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Är det här som VM i floskler pågår...

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Snoop hittar säkert en stärkare samt högis på ditt inlägg.. Skönt att du tillförde här också...

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De som äger Accuphase har väl alla köpt dem begagnade?

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Var kan man köpa Accuphase nytt?

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Det pratas dämpfaktor och effekt här ser jag. Effekten har inte med kontrollen att göra precis som Haakan säger, däremot spelar dämpfaktorn stor roll. Men det är ändå inte hela sanningen. Vissa högtalarelement spelar bättre med rörsteg med "dålig" dämpfaktor. Ta min OTL t.ex, dämpfaktorn ligger på ca 20. Ändå spelade den med lätthet ifrån Neos E-406 på JMLab Utopia.

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Damping factor is a spec that means more to marketing and salespeople than it does in the real world.

Technically, it is the ratio of a load impedance (such as 8 ohms) to the amp's output impedance.

You might wonder, then, why not just quote the amp's output impedance? That would make sense, but then a difference between 20 milliohms and 8 milliohms would not seem as big and dramatic as 400 versus 1000. And as I mentioned, it's a spec that is really suited to marketing.

An amp's output impedance actually varies with frequency, too. (So does a loudspeaker's impedance, but that's another matter.) The reason is that any well-designed amp circuit will have an output network that helps keep RF noise picked up on the speaker cables from getting into the amp circuitry and helps keep the amp from oscillating if it is driving high frequencies into a capacitive load. That output network usually includes an inductor in series with the output. Thus, the output impedance may be several ohms at radio frequencies, which helps keep RFI from coming in, and almost zero at bass frequencies, which is good for passing audio. QSC uses the IHF standard for determining and stating damping factor, which requires that the figure given be valid up to 1 kHz. So that will tend to result in fairly conservative specs, since 1 kHz is likely to provide the worst case figures, while bass frequencies, which are the main area of concern for damping factor, will tend to be quite better.

An easy way to play the specmanship game would be to limit the damping factor spec to a lower frequency range, such as 400 Hz or even 100 Hz. Some manufacturers do that.

Another thing to consider is that damping factor specs don't take into account the resistance of your speaker cables. It doesn't make sense to worry about a few milliohms' difference in output impedance when your speaker cables are adding tens of milliohms of series resistance. For example, two-conductor 14 AWG copper wire, a popular size for speaker cables, has a resistance of about 5 milliohms per foot. You wouldn't cut 10-foot speaker cables to 8 feet to get "tighter" bass, and you shouldn't expect an audible improvement going from an amp whose DF is 300 to one with a DF of 3000.

If the amp has a damping factor spec of a couple hundred or higher, it'll handle bass as tightly as you need; any performance deficiencies would be attributable to other causes.

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MYCKET TJUSIGT.......... flera Accuphase på gång

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