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In Reply to: RE: Sure !! .... posted by drlowmu on March 18, 2012 at 23:12:07
To me that implies it does not have sufficient capacity for the load. Sure there will always be some voltage variation with unregulated audio power amp supplies. But the design goal, at least the commercially practiced goal, is to keep this wandering to a minimum.Consider this, if the power supply was a large battery bank, let's say in the case of a 2 watt SE amp, the battery bank is 100 amps. Now will there be a recovery period here?
Now I have no doubt this hypothetical battery supplies amp will sound quite different than a LSES amp. It will be "lifeless" and "dull" to use your words - right? See I do know what is going on here. The LSES is a dynamics enhancer. And that does sound good. But is it real?
Edits: 03/19/12 03/19/12Follow Ups:
Tell us about the processing equipment in your rack at home?
Do you use this equipment at all times?
I have DBX 3BX3 and a 3BX1. These are the later models but there is also the coveted DBX4. I have a relay bypass unit that switches them in and out of the path as needed. The internal bypass switch is fine but I have the relay bypass under remote control from my Ipad along with a host of other system functions.Keep in mind this is a home theater setup. Older movies and shows benefit greatly from a little dynamic range boost. Modern Bluray disks need no processing.
In my music system I don't even have a preamp. CD player with built in motorized analog volume control direct to the power amp.
DBX made many models of these "companders" in the 1970s. You can always find the earlier units on EBAY. The later units like mine are not as commen but they do come up now and then. The basic upgrades over the years were better and better VCAs which is the heart of the unit.
Edits: 03/19/12
thanks gusser...cool stuff, love your home theater!
Batteries on B+ supplies for tube amps, I've been told by people I respect, is NOT the ultimate in sonics.
No Gusser, you really do not understand, but you think you do, and that is the problem.
PLEASE do me and you a favor, (this is the second time I bring this up).
Let me send you a email attachment from EEs John Swenson and John Hasquin, so that you may read it in chronological order. You have bits and pieces, but I can tell - truly not a full grasp.
The modern supply is not an enhancer at all, it delivers the goodies when it is needed, and not after the note has come and gone.
Have an OPEN mind, like a good professional engineer should, and send me your email address, mine is above. It will enhance the common ground we share between us, so ACT now, today !!
Jeff Medwin
.
You try marginalize me by saying I mock EEs and am I not a engineering professional, so what I say can't matter.
I ask you to keep an open mind. If what I say doesn't matter to you, how about graduate Electronic Engineers??
We have THREE EE professionals who have written about "modern" supplies on this Forum, three who have ACTUALLY built it, and tested it successfully. All three claim it provides SUPERIOR REGULATION Gusser. Two actually listen to them.
Are these three guys, listed below, professional enough for your tastes ???
Two other questions come to MY mind about you :
(1) WHY are you unwilling to read my twice offered compilation of your fellow electronic engineer's work / posting on this subject????
(2) WHAT does that "look like" as far as your own "professionalism" and your open-mindedness to look into a new subject.
Surely, these three following Forum posters, can be considered as "professionals", although NONE touts themselves as being so, like you do :
1) Henry Pasternak (Opus48, No 1.)
2) John Swenson
3) John L Hasquin (JLH)
Jeff Medwin
hdtv101@earthlink.net
Good job, good man !!
Jeff Medwin
a
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