Korg DT-1 PRO Digital Tuner Rack Style Tuner. KORG DT-1 PRO DIGITAL TUNER. A/C powered. Rack Mount, This is a top of the line pro tuner. Other models are either battery operated or cheaper in design. Sold new for close to $500.00 Measures 17" x 8 1/4" x 1 3/4" L@@K AT THIS!!! KORG DT-1 1986 VINTAGE TUNER ORIGINAL OWNER Author. Topic: Korg DTR-1 Rack Digital Tuners >BTTT. Frank Raines. From: Ohio, USA. Posted 15 Mar 2020 2:05 pm. Have 2 of these rack tuners, they been in a spare rack since I bought them (as new), has Cents/Strobe/Hz tuning, with each having a manual 125.00 plus shipping thanks frank. Vintage Korg DT-1 Chromatic Digital Tuner -- in Original Box w/ Manual & Paperwork; Made in Japan. $99. Used - Very Good.