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Ett DIYaudio kollektiv med Nelson Pass i hovedrollen har lagt merke til noe litt underlig. På en av sine kreasjoner (SIT-1) var det en knapp hvor man kunne variere mengden og fasen av 2.harmoniske mellom positiv og negativ fase.
I had a knob on the front of the amplifier which varied the amount and phase of the 2nd harmonic. It was easy enough to lend the amplifiers to listeners who didn't know what the knob did and gather their comments. Roughly speaking, they tended to prefer about 1% negative phase 2nd harmonic, so it became my standard setting for that knob."
Fra tidligere har jeg hørt om forsterkere som leverer ulike mengder 2.harmoniske og 3.harmoniske, men aldri har jeg hørt snakk om dette. Det skal altså være forskjeller å spore om man snur fasen på 2.harmonske. Hva går så disse forskjellene ut på?
"So why is the phase important? Well, it's a subtle thing. I don't suppose everyone can hear it, and fewer particularly care, but from listening tests we learn that there is a tendency to interpret negative phase 2nd [harmonic] as giving a deeper soundstage and improved localization [of images] than otherwise. Positive phase seems to put the instruments and vocals closer and a little more in-your-face with enhanced detail." When you turn the knob to the left, which is negative-phase second harmonic, the room gets bigger, more atmospheric, you start to see images of musicians. Turn the knob right, you get positive-phase second harmonic, which brings the musicians closer to you: drier but more intimate, more apparent detail. But of course," Pass reminded us, grinning hugely," this is all illusion!"
Det kan derfor tenkes at det kan ligge noe subjektiv god lyd her som i vært fall jeg ikke har vært klar over tidligere.
Nelson Pass har selvsagt utviklet en egen dings som genererer 2.harmonisk vreng. Jeg er usikker på om denne er å få kjøp, men han gav bort mange printkort på en diyfest en stund tilbake. Men likevel er det vell mere interessant å kjenne til fasen til egen forsterker, eller den man kunne tenke seg.
https://www.stereophile.com/content/gramophone-dreams-26-nelson-pass-harmonic-distortion
https://positive-feedback.com/audio-discourse/the-pass-h2-harmonic-generator/
I had a knob on the front of the amplifier which varied the amount and phase of the 2nd harmonic. It was easy enough to lend the amplifiers to listeners who didn't know what the knob did and gather their comments. Roughly speaking, they tended to prefer about 1% negative phase 2nd harmonic, so it became my standard setting for that knob."
Fra tidligere har jeg hørt om forsterkere som leverer ulike mengder 2.harmoniske og 3.harmoniske, men aldri har jeg hørt snakk om dette. Det skal altså være forskjeller å spore om man snur fasen på 2.harmonske. Hva går så disse forskjellene ut på?
"So why is the phase important? Well, it's a subtle thing. I don't suppose everyone can hear it, and fewer particularly care, but from listening tests we learn that there is a tendency to interpret negative phase 2nd [harmonic] as giving a deeper soundstage and improved localization [of images] than otherwise. Positive phase seems to put the instruments and vocals closer and a little more in-your-face with enhanced detail." When you turn the knob to the left, which is negative-phase second harmonic, the room gets bigger, more atmospheric, you start to see images of musicians. Turn the knob right, you get positive-phase second harmonic, which brings the musicians closer to you: drier but more intimate, more apparent detail. But of course," Pass reminded us, grinning hugely," this is all illusion!"
Det kan derfor tenkes at det kan ligge noe subjektiv god lyd her som i vært fall jeg ikke har vært klar over tidligere.
Nelson Pass har selvsagt utviklet en egen dings som genererer 2.harmonisk vreng. Jeg er usikker på om denne er å få kjøp, men han gav bort mange printkort på en diyfest en stund tilbake. Men likevel er det vell mere interessant å kjenne til fasen til egen forsterker, eller den man kunne tenke seg.
https://www.stereophile.com/content/gramophone-dreams-26-nelson-pass-harmonic-distortion
https://positive-feedback.com/audio-discourse/the-pass-h2-harmonic-generator/