Stanton A.1800 Power Amplifier Features:

2-channel, parallel, or bridged mono operating modes
Power rating: 400W/ch @ 8 ohm, 600W/ch @ 4 ohm, and 900W/ch @ 2 ohm; 1,200W @ 8 ohms and 1,800W @ 4 ohms bridged mono
Independent limiters for each channel
Independent input level controls for each channel
Precise signal and clip LED indicators
Low-frequency filters (40Hz)
Twin-tunnel and 2 temperature-sensitivity forced-air cooling system
Balanced XLR and balanced 1/4" TRS combination input connector for each channel and LINK ports
5-way output binding posts and Speakon connectors
High-current toroidal transformer
Independent DC and thermal overload protection on each channel
Rackmountable in any standard 19" rack
Signal to Noise Ratio (20Hz-20kHz): 102dB
Distortion (SMPTE-IM): 0.01%
Input sensitivity @ 8 ohms: 4dBu
Voltage Gain: 33dB
Output Circuitry: AB
Current Consumption: 120Vac / 240Vac
@ 1/8 power @ 4 ohms: 7.2A / 3.5A
@ 1/3 power @ 4 ohms: 12A / 6A
@ Rated power @ 4 ohms: 19.5A / 9.5A
Distortion: 20Hz-20kHz Half Power: 0.01%; 1kHz Rated Power: 0.1%
Frequency Response: 0/-0.5dB; 20Hz-20kHz, 0/-3dB; 5Hz-60kHz
Damping Factor (400 Hz): 280
Input Impedance: 15kOhm Unbalanced, 30kOhm Balanced
Input Clipping: 22dBu (10Vrms)
Cooling: Continuously variable speed, Front to rear
Connectors (each)
Input: Active balanced combo (XLR and 1/4" TRS common use)
Output: 5-way Binding post and Speakon
Control
Front: AC power switch, Channel 1 and 2 volume
Rear: HPF switch, Limiter switch, Mode selector switch
Indicators: Active (blue), Protection (red), Clip (red), Signal (green & yellow)
Protection: Short circuit, Thermal, Current limit, DC offset, Current inrush, RF protection, Turn on / Turn off muting
Power requirements: 100, 120/240Vac, 50/60Hz
Dimensions: 19"W x 3.5"H x 16.5"D (482 x 88 x 420mm)