Check the listing for details. HK Audio POLAR 12 MK2. Condition: New. Listed at 1399.00 USD. Its sleek, durable aluminum housing and flexible 4-channel mixer make it ideal for weddings, clubs, schools, churches, and more. The aluminum mid/high column includes six 3" drivers and a 1" compression driver in a constant directivity horn, providing 120° x 30° coverage for clean, balanced sound.