Assertion: subwoofer's speaker | /r/HasProperty | left
Facets:
Source sentences:
text: For those not familiar with the Home Theater concept, it requires a big-screen TV (or wall screen if you use a projector); at least five speakers (front left, front right, center, left rear and right rear) or seven if you want to do it right (the extra two are left surround and right surround.)
text: Multiple Variable Crossover: There exist a few companies that offer the ability to set a different crossover frequency for multiple speakers (front, center, and rear, for instance.