General
Model	SC-120 C
Rated/programmed power	20 W
Maximum power	40 W
Power taps (100 V)	20 W / 10 W / 5 W
Frequency response (±10 dB)	35 – 20.000 Hz
Sound pressure (1 W / 1 m)	92 dB
Max. sound pressure level (SPL Pmax / 1 m)	106 dB
Beam angle (-6 dB)	180° / 80° / 110° at 1 / 4 / 8 kHz
Speaker diameter	165 mm
Impedance	8 Ohm
Speaker type	2-way coaxial chassis
Side length	220 mm
Built-in depth	70 mm
Colour	White
Mounting technique	Quick-release fastener
Safety feature	Anti-theft construction

The SC-120 C from RCS Audio-Systems is a professional ceiling-mounted speaker of premium class, designed for use in architecturally demanding or security-critical rooms such as conference halls, foyers, or sales areas. It features a 2-way coaxial chassis with an integrated tweeter system, enabling a wide frequency response from 35 Hz to 20,000 Hz. The combination of high-quality components and a discreet front design with only approximately 2 mm visible edge ensures seamless integration into ceiling structures. Installation is tool-free using a quick-tension locking system, where after removing the stable, coated perforated sheet, four screws are tightened, ensuring secure and easy installation.

Applications primarily include indoor spaces requiring discreet yet powerful sound coverage. The speaker is suitable for both voice transmission and music playback, with high power handling up to 40 W (program power) enabling sufficient loudness for larger rooms. The 100-V technology with three power taps (20 W, 10 W, 5 W) allows flexible integration into professional ELA systems operated via a central amplifier with high voltage. This is particularly common in buildings with multiple speakers, where central control and power distribution are required.

Functions and equipment in detail include a 2-way coaxial chassis with a 165 mm speaker and an impedance of 8 Ohm. The frequency response (±10 dB) ranges from 35 Hz to 20,000 Hz, enabling clear reproduction in the low bass range and precise representation in the high-frequency range. The sound pressure level is 92 dB at 1 W/1 m, with a maximum sound pressure level (SPL Pmax) of 106 dB measured at 6 kHz. The radiation angles are 180° at 1 kHz, 80° at 4 kHz, and 110° at 8 kHz, ensuring even sound distribution in the room. The anti-theft construction provides additional security, especially in public or commercial spaces.

Technology explained simply refers to 100-V technology, which enables multiple speakers to be powered via a single cable network with high voltage, minimizing losses over long distances. The power taps allow the speaker to be adapted to different systems depending on the required volume. The quick-tension locking system reduces installation time and reduces the need for special tools. The coaxial chassis ensures that mid and high-frequency drivers are positioned in a common axis, enabling more precise sound reproduction and better sound localization.

Compatibility and accessories include use with matching installation frames for wall- and ceiling-mounted speakers from the SC-110/120 C series. These frames support installation and ensure a clean fit in the ceiling. Compatibility with ELA systems is provided by the 100-V technology, with exact integration depending on the amplifier system used.

Installation and mounting is done by tightening four screws after removing the perforated sheet. The installation depth is 70 mm, and the side length is 220 mm, which must be considered during ceiling structure planning. The white color of the speaker ensures an unobtrusive appearance that harmonizes with most indoor environments.

Operational advantages include high sound quality, flexible power adjustment via 100-V technology, tool-free installation, and anti-theft construction. The combination of robust design and high power handling makes the SC-120 C a reliable solution for professional sound systems.