Just to conclude the argument( at least from my side)   1-For the friend who plan to drop by to HK show room, i must say I'll leave on friday, sorry. 2-About potentiometer, I agree with Gilmore, it's not attractive to see, but a 4 section potentiometer must be long and never nice. Dact...

Spitzer are you real or just an avatar of Gilmore behind a proxy? I can't believe you exist, you are a kind of echo of him, btw the heatsinks are fixed to a base of 4mm aluminum, to this base are fixed the loads of current mirrors, all the assembly ( base plus side heatsinks ) work together as...

Edwood, it was joke, not a real test ! However it passed. Rudi

Dear F.Lo, Sorry for bad luck, a replacement amp is ready for you, However solidity is a strong point of this amp. It passed severe tests- ( Car is an heavy G.Cherokee 6L and amp is the one I use daily ) Rudi

Quote: Originally Posted by Dreadhead Is is not the general practice to state the weighting when doing this? It's interesting because a lot of audiophile publications and other manufacturer list the number as well as the weighted if they are reporting something.... Misleading as far as...

Quote: Originally Posted by Pars Change the bandwidth or input impedance or both and the possible SNR will vary accordingly. ... ALMOST RIGHT, I was waiting for this, guys. ( yes old teacher !!). The figures given by the online calculator used by one of you ( sorry i...

I have insulted, who? 1) I have replied on this forum only becouse cosmopragma have not mailed to me but addressed me on the forum and naturally I have answered in thesame way. 2) I have fully refunded an unstisfied user, it this an insult ? Btw. From my point of view the issue is...

Uwe, since you have not mailed to me but posted in a public forum, I replay in the same way First of all Uwe I have to said that what you did this totally unfair. I understood that your amp have a problem, probably something happened during transportation. BTW The amp was tested for 72 hrs...

Quote: Originally Posted by gurus I just got a pair of 501s. Its a keeper for me. So I am looking to mate it with a good amp that can drive these ineffecient phones and brings out the best in them. The RP-31 that I have is not it. Rudi's thoughts also on it- "AKG501 is an obsolete...

Thanks a Lot Rudi

Quote: Originally Posted by gaboo Look here for difference between longitudinal and transverse waves. This is how a point source radiates in 2D. And here for a loudspeaker model. Right and interesting but OT related to the basic question. Is phase rotation detectable as a...

Make the experiment( it is a school lab exercise ) You need a dual channel scope. Connect a microhone on each channell ( A and B) Put the microphones at the same distance from generator speaker and use confortable a test frequency like 5KHz. You will have two waves on the scope screen, similar...

Quote: Originally Posted by Publius Easy way to test this: pick up your $5 computer microphone, start recording, and snap your fingers 5 inches away. Note the polarity of the first wave of the signal. Now snap your fingers 1 meter away. Did the polarity change in any significant way...

Quote: Originally Posted by gaboo That's only true for sine waves. Conside a an ideal (Dirac) impulse: it's phase is unchanged regardless of listening distance. Right, but drum ( like other musical instruments) are much more wave generators then "ideal Dirac Impulse" generators

Quote: Originally Posted by chillysalsa I personally think absolute phase means something. When I pluck a guitar string, or hit a drum, I'm convinced the brain identifies some quality of the sound best described as 'impact', from the fact that the first waves to hit your ear drum are...

No, your is a semplification, or better a convention to reppreent graphicaly the events in the time domain. Any strange shape wave is only a composition of pure sine waves, at different frequencies and amplitiude. ( Fourrier)

Quote: Originally Posted by kevin gilmore So all you people out there with tube amps and sennheiser headphones, flip those connectors around and see if you can hear the difference. If you make the test in a completly silent room ( anecoic ) you can't hear difference inverting...

Quote: Originally Posted by gsferrari I agree I leave my headphones in the amp when I turn on/off because if I dont and I plug them in later I get a HUGE POP from the caps reserves...How do I wire a bleeder resistor? 470 ohms should do it? Between cap+ and ground? Cheers...

Quote: Originally Posted by GoRedwings19 Seriously. I went to sleep while listening to music, I woke up this morning switched the amp off and went to work. I came home switched it on, press play on my cd player and only sound came out of one side. Pull the headphone jack out, pushed it...

I have owned more then 20 Stax electrostatics ( gamma, lambda, omega )and of course some OmegaII. I have also repaired or upgraded many of those for myself or my customer, so I have enough data to make statistics. 1) all the electrostatics are humidity and temperature sensitives. The...

I can't believe!!! Gillmore is joking or the design is copyed the and he don't know how it works. Everybody knowing basic electronics can understand, both stages have a huge feed-back. The worst kind of feedback as in all KG design. A solution that make the projects easy to build and tune...

Full of feed-back and dangerous for headphone The third harmonic made by input pentode dostortion is compensated by feed-back. Poor idea coming staight from component databook! very far from Hi-end. Very low power ( for sure not enough for to drive HD650 - Rs1 ) Very dangerous for...

Quote: Originally Posted by eric343 Rudi, the problem you might have is creating a Tesla-coil based plasma generator that runs at megahertz frequencies without causing massive electromagnetic interference. . This is the problem. But like for any problem there is a solution...

Quote: Originally Posted by kevin gilmore Rudi is very much like tesla. This is a compliment. Well sorta Tesla was a genius, there is no doubt. All my magnets are rated in tesla's, the biggest of which is 21 tesla. He was also insane. Plasma transducers are very interesting, but...