Mackie has over 20 years of experience in designing true reference monitors, and it shows. Their Creative Reference series Multimedia Monitors deliver extraordinary functionality with high-quality components in a small-footprint, affordable form factor. The Mackie CR4BT 4″ Creative Reference Multimedia Monitors with Bluetooth pump out 50W of clean stereo sound from two 4″ woofers and two ferrofluid-cooled 0.75″ silk tweeters, and they have a broad frequency response range of 70Hz–20KHz. You can plug your smartphone or another audio source directly into the font-panel 1/8″ TRS input or connect via Bluetooth and listen by headphones through the front-facing headphone jack, which automatically defeats the speaker output when employed. Audiophiles and engineers at Sweetwater love the sound quality that comes from CR4BTs’ birch cabinet construction and custom-tuned rear bass ports — not to mention the included acoustic isolation pads!