You are bidding on a TOA DA-250F 4 Channel Multichannel Power Amplifier Factory B-Stock. This unit sounds like new and has some marks on it. Please look at photos. The DA-250F is a 4-Channel Digital Power Amplifier featuring lightweight, compact, high power output, and high efficiency. It delivers 250 W × 4 channels (4 Ω output) using a switching power supply. Each channel is equipped with an independent power section. It can be mounted in an EIA Standard equipment rack (1 unit size). Power Source 120 V AC, 50/60 Hz Amplification System Class D Power Consumption 200 W (based on UL/CSA standards) 1300 W (rated output 4 Ω × 4) 850 W (rated output 8 Ω × 4) Input 4 circuits, +4 dB* (1.23 V) (input level control in maximum position), 10 kΩ, electronically-balanced, removable terminal block (3 pins) CH 1 mode ON/OFF switch (ON: CH 1 to All ch, OFF: Each ch) Rated Output 4 channels: 250 W × 4 (4 Ω), 170 W × 4 (8 Ω) 2 channels (BRIDGE): 500 W × 2 (8 Ω) M4 screw terminal, distance between barriers: 8.8 mm Frequency Response 20 - 20,000 Hz (±1 dB) Total Harmonic Distortion 0.1% (1 kHz) 0.3% (20 - 20,000 Hz) Protection Circuit Protection against excessive current flow due to overload, short circuit, unusual DC voltage output, temperature rise at power amp. heat sink (110℃ or more), temperature rise inside the unit (80℃ or more) S/N Ratio 100 dB (A-weighted) Crosstalk 70 dB (A-weighted) LED Indicator Power (blue) × 1, Input (green) × 4, Output (yellow) × 4, Peak (red) × 4, Protect (red) × 4 Cooling Forced air cooling Operating Temperature -10℃ to +40℃ Operating Humidity 90% RH or less (no condensation) Finish Panel: Aluminum, black, aluminum Case: Plated steel sheet Dimensions 482 (W) × 44 (H) × 401.8 (D) mm Weight 6.6 kg