| My few period DHT tube all have this springy sound but they also has a long decay of rattling. It is like string attached under the bottom of the drum and when the drum sound dies away them strings continues to vibrate. I am not accustomed to correlate this mechanic stress response to auditable effect for signal that flow via tube but I was under impression that this is very negative effect. However, if I discard the tendencies to microphonics then I did not see any coloration between shakeabilety and sound, in fact I remember that some of “microphonic tubes” had better sound then non-microphonics tubes. |
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