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RCF - ST Series 15-SMA - Active Stage Monitor Speaker (Single) is available to buy in increments of 1

RCF - ST Series 15-SMA - Active Stage Monitor Speaker (Single)


RCF - ST Series 15-SMA - Active Stage Monitor Speaker (Single)
RCF - ST Series 15-SMA - Active Stage Monitor Speaker (Single) RCF - ST Series 15-SMA - Active Stage Monitor Speaker (Single) RCF - ST Series 15-SMA - Active Stage Monitor Speaker (Single) RCF - ST Series 15-SMA - Active Stage Monitor Speaker (Single) RCF - ST Series 15-SMA - Active Stage Monitor Speaker (Single) RCF - ST Series 15-SMA - Active Stage Monitor Speaker (Single) RCF - ST Series 15-SMA - Active Stage Monitor Speaker (Single) RCF - ST Series 15-SMA - Active Stage Monitor Speaker (Single) RCF - ST Series 15-SMA - Active Stage Monitor Speaker (Single) RCF - ST Series 15-SMA - Active Stage Monitor Speaker (Single)

RCF - ST Series 15-SMA - Active Stage Monitor Speaker (Single) 

The ST Series - a new line of active loudspeakers specifically designed to be the everyday monitoring tool for rental companies and professional musicians. With its ultra compact design and choice of formats, together with high output levels, ST Series is the answer to a widevariety of production requirements. The 15-SMA is easy to use and versatile: for every rental company, musician, venue andaudio/visual provider, this high-performance self-powered speaker system offers a degree of simplicity unmatched by traditional amp and speaker PA systems.

The ST Series is a practical solution for high intelligibility speech and audio applications, covering infill or delay, production studios, presentations and high power music sound reinforcement with or without subwoofers. A key requirement for everyday audio systems, delivering simple ‘plug and play’ solutions, without compromising performance and portability. Legendary RCF transducer technology coupled with state of the art digital amplification topology resulting in a perfectly optimised loudspeaker series. The ST Series provides high end audio coverage even at extreme sound pressure levels, unmatched reliability and
acoustic compatibility across the whole series.

The ST Series monitoring systems feature professional RCF transducers in order to guarantee a better performance and great vocal reproduction. All Compression drivers and woofers are precision built taking advantage of RCF’s superior moulding, assembly technologies and a wealth of professional knowledge and experience dedicated to achieve extremely high standards.

All ST Series two-way speakers are equipped with a new generation Digital Amplifier. The result of this is very high output, extremely low distortion and an incredible natural sound. Each amplifier presents both XLR and jack inputs, XLR output link, volume, EQ Mode (FLAT/BOOST), MIC/LINE sensitivity switch, VDE input connector.The amplifier features a solid mechanical aluminium structure which not only stabilizes the amplifier during transportation but also assists in the heat dissipation.

The new loudspeaker design looks aggressive whilst retaining familiar ergonomics and is the result of extensive combined functional and acoustic research.The ST coaxial system cabinets are manufactured in Baltic birch plywood and they are designed to dampen down vibrations even at maximum volume settings. The reflex porting has been designed to offer a great efficiency in the bass vocal range.The models are equipped with a side handle with rubber handgrip for greater portability; a special side design of the cabinet helps the precise repositioning of themonitor on the stage.A rugged steel pole mount has been installed on a side; in combination with the FREEFIELD equalisation gives the possibility to use the monitor in a pole stand configuration.

The speaker itself, features a 15" high-power woofer, 2.5’’ voice coil, delivering accurate bass and precise low-frequency control, making it a suitable stage monitor/speaker for personal use and small bands. The custom-made compression driver ensures a transparent midrange and extreme accuracy. It features a high-performance 1” exit throat and 1.4’’ voice coil, with a frequency range up to 20 kHz. A particularly resistant kind of polyimide is used for the diaphragm and suspension, in order to increase the driver’s mechanical strength and stability.

The two-way speakers are equipped with a digital amplifier, resulting in very high output, extremely low distortion, and natural sound. The amplifier section features an 800W switching power-supply module that can be distributed to the two final amplifier sections. Each amplifier section has a maximum output power capability in order to provide, when necessary, maximum output bursts in a specific frequency range.

The amplifier consists of XLR and jack inputs, a XLR output link, volume, EQ mode (flat/boost) and a mic/line sensitivity switch, in addition to a VDE input connector. It features a solid mechanical aluminum structure which not only increases the amplifier’s stability during transportation, but also helps in heat dissipation. The integrated DSP manages crossover, equalization, soft limiter, compressor, and dynamic bass boost. With an easy 90° rotation and a simple click on the flat/boost switch, the ST 15-SMA turns into a loudspeaker, with the equalization settings in boost mode.


  • 800W peak, 400W RMS 
  • 131 dB dB max SPL 
  • 45 Hz to 20 kHz frequency response 
  • 15" woofer, 2.5" voice coil 
  • 1" driver, 1.4" voice coil 
  • Provides a clear reproduction of midrange frequencies, with a specific focus on the voice 
  • Features RCF transducers that ensure vocal reproduction



Frequency Response
        -3 dB: 45 to 20 Hz
        Maximum SPL @ 1m 131 dB

        Horizontal: 90°
        Vertical: 60°

Compression Driver
        1", 1.4" voice coil
        Woofer 15", 2.5" voice coil

        Input Signal

Input Connectors
        Jack to XLR (male)

Output Connectors
        XLR (female)


Crossover Frequencies
        1400 Hz

        RMS Limiter, HF

        Fast Limiter


Total Power
        1200 W Peak

        High: 400 W Peak
        Low: 800 W Peak

Total Power
        600 W RMS


        Baltic Birch Plywood


Pole/Mount Cap

Physical Attributes:

        14.3" x 26.5" x 19.0" (36.3cm x 67.3cm x 48.3cm)

        46lbs (21kg)

Shipping Details:

        31.6" x 15.9" x 19" (80.2cm x 40.2cm x 48.2cm)
        47.9lbs (21.7kg)

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