Float QA power supply active Transdyn. This is the perfect all in one solution. With a built in main amplifier plus volume control plus Transdyn system. Just connect a fixed line signal and you are ready to use the Float`s. If you want also to use a pair of speakers, electrostatics or dynamic ones, just connect them to the speaker terminals on the rear. There is a switch on the front panel where you can select if the Float`s or speakers are in use.