Look guys, OF COURSE I don't have the extended hearing of my youth. My 'old' ears are more forgiving, to be sure, but I can still hear pretty well. Personally, I don't think that pure frequency response flatness is the main ingredient in hearing hi's. I think it is also RISETIME, and that does not seem to fall off as early as static tones.
I don't think that Dave can help me now, or he would have done it before the units left the factory. That's OK, I have another solution.
I don't think that Dave can help me now, or he would have done it before the units left the factory. That's OK, I have another solution.
I have to use an AC rated line cap (X type cap) to be safe, I think that they are the stacked film type. I tried a 500v ceramic once years ago and it blew up while I was listening to the system. I think the stacked film is the best I can do in this app, unless you have any suggestions?
As we all age our high frequency hearing is decreasing. I wonder when someone will make a high frequency EQ "booster" of high enough quality that the audiophiles will approve of and use. We just can't ignore the natural affects of aging forever, for the sake of a "pure" electronic path. If we do we will be missing out on listening enjoyment.
I bet John could whip up an audiophile approved high frequency boost circuit in a few minutes. Any ideas come to mind John?
I bet John could whip up an audiophile approved high frequency boost circuit in a few minutes. Any ideas come to mind John?
It's the quality of the circuit design and the parts used that I am talking about, not a well known "tone control" design and op amps, audiophiles would never use that. There was a thread at one of the other forums here at DIY Audio about just this thing, I never saw it come to a design that everyone liked.
Rick,
From all I read most audio guys and gals just won't use any type of tone control, or at least won't admit it, but they will do all kinds of things to correct the FR, even if they make things worse doing it. Doug Self has a tone control design in his preamp but that is based on opamps I think.
From all I read most audio guys and gals just won't use any type of tone control, or at least won't admit it, but they will do all kinds of things to correct the FR, even if they make things worse doing it. Doug Self has a tone control design in his preamp but that is based on opamps I think.
Kids have been known to use ring tones adults( teachers) can't hear. Seven-11 blasts the same tones to keep kids from congregating outside. Most men's hearing sucks after 15k. The whole stereo thing is a function of the brain. Ever thrown a ball to a dog, he hears it land but cannot there the direction it landed if not in sight. There is a really good thesis on vision and how the brain presses steel vision, done by a robotics guy the the 80's. This is why babies miss and knock over cups, etc. I would venture since the loss of high frequency is gradual your brain learns to compensate.
In the world outside the model of the world :
I am quasi - deaf in the context of a hearing test .
But yet discern aural events beyond the range of
my less 'challenged' friends
This is part of the story, most of the expensive speakers I've heard sounded absolutely dreadful as soon as you gave them a bit of stick, not because there's a problem with the speakers but because the driving electronics started to fall to pieces, so to speak, once they were asked the question. This, for example, is where the Bryston I heard 'knew' what it was doing, increasing the volume merely increased the subjective intensity of the sound, it didn't degenerate into the typical 'loud hifi' sound.
The other part of the story is that the quality is there over the full dynamic range of the material - otherwise increasing the volume then reveals how mangled, or absent, the low level detail within the recording is, caused by deficiencies in the playback.
Neither here nor there, please take no offense (just a data point) but Thiel's at any price level almost always drive me out of the room.
I agree with you, the Strauss gold was bad asss. I blew them up, it was hard to do, the theils? Let's just say, I am friends with the repair crew. At low level, I think the rock. Again my only reference is playing music.
Last edited:
Are we talking some sort of RF here, because for high speed digital you would have a ground plane, or use LVDS, where the signals would be edge coupled on a PCB. As I said a ground plane on a PCB is usually mandatory for high speed digital, and analogue. The only time I have seen deviation from this is some RF stuff, where I have seen the ground removed from under a trace due to capacitive coupling, the ground was on either side edge coupling the signal, so again with ground proximity the current density would be greater at the signal edges, on these traces.
I am now more intrigued in what you are transmitting, and why no return plane, or return path in close proximity for high speed signals.
There have been numerous discussions and papers over the years of the roughness of PCB copper on signal integrity:
Printed Circuit Design & Fab Magazine Online
Printed Circuit Design & Fab Magazine Online
One is 'driven out off the room' because the speaker is 'ruthlessly revealing' the distortion being injected into the mix by the playback system - Wilson speakers do that sort of thing for me, I need solid shots of red wine to 'handle' them ...,
Yes one time (the worst actually) it was about $100,000 worth of Cello's best including I guess what would be their version of the BT.
In fact it must have been more $$$ there were two massive ML amps, maybe it was just ML's vanity jazz recordings. This highend business is so easy to make fun of.EDIT - This was a store BTW, Bob Adams asked me along because ADI wanted a serious listening room installed and asked the local store to demo us "the best".
Last edited:
- Status
- Not open for further replies.