This is a 462 Sonic Maximizer equipped with a BBE sound processor. Even people working in the music industry often use small speaker systems at home due to space constraints or soundproofing issues. This maximizer is helpful in such situations. It clarifies the contours of the sound, even at low volumes, and allows you to adjust the instruments you want to bring forward. It can also make the bass sound more audible. By increasing the harmonics of the bass, it feels like you can hear the bass better. The actual low frequencies cannot be reproduced by small speakers, but by increasing the harmonics, the human brain is tricked into hearing the bass more clearly. Using a subwoofer can easily lead to sound leakage issues, but with the maximizer, you can hear the bass even without actual low frequencies. This is a used item. There are many scratches and stains, but there are no issues with functionality or performance. One of the rubber feet on the back is missing. It is a 100V specification for use in Japan. Inputs and outputs are RCA and phone jacks. The key is to apply it lightly. Thank you for viewing. #Maximizer #Enhancer #Exciter #BBE