PreSonus Eris Sub 8BT studio subwooferIntroducing the PreSonus Eris Sub 8BT studio subwoofer Adding the Eris 8BT subwoofer to your full range speakers enables you to hear the low frequency foundation of your mixes with far more accuracy, so you can make the right decisions and create better, more translatable mixes. That's why this subwoofer is a must have for EDM and hip hop producers in particular. The amazingly loud, 100 watt Eris 8BT drops down to a molar rattling 30 Hz, so you'll