Proficient Audio Proficient BB-C650 Metal Back Box

The BB-C650 is a back box, designed specifically to enhance the speakers performance. It utilizes

Proficient Audio Proficient BB-C650 Metal Back Box

The BB-C650 is a back box, designed specifically to enhance the speakers performance. It utilizes the ideal air volume for the speaker, and acts as a sound chamber, directing the critical sound to the sweet spot. It also reduces the sound going to other rooms/floors up to 10db, and provides one hour fire break protection.One metal back box for C650 and C660 LCR ceiling speakers and C605, C610, C620, C640, C645 and C600TT ceiling speakers

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