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Re: Marching Sound System Solution
The best is the SoundProjections SoundMachine SM_ Neo (Not sure what model number is current. Lasts well and sounds great. We've had ours now for 10 years and it's still going strong. (Did have to have a battery replacement)
The second is the SoundProjections VoiceMachine. Both are solid and would be a much better option than what you have.