IDOLpro IP-3988 400W Karaoke Mixing Amplifier – REFURBISHED. This unit has been factiry refurbished by Idolpro and is 100% guranteed to work perfectly. The new affordable IDOLpro IP-3988 responds directly to the needs and requirements of karaoke professionals and home users desiring a high quality professional mixing amplifier with a wife dynamic range and new, […]