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In Reply to: RE: "biamp the IIIas they way they should be biamped"! ... posted by 66mgb on September 26, 2020 at 07:29:57
Yes, there is a DIY project, Pass 6-24XO, that can do more than the textbook slopes. I have two of these boards on my desk. I do not like the electrolytics at in- and output. The impedance could also be lower. As Nelson Pass is the designer some guys get excited...
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I don't know about the kit, but the factory-built B4 has an output impedance of 125 ohms. It has no coupling capacitors, the filter caps are Wima polypropylene, the resistors Vishay metal film. Good enough for me!
That is the B4. I refer to the 6-24XO that is available now as a DIY-project. I mean the internal impedance. The noise level can be influened by it. Good pratice is to stay between 4-15 k for the RC-links, not 10-60k as it is in the 6-24XO. That require bigger capacitors.
Edits: 09/27/20
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