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Coastal Source SAS600/4-SPR-C4 Outdoor amplifier/enclosure for Sonos Port, preconfigured to bi-amp a Coastal Source 2.2 speaker system at Crutchfield
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Turn any hifi speakers into bi-amped Sonos speakers (with optional sub) by hacking Ikea Symfonisk - YouTube
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Speaker Cables – bi-wire or single wire? And what about bi-amping? | HFA - The Independent Source for Audio Equipment Reviews
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