Audiophile grade sound. Attractive, compact and big sound. Deliver spacious, punchy sound from a small enclosure, the MM-5 features a powerful 100 watts per speaker Class AB bi-amplification system that drives an AMT ribbon tweeter and a 5.25in polypropylene, ultra stiff woofer. Outfitted with a slotted rear bass port, the MM-5R is able to deliver bass that belies its diminutive size, all the way down 42Hz. Enjoy fantastic dynamics, smooth midrange, and punchy bass combined with sonic imaging usually only found in audiophile grade speakers at a much higher price. Bluetooth 5, Qualcomm aptX HD. Wireless technology, hi-resolution audio transmission. The Qualcomm aptX HD audio codec ensures your Bluetooth wireless enabled device can deliver high definition audio. It preserves sound data through the audio transmission, resulting in a better than CD listening experience. With aptX HD, you can enjoy listening to your music at the highest audio quality when using an aptX HD enabled