Assertion: amplifier | /r/Synonym | a bass stack
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Source sentences:
text: 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".