https://www.rockvilleaudio.com/studio-monitors/
https://www.rockvilleaudio.com/asm5/
Rockville ASM5 5" 2-Way 200W Active/Powered USB Studio Monitor Speakers Pair
$109.95
https://cdn2.bigcommerce.com/n-nr1m3w/reotp/products/521/images/172133/849991__76817.1500077339.600.600.jpg
https://cdn2.bigcommerce.com/n-nr1m3w/reotp/products/521/images/172135/849992__62366.1500077344.600.600.jpg

https://www.rockvilleaudio.com/apm5b/
Rockville APM5B 5.25" 2-Way 250W Active/Powered USB Studio Monitor Speakers Pair
$114.95
https://cdn2.bigcommerce.com/n-nr1m3w/reotp/products/5222/images/229066/1350882__83365.1505916485.600.600.jpg
https://cdn2.bigcommerce.com/n-nr1m3w/reotp/products/5222/images/229067/1350883__25328.1505916488.600.600.jpg

USB入力ありで安価な5inchウーファ搭載製品。
発送地域にJAPANあり。