For larger venues such as stadiums and outdoor music festivals, or for music genres that use bass instruments with an extended lower range and high stage volumes, bass players often use a more powerful amplifier (300 to 2000 watts or more) and one or more separate speaker cabinets (or "cabs") in various combinations, called a "bass stack". An example of the powerful, loud bass amplifier systems used in grunge is Alice in Chains bassist Mike Inez's setup. He uses four Ampeg SVT-2PRO amplifier heads, two of them plugged into four 1x18" subwoofer cabinets for the low register, and the other two plugged into two 8x10" cabinets.