JRC2068 Front Fever Level Sound Adjustment Preamplifier PRO1 Preamp Tone Board Features: Audiophile preamplifier sound board adopts high-quality chip and circuit design The sound quality is clear and delicate,allowing users to enjoy a more realistic and shocking music experience Home Audio System Suitable for home system,users can connect the sound board to the amplifier and CD player and other equipment It can be connected to amplifiers,CD players and other devices Realize the fine-tuning of the music and enhance the home music appreciation effect Specification: Model:ZK-PRO1 Preamplifier Tone Board Input:12-30V,AC not allowed Operating current:28mA Audio input connector:XH2.54-3P Audio differential/balanced output connector Three XH2.54-3P terminals for left channel,right channel and subwoofer Connect to a purely rear amplifier with balanced inputs Audio single-ended/unbalanced output jacks Two XH2.54-3P terminals for left and right channel stereo and subwoofer Can be connected to ZK-1602,ZK-3002 and other pure post amplifiers Op-amp chip:six original JRC2068D Potentiometer: 50K duplex potentiometer,6MM plum blossom handle,potentiometer pitch 23.5MM Size:120*65*15MM Weight:81g Package includes: 1*ZK-PRO1 preamplifier tone board Note: Only the above package is included Due to manual measurement,please allow 0-1cm error Due to the difference of different monitors,the picture may not reflect the actual color of the item.Thanks