Key features ..............................2
Signal output connectors .....................6
2CH Panel ……........................3
Operating instructions .......................7
4CH Panel …..........................4
Maintenance .................…….8
Safety instructions …………………………..5
Troubleshooting .....................8
Precautionary measures and cautions ………..6
Specifications ....................9
Signal input connectors ........................6
Proper product disposal .................10
The KDA series is a very cost-effective, compact, easy-to-operate unit. Self-oscillating design type Class D
power amplifier with outstanding voice intelligibility, an excellent S/N ratio, clearly defined highs, a full mid
range and a powerful bass. It is ideal for DJs, audio studios, hotels, conference and multifunction rooms,
multi-media classrooms, etc.
The KDA series digital power amplifier design is upgraded from standard digital power amplifier, inherited
the high reliability and wide applicability. The form of digital modulation circuit is equipped, which allows the
tone quality to have a large dynamic range, high efficiency and low distortion. Bridge mode is also possible,
which allows the amplifier to have strong applicability. The power supply adopted the advanced SMPS circuit
design and APFC design, to provide a 100~240V universal applicable power supply with extremely high
efficiency. The APFC power supply provides a circuit power factor up to 0.99.
Years of dedication on digital amplifier, enable successfully to develop a new circuit topology: the more
complete digital signals are obtained after music signal adopting the new modulation mode. This new
modulation mode ensures sampling of some extremely small signals and enriches sampling modes. In addition,
the fixed switch frequency is greatly reduced, which allows the power amplifier to produce less heat and
greatly enhance the efficiency. At the same time, the static power consumption is also reduced by a wide
range.
The circuit protection has been carefully designed. As far as the short circuit problem is concerned, we solve
an insurmountable difficult problem in this field of the industrial, high frequency short circuit judgment.
Through a large number of experiments and improvements, we design a unique circuit to make the KDA series
power amplifier fully reliable. In addition, we dedicated on the study of power protection, current overloading
protection, over-voltage protection, under-voltage protection, temperature control, DC protection, peak
clipping, amplitude limiting, VHF protection and Automatic temperature control fan system.
Some characteristics of the KDA series digital amp:
* When the amp’s power plug has connected to the AC power, the amp will lit an orange LED, to indicate the
amp is power-connected.
