Product Features  


■   2x 18-inch high-power low-frequency drivers
■ 220mm diameter magnetic coil,  100mm heat-dissipating voice coil  
■ Protected by proven durable Raindrop paint finish   
■   CNC manufactured rectangular housing with tongue and groove joints 

■ Waterproof and dustproof acoustically transparent fabric lining inside grille

Product Overview  

The ST218 extended low-frequency subwoofer is designed and manufactured to deliver accurate and powerful bass frequencies. It is a direct-radiating subwoofer with a large balanced outlet that provides optimal cabinet tuning and uniform air pressure distribution of the driver cone, thereby reducing distortion and extending system life  .  The ST218 is used as a single subwoofer in a subwoofer/satellite system or as multiple subwoofers as part of an expandable large-scale sound reinforcement system with excellent efficiency and control. The subwoofer is stackable. This is the most powerful low-frequency supplement to the CAT KING full-range series speakers. The low-frequency driver is two 18-inch woofers with 4″ (99.6mm) heat-dissipating voice coils and 220mm magnets. Its design is the result of the latest improvements in compact subwoofers, which can reproduce the bass frequency range quickly and controlled.



 

Applications  

Due to their rugged construction, they are ideal for bars, concert halls, nightclubs, road shows and AV rentals

It is recommended to use with XCA series audio processor to obtain the best product performance.

It is recommended to use the MT1400 power amplifier to achieve a more perfect sound field effect.

Technical specifications  

Model Name                                       ST218
product design                            Dual 18-inch subwoofers
product type                            18-inch passive subwoofer
Rated impedance                            4 ohms
Power handling capability: 
Rated power AES (W)                            1400 W
Long-term maximum signal power MUSIC (W)                            2800 W
Short-term peak power PEAK 10ms (W)                            5600 W
Sensitivity                            95dB SPL 1W@1m
Frequency response (+-3dB)                            45 Hz – 180 Hz
Frequency response (+-10dB)                            42 Hz – 220 Hz
Sound pressure level (1M) continuous/maximum dB                            126dB/132dB (calculated)
Driver part
LF low frequency driver:                            LF18220F-100S
LF Size                            450 mm (18 inches)
LF voice coil size                            99.6 mm (4 inches)
LF magnet structure                            220mm Ferrite Coil
LF Frame Material                            Aluminum cone
Shell and accessories
Input Connectors                            2 x XLR sockets (1+ / 1-) with junction box
Rigging and Hardware                            none
handle                            2 on the side, 4 in total
Box shape                            Rectangular CNC-made wooden wedge structure assembly
Housing Material                            18mm multi-layer birch plywood
Shell coating and color                            Durable black raindrop paint finish 
Grille Materials and Treatments                            Black perforated mesh Moisture-resistant and waterproof acoustic mesh backing
Move and protect                            4 rubber feet on the bottom
Product Dimensions – Unpackaged: 
Front height                            645 mm (25.39 in)
Rear height                            645 mm (25.39 in)
Front width                            1043 mm (41.06 in)
Rear width                            1043 mm (41.06 in)
depth                            770 mm (30.31 in)
Product Dimensions – Packaging: 
high                            1100 mm (43.31 in)
Front width                            700 mm (27.56 in)
Rear width                            700 mm (27.56 in)
depth                            825 mm (32.48 in)
weight: 
net weight                            80 kg (176 lbs)
gross weight                            85 kg (187 lbs)