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In Reply to: RE: Does the Altec 604 design make sense? posted by PaulF70 on December 28, 2014 at 17:50:55
since the MAstering Lab with Doug Sax once used them as studio monitors, I would say there's something to their design.
Follow Ups:
And the Altec engineers who designed them were likely not idiots either!
In retrospect, I should have asked "WHY do they make sense?" - not if.
The horn centered in the woofer makes for a point source driver system. Most horns which have the horns mounted away from the woofer center need much space for the horn to blend in with the standard design woofer, that s the listener has sit farther way to achieve a proper blend of the drivers This , of course, is true with mos multi driver systems . The 604 allows the listener to sit closer to the system and still hear imaging qualities, at least from a horn tweeter. Probably,why TML used it.
Incidentally I do own a couple o pairs of 604's. On one pair the center horn cell fell off and that one sounds the best.
And actually isn't it true that the drivers' wavefronts cannot sum in phase (at any distance) if their centers are more than 1/4's WL apart? So the DC design has advantages unrelated to distance, etc.
I was at The Mastering Lab back in the 70s. Very "dead" control room. The sound changed noticeably as you moved around the room (which isn't very large), due to the deadness combined with the directivity of the Altecs.
It seems to me that they also had a Stephens multi-track tape recorder.
:)
"On one pair the center horn cell fell off and that one sounds the best."
Do you mean just the one center cross member (left to right in the picture) leaving the cross members, for the left cell and the right cell, in place along with the 2 vertical cross members?
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
The horn is often in two segments(I thought it was always like that but I was corrected). One part has the mounting flange and throat, the other portion is the outer part with the cells and mouth. There is a glued seem that splits on some, probably depending on handling and storage.
See the link for the two throat and horn versions.
Edits: 12/29/14
"One part has the mounting flange and throat, the other portion is the outer part with the cells and mouth."My concern is that if Stu's "cells and mouth" fell off and he is listening with only the "mounting flange and throat" the diaphragm will not be properly loaded (coupled to the air) and could be easily damaged if played loudly.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 12/29/14
I can't respond to the original poster's question ( I am not an industry insider),but I would like to ask for opinions on the value of biamping a pair of 604C's vs using an upgraded (J Markwart) passive crossover.
I have had a pair of the 604cs in storage for too long and I intend to give them a go soon. My current speakers are a pair of RCA LC1s.
thanks
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