Musysic MUP7K 7000W Professional Power Amp Alto com/en/repair_and_maintenance/serial_numbers/buescher_bundy dates it to 1921

com/en/repair_and_maintenance/serial_numbers/buescher_bundy dates it to 1921 but forums suggest that it's probably not 1921 but rather 1950s

gash on side of case

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Musysic MUP7K 7000W Professional Power Amp Alto com/en/repair_and_maintenance/serial_numbers/buescher_bundy dates it to 1921Notes Stereo Output Power: "2x4000W PEAK, 2x2000W Program, 2x1000W RMS @2" "2x2000W PEAK, 2x1000W Program, 2x500W RMS @4" "2x1000W PEAK, 2x500W Program, 2x250W RMS @8" Frequency Response: 20Hz 20KHz,+0, 1dB at watts THD+N(20Hz 20KHz) : 0. 2320Hz 20KHz Siew Rate 30V us Damping Factor 150 Output Circuitry: Class AB Signai to Noise Ratio 96dB Cross Talk 80dB lnput Sensitivity(8) 1V Connectors: Input: XLR input, 1 4" input: XLR Output: Speakon connector