"High-end Audio" (2023 Update)

Gullible twits. The same sort of people who think that Donald Trump did a great job when he was president of the United States, and who post recycled climate change denial propaganda here. I can't say that I've got any evidence that Gnatguy and John Larkin paid too much for their domestic audio equipment, but I wouldn't be surprised if they had.

Anthony William Sloman snipped-for-privacy@ieee.org wrote in news: snipped-for-privacy@googlegroups.com:

Bill, did you go check out that GeoGirl earth history link I posted here? I did not see a response. You were talking about carbon, CO2, etc.

Sorry, I may have missed something. What good is that, exactly?

I can assure you, any good Donald Trmp did for others, is purely incidental.

wow. Gold plated contacts, black ceramic body - that is the prettiest fuse I've ever seen. must be meant for "glass windowed" power supplies ;-) (those show piece amplifiers you see at high shows)

FINALLY the dark secrets of electronics are leaked! I have been installing all my parts in random ways. I never knew, resistors, capacitors, fuses, ..wow. No wonder then they all sounded terrible. Those poor little critters must have been tortured so forced to conduct electricity the wrong way.

It woz t'diodes wot did it. ;)

Cheers

Phil Hobbs

Well, at least they got the ensure/insure usage right -

However, I'm skeptical of the amount of money they spent, since they claim it was "incredible".

Anyway, is there any audio beef in the propaganda regarding Monster cable, with their near zero resistance and inductance?

was the bands of cathodes that led young boys astray ;-)

Donald Trump did have the good luck to come to power after the Democrats had spent eight years cleaning up after the global financial crisis, which was the global aftermath of Dubbya's sub-prime portage crisis. Having pretty much created the GFC on their own, the Republican Party did all they could to slow down the recovery, then claimed the credit for the results of the Democrat's hard work.

And Donald Trump had nothing to do with the quick development of the Covid-19 vaccines. Once they had been developed he was happy to throw money into buying them up. Gnatguy is convinced that that does entitle him to the credit for the development, but Gnatguy is a classic gullible twit.

The reduced inflow of illegal aliens seems to be more smoke and mirrors. Trump's famous border wall never did get built.

Except that there wasn't any good work at all, and a lot of self-serving lies

But for Trump's supporters nothing matter except his self-serving lies. Reality doesn't get a look in. That's how gullible twits think.

amdx snipped-for-privacy@knology.net wrote in news:tgvgcm$4cjm$ snipped-for-privacy@dont-email.me:

That is a word that TRUMP made up, but if it applies to anyone at all, it is Trump's RETARDED BLIND cult, of which you are obvioulsy a member.

Great job too, of NOT answering the question.

So, give us a list, boy.

Rich S snipped-for-privacy@gmail.com wrote in news:1d49e4b2-cb87-4a7b- snipped-for-privacy@googlegroups.com:

Probably only a microinch of Gold (i forgot... metric)

Probably scrapes off on insertion.

Rich S snipped-for-privacy@gmail.com wrote in news: snipped-for-privacy@googlegroups.com:

They could only ever play half the music.

Diode: band marks the cathode

Bridge rectifier: + marks the pos output

Tantalum cap: mark the positive

Aluminum cap: mark the negative

Film cap: mark the outside foil, if any

LED: do something random

IC pin 1: optional

DVM: red is ohms +, except in Japan.

Military: current flows backwards

LT Spice: current flows right to left

They did not even give the i^2R rating for that fuse.

"High end" amplifiers tend to have oversized capacitors in the power supply to keep the DC supply voltage stable for problematic signals and/or problematic speakers. This means that the capacitor voltage is close to the peak voltage of the rectified transformer voltage.

Thus the rectifiers conduct only close to the mains peak voltage. However, the total load power must be delivered during this short conduction angle, thus the peak current must be many times larger than the load to a resistive load. Thus the fuse i^2R heating is also much greater, increasing the risk for blowing the fuse. Thus the i^2R rating should be greater than the i^2R ratings for an ordinary fuse with some nominal current value. this very high peak current (often tens of amps) will cause extra power losses in house wirings as well as extra voltage losses, so the voltage delivered to the amplifier looks more like a flat top sine wave i,e, lots of harmonics.

In many countries the peak most be widened with some PFC usually consisting of some boost switcher. ' HE' people usually do not like switchers in power supplies or audio amplifiers, so wonder how they are going to sell their equipment into countries with power factor regulations :--)

Do they sell three phase power supplies ? These would be quite ideal for feeding 'HE' amplifiers, not much need for storage capacitors even for feeding problematic loads. The mains conduction angles are greater and hence peak currents smaller even with just a 6 pulse rectifier. With a 12 pulse rectifier (requiring extra addition mains transformer secondary windings for both wye and delta connection), this will clean up the current drawn and no extra circuits are needed to mains power factor requirements in most counties.

Some may complain that they currently have single phase mains feed, but in most places a three phase feed is available with a reasonable amount of money, compared to the sums someone spend for audio interconnection cables :-).

On a sunny day (Mon, 03 Oct 2022 16:40:09 +0300) it happened snipped-for-privacy@downunder.com wrote in snipped-for-privacy@4ax.com:

You can use a big inductor after the mains bridge rectifier and before the filter cap. Some audio guys like big transformers anyways.

And usually music peaks only ever so often, no continuously max current.

That doesn't actually impact the power factor issue. The power factor is mucked by the large capacitance relative to the load. So the lower power draws are when the power factor is most blorged.

The inductor would definitely help, but it would need to be large, just like the capacitors are large.

On a sunny day (Mon, 3 Oct 2022 08:26:37 -0700 (PDT)) it happened Ricky snipped-for-privacy@gmail.com wrote in snipped-for-privacy@googlegroups.com:

Indeed

Yes.

As to HE audio, I remember in the early sixties going to a church where some group was playing classical music they had Quad electrostats, I was blown out by the quality of sound.. Later in the TV studios we had 2 Quad elecrostats in each sound control room.. (6 studios back then in that complex).

Sometimes I wonder if I should not get some, quite expensive these days, But many times better than piezo tweeters etc for the highs, very transparent sound.

In the tube rectifier era, the pi-configuration (CLC) was common to limit the rectifier current peaks. In many cases the main choke was physically nearly as big as the output transformer.

Think about reproducing a low note (<30 Hz) from a big pipe organ, requires multiple mains cycles to drive a full organ cycle.