Check the listing for details. AudioSource AMP 100 2-Channel Stereo Power Amplifier Tested Working. Condition: Used. Listed at 73.96 USD. this auction is ONE AudioSource AMP 100 2-Channel Stereo Power Amplifier i have around 80 units available. these are not refurbished/repaired electronics. 98% of the units are fully functional. i will be testing each unit again prior to shipping. some units are dirty and i may have to open them to clean inside. PLEASE DO NOT MAKE A PURCHASE IF YOUR INTENTIONS ARE TO TRY IT OUT AND RETURN ITeach unit will have a security sticker on the top side case cover screw to prevent those who like to swap parts absolutely no refund or exchange will be accepted because each unit will be send to you in 100% working orderi always package extremely well to prevent any damages during shipping some units have goodish colour knobs, some black. i will randomly pick one and ship it these units have various cosmetic defects such a scratches/nicks/scuff marks. most seems never used or probably used as backup if needed. most units have a sticker on them. i will remove the sticker and clean the sticker residue, there might be a slight imprint of the sticker on the unit. i will randomly pick one and ship it I DO NOT TAKE OFFERS