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jp77Down4Sound JP77 WHITE Amplifier: 3000W RMS - 7 Channel Amplifier. Elevate your car audio experience with the Down4Sound JP77 WHITE. This 7-channel amplifier, finished in a sleekDown4Sound JP77 RED Amplifier: 3000W RMS - 7 Channel Amplifier. Transform your car audio system with the Down4Sound JP77 RED. This 7-channel amplifier is a powerhouse, delivering a massive 3000W RMS.