... :Professional amplifer 2:KTV use,also some other place KTV Amplifier/Merge KTV AmplifierLuxury innovative design of the panel, the largest ... make the machine flexble to control various occasions.4,Professional 20 Bit 64K digital echo circuit , two tones echo circuit design ... ,Pre-release output to facilitate the expansion of a power amplifier, the input / output ports can be more convenient to connect ...