When it comes to older gear, and this is not just related to ARC, one thing to do that will greatly improve the sonic of said gear is to change the fuses. Be it Synergistic Orange or Blue, Hi Fi Tuning, etc. the differences in sonic is dramatic. In my experience with the Blue and Orange fuses, the component will retain its sound character but will only be improved in terms of details, precision, soundstage, cleaner bass, etc. Cost wise, they aren't cheap but they can be seen as a relative bargain when auditionned per their performance.
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