“…All the Right Reference Points” "Jeff Harris's Analog Reference setup... mixed hi-fi royalty from Rockport, Döhmann, Hana, Boulder, and Audio Research... Instead [of the usual show bling], I got one of the great revelations of SWAF. Record after record, the Reference Analog rig proved itself a marvel." — Ken Micallef, Stereophile

"Here, at Vienna 2026, I knew what to expect–a big horn system that didn’t sound like a big horn system. That’s what I got, and it was superb."

The TB-50 Tube Phono Equalizer is a vacuum tube hybrid phono equalizer developed specifically for DS Audio optical cartridges.