This disco system is composed of 4X15" full range speakers Trojan-2618 and 2Xdouble 18" subwoofers Trojan-2679. All the speakers are assembled with some EU parts having UKM paper cone, VC and spider from an england speaker component manufacture. Application: Disco, Dancing Hall, Music entertainment reinforcement etc. Technical specifications: Trojan-2618: TYPE: 2-way full range trapezoid loudspeaker FREQUENCY RESPONSE: 40Hz-20kHz±3dB TRANSDUCERS: 1×15″/4″voice coil LF driver              1×1.5″exit HF compression driver  RATED POWER: 450W  RECOMMANDED AMPLIFIER: 450-900W into 4 ohms  SENSITIVITY: 99dB  MAXIMUM SPL: 127dB continuous,133dB peak  NOMINAL IMPEDANCE: 8 ohms nominal  DISPERSION(-6dB): 80°horizontal,50°vertical  FINISH: Textured black paint  PROTECTIVE GRILLE: Black perforated steel  CONNECTORS: 2×Neutrik speakon NL4  FITTINGS: 10×M8 threaded inserts  DIMENSIONS: (W)690mm×(H)470mm×(D)450mm  WEIGHT: 41kg Trojan-2679: TYPE: Compact,vented sub bass system  FREQUENCY RESPONSE: 35Hz-150Hz±3dB TRANSDUCERS: 2x18" Bass Driver RATED POWER: 1000W  RECOMMANDED AMPLIFIER: 1000-2000W into 4 ohms  SENSITIVITY: 100dB  MAXIMUM SPL: 130dB continuous,136dB peak  NOMINAL IMPEDANCE: 4 ohms nominal  DISPERSION(-6dB): N/A  FINISH: Textured black paint  PROTECTIVE GRILLE: Black perforated steel  CONNECTORS: 2×Neutrik speakon NL4  FITTINGS: Top hat fitting  DIMENSIONS: (W)560mm×(H)1060mm×(D)780mm  WEIGHT: 89KG