The LC3‑UC06 is a general purpose, cost-effective 6 W ceiling loudspeaker, suitable for 100 V connection with power tapping of: 6, 3 and 1.5 Watt. The LC3‑UC06‑LZ is a low impedance (4 Ohm) version ceiling loudspeaker for direct connection to a low impedance amplifier output. The optional back‑box LC3‑CBB fully protects the loudspeaker from dust, falling objects and prevents sound traveling via the ceiling cavity to adjacent areas. The loudspeaker frame, grill and back‑box are manufactured from self‑extinguishing ABS according to UL 94V0. Certifications and approvals All Bosch loudspeakers are designed to withstand operating at their rated power for 100 continuous hours in accordance with IEC 268‑5 Power Handling Capacity (PHC) standards. Bosch has also developed the Simulated Acoustical Feedback Exposure (SAFE) test to demonstrate that they can withstand two times their rated power for short durations. This ensures improved reliability under extreme conditions, leading to higher customer satisfaction, longer operating life, and lessens the chance of failure or performance deterioration. u Suitable for speech and music reproduction u Light weight ABS material u Easy to install u Optional back-box u Unobtrusive design CE Declaration of Conformity Safety According to EN 60065 Region Regulatory compliance/quality marks Europe CE Installation/configuration notes Installation is easy with integral spring arms that securely hold the ceiling loudspeaker in its cut‑out. Ceilings from 5 to 25 mm thick can be accommodated. A template is also provided for accurately marking the cut-out in ceiling panels. The electrical connection is by means of flying leads, with each color connected to a different primary tap of the matching transformer. Three primary taps for 100 V are provided on the matching transformer to allow selection of nominal full‑power, half‑power and quarter‑power. The optional back‑box (LC3‑CBB) protects the rear of the loudspeaker from dust, falling objects, makes the unit vermin proof and prevents sound traveling via the ceiling cavity to adjacent areas.