VERY Cool pre amp from Japan, the NAKAMICHI 610 CONTROL PRE AMP! Launched in 1976, this hi-fi preamp is part of the NAKAMICHI SYSTEM ONE together with the 620 amplifier. At that time it was THE worldwide reference among preamp/amp systems. RCA connections Two phono inputs with stylus adaptation system One tuner input One aux input Three player inputs One mic input Pink noise and signal (four frequencies) generator, etc. Two line outputs Additional box that allows you to manage three amps or three speaker pairs UTILIZATION Beginners will need a short time to get to know it possibilities are endless SOUNDS Typical technical limitations of the 70's OVERALL OPINION Allows you to test every possible vintage device (from speakers to signal sources), to balance and calibrate sources, etc. De frontplate has some damage and some text is damaged or lost, see pictures for details.