Product Description
The Yorkville AudioPro AP4K is a dual-channel 1800W Class-H power amplifier, engineered for professional PA systems and high-demand audio applications. Delivering 1800 watts per channel into 2 or 4-ohm loads (3600W bridged), this amplifier combines proven Class-H design, advanced protection circuitry, and robust cooling for reliable, distortion-free performance under the most demanding conditions.
Equipped with balanced XLR and ¼-inch TRS inputs, Speakon™ and binding post outputs, and a toroidal transformer, the AP4K ensures versatile connectivity and seamless integration in live sound, touring, and club setups.
Features
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Delivers 1800W per channel into 2 or 4-ohm loads, 3600W bridged
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Proven Class-H design for high efficiency and reliability
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Advanced protection: DC, load, thermal, and breaker safeguards
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Transparent, user-defeatable peak limiter circuits
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Soft turn-on to prevent speaker damage and nuisance breaker trips
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Handles reactive and phase-shifted loads effortlessly
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Front panel metering and status LEDs for easy monitoring
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Speakon™ 4-pin and binding post outputs
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Balanced XLR and ¼-inch TRS inputs
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Internal fans with front-to-rear cooling
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All-steel chassis with baked black finish
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Made in Canada
Specifications
Amplifier
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Class: H
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Continuous Average Power:
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8 Ω: 600W x2 (2Ω mode) / 1000W x2 (4Ω mode)
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4 Ω: 1000W x2 (2Ω mode) / 1800W x2 (4Ω mode)
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2 Ω: 1800W x2 (2Ω mode)
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Bridged: 3600W @ 4Ω / 3600W @ 8Ω
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Burst Average Power:
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8 Ω: 1000W x2 (2Ω mode) / 1800W x2 (4Ω mode)
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4 Ω: 1800W x2 (2Ω mode) / 3500W x2 (4Ω mode)
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2 Ω: 2500W x2 (2Ω mode)
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Bridged: 5000W @ 4Ω / 7000W @ 8Ω
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Frequency Response: 20 Hz – 20 kHz (±1 dB)
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THD (20 Hz–20 kHz, 4Ω): <0.1%
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Damping Factor: 600 (30Hz–400Hz @ 8Ω)
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Input Sensitivity: 1.0V (2Ω mode) / 1.4V (4Ω mode)
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Max Voltage Gain: 36 dB
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High-Pass Filter: 50 Hz, 18 dB/oct
Connectivity
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Inputs: 2 x XLR, 4 x ¼" TRS
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Outputs: 2 x Speakon 4-pin, 2 x binding post
Physical
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Rack Spaces: 2
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Cooling: Internal fans, front-to-rear airflow
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Transformer: Toroidal
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Chassis: All-steel, black baked finish
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Dimensions (D x W x H / D from ears): 16.5 x 17.3 x 3.5 x 14.9 in (41.5 x 43.9 x 8.9 x 37.85 cm)
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Weight: 41 lbs / 18.5 kg
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Power Consumption: Typical 1130 W / Max 1800 W
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