This Korg KMS 30 Midi Synchroniser is in mint condition, and comes complete with its original box, power supply and manual. Here's a quick spec...
 
Korg KMS‑30 MIDI Synchronizer
The Korg KMS‑30 is a classic MIDI synchronisation unit designed to seamlessly connect modern MIDI equipment with vintage sync‑based instruments. Released in the mid‑1980s, the KMS‑30 became an essential studio tool for musicians working with hybrid setups, allowing drum machines, sequencers, and tape‑based systems to run together in perfect time.
MIDI ↔ Sync Conversion: Converts MIDI clock to analogue sync (and vice versa), enabling reliable synchronisation between MIDI devices and vintage DIN‑sync drum machines and sequencers. 
Multiple Sync Formats Supported: Handles MIDI clock, analogue sync (24 or 48 pulses per quarter note), and tape clock, making it highly flexible for classic and modern studio workflows. 
Start / Stop Compatibility: Transmits and receives MIDI Start, Stop, and Timing Clock messages to ensure all connected devices begin and stop playback together. 
Comprehensive Connectivity:
MIDI In
Two MIDI Outs (acting as MIDI Thru when MIDI is selected as master clock)
Sync In and two Sync Outs
Tape In and Tape Out (RCA). 
Selectable Master Clock Source: Easily switch between MIDI, Sync, or Tape as the master timing reference, allowing the KMS‑30 to adapt to different studio configurations. [manualslib.com]
Tempo Indicator: A front‑panel LED flashes in time with the current tempo, providing a clear visual reference during operation. 
Compact & Reliable Design: Built in a sturdy, compact enclosure with a simple, switch‑based interface that is easy to operate and highly dependable in both studio and live performance environments. 
 
The Korg KMS‑30 is especially prized by producers and performers using classic drum machines such as Roland and Korg sync devices alongside MIDI sequencers. Its reliability and versatility have made it a long‑standing favourite for maintaining tight, stable timing across mixed‑generation music systems.