This is a set of the DENON PMA-50 and NHT SUPER ZERO speakers. I mainly use it with Bluetooth. It is currently in active use. I am selling it because I am replacing my component stereo system. The original speaker boxes are available, but the amplifier box is not, so I will pack it with bubble wrap. The price will be reduced over time, so please refrain from price negotiations. Please understand that this is a used item and that all sales are final (NCNR). Thank you. P.S., Although it doesn't affect functionality, the LCD monitor has become slightly blurred. Please consider this if you are interested. Further P.S., Recently, the sound has become distorted for the first few minutes after turning on the power. This happens when using Bluetooth with Amazon Music. The symptoms appear intermittently, so I don't know the cause, but please understand.