The Kanto TUK Premium Powered Speakers are designed to deliver exceptional audio performance and versatility. Featuring high performance AMT tweeters and 5.25 inch aluminum drivers TUK produces sparkling highs and rich bass bringing life to all your source material. Fine tuned with onboard DSP these speakers offer an active crossover that filters out sub 80Hz frequencies when connected to a subwoofer further improving low end resolution. Connectivity options include Bluetooth® 4.2 with Qualcomm® aptX™ HD and AAC codecs a built in USB DAC dedicated phono pre amp RCA input RCA input and Optical (TOSLINK) providing the flexibility you need to enjoy all your devices. Additional features include a headphone output subwoofer output and a USB charge port (5V 2A).