Bose

Bose 251

Impedance: 8 Ohms.
Power Handling: Compatible with amplifiers and receivers rated from 10 to 200 watts per channel.
Environmental Protection: Engineered to withstand extreme weather, including snow, rain, salt, and temperatures ranging from -40°F (-40°C) to 158°F (70°C).
Driver Configuration:
One 5.25" woofer in a multi-chambered bass enclosure for deep low frequencies.
Two 2.5" Twiddler drivers in an "Articulated Array" for a wide sound field.
Installation: Includes weather-resistant mounting brackets and hardware for wall-mount installation.
Physical Dimensions: Each speaker measures approximately 13.5" H x 5.75" W x 8" D

DesignMax DM2C

Transducer: Features a single 2.25-inch full-range driver.
Frequency Range: Operates between 85 Hz and 19 kHz (-10 dB).
Coverage: Provides a wide 180° conical dispersion (or 150° depending on the specific frequency measurement), ensuring consistent sound distribution throughout a room.
Power Handling: Supports 20W long-term continuous power and 80W peak at 16 ohms.

FreeSpace 360P
Driver: Features a single 4.5-inch (114 mm) advanced composite environmental driver that is downward-firing to protect it from the elements.
Frequency Range: Delivers a frequency response of 70 Hz to 10 kHz (+/-3 dB) and can reach as low as 60 Hz (-10 dB) for enhanced bass performance.
Power Handling:
70/100V Mode: Supports multi-tap settings at 10W, 20W, 40W, and 80W.
Low Impedance: 80W long-term continuous and 320W peak.
Durability: Built with a glass-reinforced polypropylene enclosure that is IP55-rated. It is designed to withstand extreme temperatures ranging from -40°F to 158°F (-40°C to 70°C) and is resistant to sand, snow, rain, and salt fog.
Installation: Can be mounted in-ground or on a hard surface using three #10 (M4) holes in the base. 

FreeSpace FS2C

Audio Performance: According to Bose Professional, it features a 2.25-inch full-range driver that covers a frequency range of 83 Hz to 19 kHz.
Coverage: It offers a wide 150° conical coverage pattern (or up to 180° nominal coverage depending on the environment) to ensure consistent sound throughout a room.
Power and Impedance: It is a 16-ohm loudspeaker that handles 16W RMS (80W peak) and includes a multi-tap transformer for 70V/100V operation.
Safety Certifications: The unit is UL 1480A-certified and compliant with UL 2043 for use in plenum-space installations and fire alarm signaling systems.
Installation: It features Euroblock inputs and front-baffle connectors for easier wiring during installation.

FreeSpace FS4CE

Transducer: Single 4.5-inch full-range driver.
Frequency Range: 70 Hz to 17 kHz (-10 dB).
Power Handling: 40W–50W (RMS/Continuous) and up to 200W (Peak).
Nominal Coverage: Wide 145° conical pattern (though some technical sheets list 115°).
Maximum SPL: 105 dB (Continuous) and 111 dB (Peak).