Sequential Circuits Prophet 600 OS SIX-08 EPROM Firmware Update KIT / New ROM

Behringer 2600-VCO Analog VCO Module

Sequential Circuits Six-Trak OS v14 EPROM Firmware Upgrade KIT / New ROM Update

Ensoniq MR Rack OS v1.53 EPROM Firmware Upgrade KIT / New ROM Final Update Chips

Roland GR-50 OS v1.14 EPROM Firmware Upgrade SET / New ROM Final Update Chips

Behringer CAT Analog Desktop Synthesizer with removable rack ears.

Ensoniq SQ-80 OS v1.8 EPROM Firmware Upgrade SET [with hidden Waves enabled!]

Sequential Circuits MAX OS 0.5 EPROM Firmware Upgrade KIT / New ROM Update Chip