botrytis, these ancient Zeniths are absolutely amazing even after all these years and others will tell you the same regarding theirs. Because I didn't know any better mine spent the last 5 years in an unheated/uncooled garage. While Columbia, SC winters are mild the summers are brutally hot and humid. Even with that abuse they've lost nothing that affects their wonderful sound and should they ever require a re-charge I won't be around to know it. In many areas they surpass my $1400 Lowthers. The $500 Tang Band W8-1808 aren't even close.