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