Thank you for viewing this product from among many others. This time, I am listing: FX-AUDIO- 501J Monaural Amplifier x 2, Adapter, and Petit Susie Thank you for looking. ★★★Price Reduced★★★ This is a listing for two FX-AUDIO- 501J monaural amplifiers. I am selling them because I am replacing my equipment. They are fully functional. As a bonus, I will include two FX-AUDIO- DC power noise cleaners/noise filters, "Petit Susie." Power adapter included! [Features of the FX-AUDIO- 501J Product] ■ Maximum 100W output monaural power amplifier By driving the TPA3118 digital power amplifier IC in Parallel BTL mode, it achieves a maximum driving force of 100W. This monaural power amplifier prioritizes sound quality and power by eliminating the volume adjustment mechanism, which is a factor in sound quality degradation. ■ Gain Setting A gain setting switch is provided on the front of the unit, allowing for 4-step output level settings. The gain control is not the conventional attenuator type, but rather uses a digital amplifier IC parameter change method controlled by an MCU, resulting in a high-quality sound design that is not affected by the sound quality degradation of resistor components. Gain settings (20/26/32/36dB) [FX-AUDIO- 501J Product Specifications] Color: Black Input Terminals: RCA terminals, monaural/stereo (MIX) Output Terminals: 1ch monaural speaker output (gold-plated speaker terminals compatible with banana plugs) Maximum Output: 100W / Compatible Speakers: 4Ω～16Ω Power Supply: DC12～24V, power capacity 2A or more (4A or more recommended) Functions: Gain setting function (20/26/32/36dB), stereo-to-monaural conversion function Size: Height 33mm x Width 98mm x Depth 123mm Weight: 370g I will send it after a simple cleaning. Although it is a used item, there are no noticeable scratches. How about this opportunity? Thank you in advance.