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Contrabass Series RRI 21s MK2
High-Performance Dual 21-Inch Infra Subwoofer for Nightclubs, Concerts & Demanding Professional Audio Systems
The CSC Audio Contrabass RRI 21s MK2 is a high-performance dual 21-inch infra subwoofer engineered for demanding professional audio systems. With two 21-inch low-frequency drivers, 2,800 watts AES power and extended response down to 29 Hz, it is designed to deliver deep, controlled and high-impact bass for high-energy environments.
The CSC Maestro MS 26 controller is configured to perform with its pre-loaded EQ and limiter functions. RR 15h, RR 212h MK3, RR 212 hl MK1, RRH 218s and RR 218s are all perfectly matched with the RRI 21s MK2.
The RRI 21s MK2 can also be retrofitted into existing venues and is equipped with rubber feet and Top Hat fittings for practical system deployment. When combined with compatible CSC Audio mid-high systems and the Maestro MS 26 controller, it forms part of a complete professional audio system designed for powerful, extended low-frequency performance.
FEATURES AND APPLICATIONS
Key Features
- High-performance dual 21" infra subwoofer
- Easy to install
- Can be retrofitted into existing venues
- Top Hat
- Rubber feet
Applications
- Large concerts and live performances
- Night clubs
Technical Specification
| MODEL | RRl 21s MK2 |
|---|---|
| Type | Reflex Loaded Subwoofer |
| Frequency Response | 29 Hz-120 Hz ± 3 dB |
| Drivers | LF: 2 x 21" (525 mm) with a 4" (100 mm) voice coil |
| Recommended Amplifier Upto | 4000 watts |
| Sensitivity (1 W / 1 m) | 99 dB |
| Maximum SPL (9) | 133 dB continuous, 139 dB Max |
| Nominal Impedance | 4 ohms |
| Dispersion | Omni |
| Crossover | LPF 60 Hz |
| Enclosure | Baltic birch ply |
| Finish | Non-toxic Textured black paint |
| Protective Grill | Perforated steel |
| Connectors | 2 x Neutrik NL8 |
| Pin Connections | Input: ± 1, Link through: ± 2 |
| Standard Colour | Black |
| Fittings | Rubber feet, Top hat |
| Horn | NA |
| Nominal/ AES Power | 2800 watts |
| Max/ Continuous/ Program Power | 5600 watts |
| Peak Power | 10,000 watts |
| Accessories | Castors, Felted waterproof covers, Speaker poles |
| Dimensions - Product (in mm) | (W) 1182 x (H) 681 x (D) 998 |
| Dimensions - Including packing (in mm) | (W) 1230 x (H) 730 x (D) 1070 |
| Net Weight (kgs) | 114 |
| Shipping Weight (kgs) | 130 |
About Series
The Contrabass Series products capture the bold and dynamic characteristics of the contrabass. Choose between a Reflex, Multiload, or a bandpass; the Contrabass Series has it all. The aim is to deliver deep, impactful bass that defines the lower frequency extension of the audio spectrum, making them ideal for both live sound and installation applications. Engineered to ensure minimum cabinet resonance, they disappear in a venue and are in different shapes and sizes that fit under a stairway, stand next to a column, or simply can be slipped under a stage without losing the high-impact performance. These subwoofers enhance low-frequency extension and overall audio presence, making them perfect for high-energy environments. These are ideally paired with the Cello and String Series mid-highs. Choose from our range of Contrabass and String series subwoofers to play, hear, and feel the music.
