The ZA-2120 is a high cost-performance power amplifier suited for broadcasting paging or background music in schools, offices, shops, factories, mosques, churches, and large rooms. Specifications : Power Req : 220 - 240 V AC, or 24 V DC Rated Output : 120 W Power Consumption : 124 W (AC operation EN60065) Frequency Response : 50 - 20,000 Hz (±3 dB) Input : MIC 1 - 3: -60 dB* (1.0 mV), 600 Ω, balanced, phone jack ; AUX 1,2: -20 dB* (100 mV), 10 kΩ, unbalanced, RCA pin jack Output Speaker out: Balanced (floating) ; High impedance: 83 Ω (100 V), 42 Ω (70 V) ; Low impedance: 4 Ω (22 V) Rec out: 0 dB* (1.0 V), 600 Ω, unbalanced, RCA pin jack Phantom Power : DC +21 V (MIC 1) S/N Ratio : over 60 dB Tone Control : Bass: ±10 dB at 100 Hz ; Treble: ±10 dB at 10 kHz Muting : MIC 1: Mutes other input signals by 0 - 30 dB attenuation Indicator Power LED, signal LED, peak LED Dimensions : 420 (W) × 101 (H) × 360 (D) mm Weight : 10.8 kg