BMB DEP- 3000K Digital Echo Processor Key Karaoke Mixing Control MADE IN JAPAN. BMB DEP-3000K Karaoke Digital Echo Processor. Up for sell is a BMB DEP-3000K Professional Karaoke Mixer with Digital Echo Processor w/ Key Controller, Made in Japan. This is the best karaoke sound mixer from “BMB”. It offers superior sound quality in singing […]