jjk@burl.UUCP (jjk) (02/04/85)
Does anyone have any feeling about the use of equalizers (graphic or
parametric) and the phase changes (distortion?) they introduce? I'm
about to build a pre-amp that does not have tone controls, so I'm
considering adding an equalizer to my system. Any suggestions about
types, designs, or manufacturers?
Are there any sources for tone controls as a separate processors? What
about using parametric tone controls (i.e. only bass and treble but with
variable frequencies)?
I'm also considering buying or building a spectrum analyzer. Does anyone
out there use a spectrum analyzer in conjunction with an equalizer
(and a noise source) to compensate for the room acoustics?
_____________________________________________________
"One more red nightmare..."
John J. Kenney
(AT&T Technologies, Burlington, NC)
919-228-3328 (Cornet 291)
path: ...![ ihnp4 ulysses cbosgd mgnetp ]!burl!jjk
--
John J. Kenney
burl!jjkrfg@hound.UUCP (R.GRANTGES) (02/07/85)
[] Sure. I have an Audio Control C-101. I don't use the equalizer portion much, but when I need it, its a blessing. The real-time spectrum analyzer display is a constant joy - and can be both reassuring (Jet plane fly by at 6' on "Digital Domain" CD is not a tweeter buster) and alarming (Other tracks on same cd could be). The display plus built in pink noise source showed me all I needed to equalize <my> speaker-room combination was some moderate treble boost as introduced better by tone control on my integrated amp than by the octave equalizer. So the equalizer is free for corrective action on source material. For this and other reasons, I would put tone controls on a preamp. Many designs are available that are, or can be made effectively out-of-circuit when so desired. As for phase shift, per se, you would be beter off not to worry about it. If you must worry about something, try the weather or World War III or some similar subject that is both simpler and more likely to affect you adversely. Of course, if you are a true "golden ear" and can hear the abdominal hairs on a flea rubbing together at 30 ft, even when there is no flea, forget all this advice - but if you were <truly> a "golden ear" you would not be asking, you would be telling. (Psych majors or perhaps even minors will have recognized the signs of a Salieri complex by now, but what the hell). -- "It's the thought, if any, that counts!" Dick Grantges hound!rfg