Released December 2013 Monthly Stereo Magazine Supplement Luxman Digital Amplifier Kit 12W x 12W (8Ω) 1200mA Kyoritsu Electronics Exterior Kit It was assembled, but for this listing, I connected it to an 18cm woofer 2-way speaker and confirmed the on/off function, the effectiveness of the volume control, and clear output from both left and right channels without any distortion.