
Thanks I did some googling, and it was a strange beast. The main part of the crossover looked pretty much like the AR3a, but it had a 2500 uf capacitor stage, the purpose of which is a mystery to me.It had a total of 9 speakers: 1 ea 12" woofer, 4 ea 1-1/2" hemispherical-dome mid, and 4 ea 3/4" hemispherical-dome tweeters. The cabinet was 6-sided measuring 27" wide, 20" tall, and 9" deep. The back panel was 27" X 20" and
(guesstimating from here) side panels come forward 3" at right angles to the back. The remaining 3 panels were the baffles with the front at about 16" wide. Both side baffles dropped back from the front at about 30 degrees.
The woofer was definitely in the front panel, but I don't remember how the drivers were arranged among the 3 baffles.
There certainly are peaks and dips in the FR I posted, but HF declared them among the most linear speakers they had ever measured.
This speaker was sold primarily for pro use in studios and labs, but AR allowed their distributors to special order them.
Likely, it was ultimately a product of some mix of a modicum of technical prowess, trial and error, and dumb luck. I certainly see a nasty ~10dB drop on the 2ax between 4,000 and 5100Hz (and back up 6dB by 7,000Hz). Not something a speaker designer would let slide unless they didn't know what to do with it!Thanks I did some googling, and it was a strange beast. The main part of the crossover looked pretty much like the AR3a, but it had a 2500 uf capacitor stage, the purpose of which is a mystery to me.
Thanks That makes sense electrically. I'm not sure why they felt the need for that kind of protection on such a robust woofer. But it's ancient history.The 2500u cap was to limit the low frequencies going to the woofer and overloading it or even damaging it.
All the best,
Leon(The Audiomayvin, Montreal(514)739-5403)
JimFun article! I was in high school from 70-73 and worked for my Dad's high-fi shop in Oak Ridge, Tennessee. During a great era of speakers and stereo. I can't tell you how many AR-3, KLH 17's and JBL L100's I sold and demo'd. While I loved the L100's ($273 min fair trade price in 72) I bought a pair of JBL L65 Jubals that also featured that "Bright west coast sound" that I love. The Jubals had a unique prism shaped plastic polymer tweeter in a slotted enclosure. Between the crisp highs and solid yet tight bass, coupled with a Pioneer SX-1010 105watt RMS/channel receiver, I had THE kickass stereo in my MIT Fraternity... While just a freshman! Unfortunately a crook with taste broke into my Dallas home in the mid-90s and took the Jubals which I replCed with Snell Type D's. Nan other great speaker.
I am in the process of picking up a pair of JBL L100's from Craigslist this week. Looking forward to restoring the finish. The components are still lively. Love that west coast sound.
Thanks for the article!
Jim in Boulder
Missed out on a pair of Altec Voice of the Theater. Where in the same spot for over 50 years and went for $25.00 for the pair.What about Altec? The voice of the theatre and 604s? I know they are older than 50 years, but its good to mention.
Looking at my copy of 1977 High Fidelity Test Reports, speaker companies represented were:This list will absolutely be geo-dependent, which means it will be quite different overseas....
But as you stated it's an American centric article, so my remarks may not be fully relevant, then....
It's claimed elsewhere that Fisher were the ones inventing the dome tweeter and not AR, is that correct?... but AR then were the first to use it commercially on a large scale...
But I don't understand how you could miss Quad Electrostats, DCM Time Window, Vandersteen Model 1 .... Duntech's also made raging waves, but probably not so much in the US .... Also Joachim Gerhard made a revolution in Europe with the original Audio Physic Virgo. In the hi-end arena, Audio Physic is always there ...... But I guess the Virgo never made it to the US.
Dynaudio Consequence has been sold, more or less unchanged since 1984, Consequence Ultimate Edition replaced the original version a few years ago, but that a statement product of a hi end manufacturer is almost unchanged for more than 30 years is some influential indeed ....
Miller & Kreisel is absent, well..... As I understand, they were the guys that invented subwoofers, how can anything be more influential than that?
Also agree about KEF, they influenced speaker industry at large IMHO
And also about Bang & Olufsen, they were major player on speakers if you go back some years, but probably mostly in Northern Europe markets
Probably there's too many good speakers![]()