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XB-3U series power amplifier enjoys a stable and reliable circuit design, beyond the beauty of traditional whole structure; Excellent fine cooling system provides overheating and overload protection; Output DC potential protection; ON OFF striking resistant current circuit design; Temperature control electrodeless high speed air cooling heat dissipation. Powerful sound, easy-controlled low frequency, very high damping, mellow and full intermediate frequency; Transparent and bright high pitch, sweet and smooth. Adopt the classic Toshiba large power amplifier tube perfectly combined with the amplifying circuit, military-grade large-capacity electrolytic capacitors for current reserve, strong dynamic creating a surge of power. Output DC voltage protection and self-locking (avoiding damage to the speak occasions which causing by repetitive relay turning on and off under critical state of protection). Overload distortionless compress and limit (when the circuit detects an output overload, it will automatically compress the power amplifier to keep signal output never distorted). Temperature protection, power on delay and temperature control electrodeless speed regulating air cooling heat dissipation.

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