Difference between mark 1 and mark 2 is primarily in the power cable. The power of two Troys is "exponential". All seniors in the AE community are using two for more than 18 months. No more cross talks - dedicated binding posts for each power amps further lowers the noise floor in a big way.
草哥 is also using the cost no object - Thor ground cable as well.
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草哥 is also using the cost no object - Thor ground cable as well.