The fully balanced driver section of the MC3500 MK II is an ideal match to use with Power Guard SGS. If the current becomes too high, a circuit in Power Guard SGS is activated which dynamically attenuates the input signal in real time to keep the vacuum tubes operating at safe levels. Power Guard SGS helps prevent premature vacuum tube failure by monitoring the screen grid current in the output vacuum tubes. Power Guard SGS is designed specifically for our vacuum tube amplifiers and similar in nature to our patented Power Guard ® technology found in our solid-state amplifiers. Our exclusive Power Guard Screen Grid Sensor ™ (SGS) technology is included in the MC3500 Mk II. Enjoyed it good and lamented that I am too poor to go movies more often. It must have been one or two years since the last time we went to a theater. Went to see a movie with my wife (last Star Wars). I plan to use it to select between active speakers for listening tests.Īs always, questions, comments, recommendations, etc. Needless to say, I recommend the MC-103 Pro. If you don't need gain/volume control or remote control, it would make a nice "pre-amp" replacement.
The Douk/Nobsound MC-103 Pro does what you expect it to do: switch between three balanced inputs with essentially no degradation even when held up to the high standard of my audio analyzer.
If you don't want to see such a degradation, just don't activate the other inputs at full amplitude. The still gives us signal to noise ratio of 124 dB which is well beyond any dynamic range we would require. So there is 10 dB of bleed from one input to another.
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