・This is an ONKYO A-933(S) integrated amplifier. ・I believe it's the final model in the INTEC275 series. The list price was 80,000 yen, which was 30,000 yen more expensive than the full-size A-973 amplifier released at the same time. ・Upon opening it, I believe it has a rather elaborate construction, with two large transformers, which is unusual for an amplifier of this size, where you'd typically find only one. ・It's also heavier than the full-size A-973. ・For this listing, I've cleaned the interior and exterior, and repainted the chassis. ・Also, the rear terminals were tarnished and difficult to insert plugs into, so I polished them one by one. I didn't polish them too hard to avoid removing the gold plating, so they're only moderately polished. ・Sound output from all inputs, including the PHONO terminal, as well as sound output from speakers A and B, and the subwoofer, are all good. ・I've confirmed it works well even after extended use. ・Tone control, Bass, and Super Bass functions are also normal, allowing you to enjoy powerful sound. ・Regarding SUPER BASS: ・BASS is a function that increases or decreases the 100Hz frequency, while SUPER BASS is a function that amplifies the 80Hz frequency by +10dB. ・When the 100Hz and 80Hz frequencies are mixed, the 80Hz sound is difficult to hear with regular speakers. ・I have confirmed the SUPER BASS function using a built-in subwoofer. ・I recommend using a built-in subwoofer to fully utilize the SUPER BASS function. ・Included accessories are the standard RC-613S remote control. The surface is relatively clean, but there are some scratches on the back. ・There are some scratches due to it being a used item. Please refer to the photos in the latter half of the listing. ・I am also listing this on other sites, so please leave a comment before purchasing.