I'm glad to see your enjoying the CA-3000. If working properly they are defiantly nice units. I had mine years before experiencing any popping issues. Lots of info here on restorations. I really like the fact I could easily switch between the BA-5000 and tube monoblocks (dual output option). Watthour's expertise brought my CA-3K Preamp & Sansui HF-L60's to a whole different level. Right now I'm sitting in my home office cranking some Yes Stormship Trooper and loving life.