ONKYO Integra A-817EX Integrated Amplifier Sound output confirmed Crackling present AC power cable included [As is] ■【Original Price: ¥79,800, 1988】 ■Stereo integrated amplifier employing an optical drive system. The power amplifier section utilizes a newly developed optical drive system. In this system, the reference current of the first-stage differential amplification circuit is obtained from a photovoltaic element that generates a constant voltage when illuminated by light, enabling high-precision V→I conversion by obtaining a more accurate reference current than conventional methods. To prevent the intrusion of magnetic flux from the power supply into the amplification circuit, the power supply block is separated from other circuits, and a complete two-box structure is realized with an independent top cover. The two top covers are firmly attached with six φ4mm screws each, suppressing the generation of vibrations caused by sound pressure. Furthermore, the amplifier block is divided into a closed-loop current amplification stage and a driver voltage amplification stage, which are shielded separately with an enclosure-type large heat sink and barriers, cutting off electromagnetic coupling. ■Rated Output: (20Hz～20kHz, CD→sp out, both channels driven) 120W+120W (6Ω) 105W+105W (8Ω) ■Dynamic Power: 295W+295W (2Ω) 235W+235W (4Ω) 190W+190W (6Ω) ■External Dimensions: Width 435 x Height 168 x Depth 392mm ■Weight: 20.3kg ■■This product can be purchased immediately without a comment. ■■It can be purchased without comment. ■■Foreigners in particular should carefully read the product description before purchasing.