Car Audio & Video. Package: Pair of Rockville APM8B 8 2-Way 500 Watt Powered USB Studio Monitor Speakers in Black. Condition: BRAND NEW IN ORIGINAL PACKAGING. (1) Pair of Rockville APM8B 8 500W Active/Powered USB Studio Monitor Speakers. The Rockville APM8 Active Studio Monitor Comes in Pairs and each monitor is bi-amped. What this means […]... Read More