The TB-50 Tube Phono Equalizer is a vacuum tube hybrid phono equalizer developed specifically for DS Audio optical cartridges.
JUNE 8, 2026
"With the DS-E3 cartridge/energizer, it’s like looking at a Grand Master EX Mini-Me. That is not a backhanded compliment. I hate to jump the gun rather than leave you in suspense but at this point I must say what you’re getting today for £2295 is akin to what would have cost you £10,000 three years ago. Rarely have I seen such beneficial use of trickledown technology, and in such a short time." - Ken Kessler, HiFiNews
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