Polk Mm1242Dvc MM1 12 Dual Voice Coil Subwoofer (Polk Mm1242Dvc) Studiograde accuracy upgrade for premium sound. Precision bass design for advanced performance. Dynamic Balance tech ensures clean, fullrange sound. Highexcursion motor for enhanced bass depth and clarity. Overview The MM1 upgrade provides studiograde accuracy and advanced bass engineering for exceptional audio quality. Dynamic Balance technology eliminates distortion, while the high excursion motor enhances bass depth. Please note that bulky deliveries over 5kg and in a few areas where it is not possible to redirect to the post office, the parcel may be held at the local courier depot instead. Where possible, our warehouse will try and use recycled cartons for our deliveries, just as safe and sturdy as a new carton but more friendly to the environment. Opened and Used items are subject to approval depending on the condition of the unit and packaging. Any product returned with damage to the product, packaging, or removal of any bar code or manufacturer's label will be rejected and returned at the customer's cost. Return requests for commercial quantities must be approved casebycase and may be subject to additional conditions. Goods should be received at the warehouse within 2 weeks from the Approved return authorisation unless previously arranged.