Technical data
Radiation angle (-6dB, 1/4/8 kHz)	180°/ 100°/ 45°
Colour	White
Frequency range (±10dB)	75 - 18.500 Hz
Impedance	8 Ohm
Speaker diameter	130 mm
Sound pressure level (SPL) 1 W/1 m	91,5 dB
Rated load capacity (program)	4 (6) W
Dimensions Ø	200 mm
Mounting depth (max.)	66 mm
Sound pressure level (SPL) Pmax/1 m	98 dB @3kHz
Shape	Round
Adjustments at 100 V	4/ 2/ 1 W

The RC-104 from RCS Audio-Systems is a ceiling and wall-mounted speaker with a rated power of 4 W (program power 6 W) and is designed for use in 100-V amplifier systems. It features a broadband chassis with integrated tweeter cone and is available in white. The device is characterised by a discreet design with a frame height of approximately 2 mm, enabling unobtrusive integration into ceilings and walls. Installation is carried out using a quick-tension fastening system, which allows mounting and dismounting by tightening four screws accessible after lifting the mounting plate. The mounting frame is made of high-quality plastic, while the mounting plate is made of coated steel. The construction is designed to be theft-secure.

Applications

The speaker is intended for indoor use, particularly in offices, waiting areas, shops or other rooms where unobtrusive, uniform sound coverage is required. With dimensions of 200 mm Ø and a maximum installation depth of 66 mm, it can be installed in standard ceiling constructions, including plasterboard ceilings. The mounting cutout measures Ø 170 mm ± 5 mm.

Functions and Equipment in Detail

The device features a broadband chassis with tweeter cone Ø 130 mm, ensuring clear and balanced sound over a wide frequency range. The rated impedance is 8 Ohm, enabling standard matching to amplifiers and distributors. The adjustments at 100 V are 4/2/1 W, allowing flexible use at different power levels within a 100-V system. The rated power handling (program) is 4 (6) W, where the values in parentheses represent maximum music power.

Technology Explained Simply

The speaker operates with a 100-V transformer, which steps down the high voltage from the distributor to the rated impedance of the speaker. This enables safe and efficient distribution of audio power over long cable runs. The frequency range (±10 dB) is 75 – 18,500 Hz, ensuring good reproduction of low to high tones. The sound pressure level at 1 W/1 m is 91.5 dB, providing sufficient loudness for indoor spaces. At maximum power (Pmax), the speaker reaches a sound pressure level of 98 dB at 3 kHz. The radiation angles (-6 dB) are 180°/100°/45° at 1/4/8 kHz, enabling broad yet controlled radiation in the mid- and high-frequency range.

Compatibility and Accessories

The RC-104 is compatible with 100-V amplifier systems and can be integrated into existing installations. A moisture-resistant version is optionally available (option FI-100), equipped with a specially treated chassis and a matching transformer. This variant is suitable for rooms with increased humidity, such as bathrooms or kitchens. Custom painting is available upon request.

Installation and Mounting

Mounting is performed by tightening four screws, accessible after lifting the mounting plate. The quick-tension fastening system adapts to different ceiling thicknesses and is suitable for plasterboard ceilings. The maximum installation depth of 66 mm allows installation in standard ceilings. The mounting plate is removable and made of coated steel.

Operational Advantages

The speaker offers simple, secure and theft-secure mounting. The discreet design with low frame height ensures unobtrusive integration. The 100-V technology enables flexible and scalable sound coverage, with adjustments of 4/2/1 W allowing flexible power control within the system. The high frequency limit of 18,500 Hz ensures clear reproduction of high frequencies. The maximum sound pressure level of 98 dB at 3 kHz is sufficient for typical indoor applications.