Bose EM180 Black in-ceiling premium loudspeakers feature proprietary Bose PhaseGuide technology with high-frequency compression drivers. Designed to mount near wall-ceiling boundaries, It provide improved audio quality and coverage, while reducing the number of required units. Frequency Response (-3 dB) (1) 50 – 18,000 Hz Power Handling: 600 W and peak 500 W Low Frequency 1x 8-inch woofer, 1.5-in v.c and High Frequency 1x compression driver, 1.3-in v.c Dimensions (H x W x D): 13.4”  x 13.4”  x 9.8” (339 x 339 x 249 mm)

Bose DS 40F White is the most versatile member of the DS loudspeaker family. It is a high performance, full-range, flush mount loudspeaker design for foreground and background music and speech reproduction in a wide range of installed applications. Frequency Response (+/–3 dB): 80 Hz to 17 kHz Nominal Dispersion 125° conical Dimensions: Diameter 300 mm (11.8”) and Depth 153 mm (6.0”)

Bose 3 Series I Black designed to provide surface-mount bass augmentation for new and existing background music systems. Features one 5.25" (133 mm) woofer that delivers deep bass down to 40 Hz without audible distortion. Frequency Response (+/-3 dB): 50 Hz - 230 Hz Long-Term Power Handling: 200 W and 800 W peak Product Dimension(W x D x H): 7.5 " x 13.5 " x 14 "