Compact high ouput two-way externally powered studio monitor with 725G five-inch (127 mm) high-excursion low frequency transducer and 2409H high-frequency compression driver; Patent-pending Image Control Waveguide provides a seamless crossover transition and detailed imaging. 39Hz - 36 kHz frequency range; 107dB Maximum Peak SPL; Dividing Network Transition Frequency: 1.9 kHz. Dividing Network can be bypassed for bi-amplified operation. Birch Plywood enclosure includes rear and bottom mounting points; Not intended for stand-alone use. Complete system requires HARMAN Professional signal processor and external Crown Power Amplifier (not Included.)