Are you looking for professional-quality bookshelf speakers that can fill a room? Then take a hard look at these Edifier® Professional Bookshelf Speakers. With 4 driver units, these speakers can produce 42 watts (RMS) output power, best fitting any space in your house for a great listening experience. These speakers use an active/passive system with a speaker cable connecting the 2. With the enrichment of 2-way active crossover control and the enhancement of its Class-D amplifier, this product is tuned to satisfy your pursuit of quality sound. Two 4-in. mid-range/bass drivers create rich mids and lows. Meanwhile, two 1-in. silk diaphragm treble drivers produce crisp highs. Bluetooth v5.1 features strong resolution, stable transmission, low power consumption, and wide purpose of use, delivering high-quality audio experience. The active speaker also has dual RCA, coaxial, and optical ports so you can connect multiple devices. And you can use the included remote and the knobs on the active speaker's right panel for easy control of all functions. Finally, the quality wooden enclosures minimize acoustic resonance and further reduce distortion. The classic design complements any home decor as well.