@almarg
I would be genuinely shocked to discover a Pass XA30.8 exhibiting ringing. Nelson believes in wide bandwidth but also takes great care to avoid ringing in his amps. He once built an amp at Threshold that became unstable into cables such as we're describing and it released the magic smoke. Since then he's made it a point to avoid designs with that possibility. The F5 is an exception to that where he specifically warns against exotic cables that are good at transmitting high frequencies, like Litz wire, because of the DC-1MHz bandwidth of the amp. I suppose it's technically possible something could fail to allow that, but I think we'd be talking about a short or a resistor failing closed and that would lead to far more drama than a shrill top end.
I would be genuinely shocked to discover a Pass XA30.8 exhibiting ringing. Nelson believes in wide bandwidth but also takes great care to avoid ringing in his amps. He once built an amp at Threshold that became unstable into cables such as we're describing and it released the magic smoke. Since then he's made it a point to avoid designs with that possibility. The F5 is an exception to that where he specifically warns against exotic cables that are good at transmitting high frequencies, like Litz wire, because of the DC-1MHz bandwidth of the amp. I suppose it's technically possible something could fail to allow that, but I think we'd be talking about a short or a resistor failing closed and that would lead to far more drama than a shrill top end.
