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Amazon.com: Studiomaster ISMA150 150W 100V Line 4 In and 6 Out Mixer Amplifier : Musical Instruments
Amazon.com: VoiceBooster Voice Amplifier 12watts Black MR1505 by TK Products, Portable, for Teachers, Coaches, Tour Guides, Presentations, Costumes, Etc. : Musical Instruments
Amazon.com: Dual Channel L150W Amplifier 6 pcs per Channel 200W MOSFET Field Effect Tube Finished Board : Electronics