These can be used singularly in stereo mode or if you have another as a pair of mono blocks , switch for mono stereo on bottom. Good condition. Not used much. 1 hour a day for two weeks tops . These are 99 quid on Amazon but you get a 36v PSU . The 48V power supply unlocks the TI TPA3255 chip's maximum power and dynamic headroom. This one has the 48v PSU. Original Box etc . Good order , possible minor marks etc from handling and connecting stuff.
eBay