@audiolabryinth. The tubes made a huge improvement. I wish they would have told me to just by the 6h30 dr tubes in the first place. I am now going to keep my ayon cd2s. It is smooth natural and balanced from top to bottom. I am going to keep burning in the tubes but so far so good. Anyone who owns an ayon cd2s should use these tubes period. I will do another review in two weeks to update you my ayon brother. Lol.
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