... 3, Warranty: 3 years Naphon KTV Amplifier Karaoke Amplifier KA-250 Detailed Product Description1, 2x250W2, 25Hz~18KHz3, Warranty ... : 3 years Features: KA-250 series amplifier have reliable quality, best tone. Powerful ... Mic input,independenttone,professional effector. Specification: Model KA250S KA-250SKA-250QOutput power(4Ω) 2x250WMic input sensitivity 10mvInputs ...