The AP4K is Yorkville Sound’s flagship amplifier. This no-compromise, 2U powerhouse is our premier solution for virtually any touring or installed sound system. A rear panel switch selects 2Ω or 4Ω operation, and bridging the amp delivers up to 3600 watts of pure, clean power into 4Ω or 8Ω loads. The AP4K features a meticulously optimized signal path, with a toroidal transformer to reduce hum and interference. The 3-tier Class H design approaches the efficiency of Class D amplifiers while maintaining the superior transient response and low distortion of the best analog designs. With transparent limiting, advanced protection, all-steel construction, and exceptional sound quality, the AP4K is designed to excel in the most demanding conditions and power exceptional performances. Features 2-Channel Class H Design 1800 W per Channel @ 2Ω or 4Ω 3600 W Bridged @ 4Ω or 8Ω Balanced XLR and 1/4" Inputs Binding Post and speakON® Outputs Short Circuit, DC, and Thermal Protection Soft Turn-On Circuit to Protect Speakers All-Steel Construction Made in Canada Specifications Amplifier class Class H Continuous Average Power AT 8 Ohms (Watts) 1000 W x2 (4Ω), 600 W x2 (2Ω) Continuous Average Power AT 4 Ohms (Watts) 1800 W x2 (4Ω),1000 W x2 (2Ω) Continuous Average Power AT 2 Ohm (Watts) 1800 W x2 (2Ω) Continuous Average Power Bridged (Watts) 3600 W (8Ω, 4Ω) Burst Average Power AT 8 Ohms (Watts) 1800 W x2 (4Ω), 1000W x2 (2Ω) Burst Average Power AT 4 Ohms (Watts) 3500 W x2 (4Ω), 1800 W x2 (2Ω) Burst Average Power AT 2 Ohms (Watts) 2500 W x2 (2Ω) Burst Average Power Bridged (Watts) 7000 W (8Ω), 5000 W (4Ω) Frequency Response (Hz CM +/- 1dB) 20 Hz - 20 kHz Hum and Noise (un / Aweighted -dB) -100 dB Unweighted, -115 dB A-Weighted THD -1kHz- 4 OHMS
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