Diy) Amp needed for Infinity Renaissance 90 | diyAudio
Infinity Renaissance 90's | Headphone Reviews and Discussion - Head-Fi.org
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Infinity Renaissance 80 For Sale - US Audio Mart
Archimago's Musings: MEASUREMENTS: Melody Onix SP3 Mk. II (~2006) Class AB Tube Integrated Amplifier. (And it isn't "diminishing returns" on sound quality, often there are simply "no returns".)