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Bromley 750 is designed both to sound and look good in and outdoors, while Bromley 450 is more tailored to be used outdoors and around your home. This is something that’s been considered when it comes to the acoustics. The sound character control knob on Bromley 750 is perfect for adjusting the sound to fit both in and outdoors, while Bromley 450 don't have that feature. Each product features a 360 True Stereophonic acoustic concept with Marshall signature sound. If you want the specs, Bromley 450 has a max spl of 100dB @ 1m with 400W of peak power while Bromley 750 packs a bigger punch with a max spl of 127dB @ 1m with 500W of peak power .
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