This set of Mackie SRM450 speakers are in great condition. The speakers feature a 2-way bi-amplified, optimized active system, built-in precisin 24dB/oct. Linkwitz-Riley electronic crossover, high-output precision titanium compression driver, 300mm long-throw low frequency transducer, high SPL Output/low distortion, electronic time correction, phase alignment, and equalization and tough, impact-resistant, lightweight polypropylene enclosure. The speakers have an internal 400 watt amp designed for extreme output

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