This is a vintage ring modulator design with bags of character. It is based on the classic ARP4014 sub-module which was used on the ARP2500 modular and ARP2600 semi-modular synthesisers. The design has a fully discrete core but uses two op-amps for input and output amplification. Each input can be switched to either direct coupled (DC) or high pass filtered (AC) The Euro Ring Modulator ships with a 10" power ribbon and 2 M3 screws (if you require m2.5 screws pleas ad to comments when ordering)