FYKD-500W amplifier speakerFeatures: FYKD-500W amplifier, power amplifier, adopting a output mode of constant voltage 240V or 120V and resistance 16Ω, and feed back to the loudspeakers by the line transformer. 1use Toshiba power transistors (2SC5200, 2SA1943) 2 equipped output short circuit protection 3 equipped with automatic power off function for the output line 4 power transformers adopting high-efficiency ring-type transformer with low power consumption 5 voltage with wide scope 6low distortion, wide temperature adaptability 7 widely used in urban and rural areas specification model FYKD-500W Fixed output power 500W Output voltage regulation ≤2dB Output model 240V or 120V and 16Ω resistance Input microphone-600Ω,2.0mV (-54dB) CD/DVD/line-10KΩ,200mV(-14dB) Frequency response microphone20Hz 20KHz (±3dB) line20Hz 20KHz (±2dB) Total harmonic distortion ≤ 2%(rated power) Signal to noise ratio microphone:60dB CD/DVD/line:70dB power AC220V±10% dimension standard19'3U chassis