The SuperZero 2.1 is a true high-end mini-monitor that builds on the merits of its predecessors through the addition of a 2nd order crossover and a newly revised woofer The SuperZero 2.1 is small speaker, at just 9″ tall x 5″ wide x 5.5″ deep, that achieves its lifelike mid-range and high frequencies through acoustic suspension technology

https://www.amazon.com/NHT-SuperZero-2-1-Mini-Monitor-Speaker/dp/B00CKNOYWK