- Valcom Signature Series 2x2 One-Way High Fidelity Lay-In Ceiling Speaker - Quickly replaces a 2' x 2' or 1/2 of a 2' x 4' ceiling tile (trim bar included) - No cutting tiles no broken tiles no mess - Excellent music and voice quality - Inconspicuous front accessible volume control - Integral backbox meets or exceeds ASTM E84 flame & smoke test with 3 hour burn rating - Durable white acrylic baked enamel finish - High-fidelity 6 watt built-in amplifier - Affordable - UL Approved - White - VALCOM POWER UNITS (-4)