This Alesis RA-100 amp is in good overall cosmetic condition, please check the photos for actual condition. It is usually used for studio reference monitors but it can power up stage speakers also. There are scratches on the chassis . Both of the channels are working properly. The pots/jacks were just cleaned.
Specifications

Power output: 75 watts per channel into 8Ω (stereo)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.05%

Damping factor: 200

Input sensitivity: 0.5V

Signal to noise ratio: 100dB

Dimensions: 19 x 3.5 x 8 inches