Utility model patent

The utility model relates to the field of karaoke power amplifier equipment, in particular to a digital karaoke power amplifier equipment.

Nowadays, among several types of power amplifier topologies, Class AB redrate amplifiers have been widely used in various audio products, including mobile phones, MP3 players and PMP systems. Because Class AB power amplifiers can provide high-quality signal amplification performance, they are very suitable for earphones and some low-power speakers.

But more newer and more convenient products have higher requirements for multimedia.

In recent years, with the improvement of people's living standards, people have put forward high requirements on the performance, efficiency and cost of karaoke amplifier equipment, and now most of the domestic karaoke amplifier is still in the form of traditional simulation of the former level plus AB power amplifier, although the sound quality is very good, but the efficiency is very low. The type B amplifier will have serious distortion when the signal is very low. Because of the output efficiency of class AB power amplifier and the fan to take away the heat, the simulation of the former stage, so that the circuit line is complex, the use of components, the number of shortcomings, as well as the cost of the problem.

The utility model aims to provide a digital karaoke amplifier equipment with good sound quality effect, simple circuit structure and high efficiency.

Features & Advantages:

Aluminum alloy wire drawing panel, high-grade.

24 Bit/96 bit professional digital effects processing chip, and professional K under the V effect of the same singing K effect, at the same time can be connected to the computer tuning.

Digital amplifier as a post-stage amplifier, high efficiency, low environmental protection energy consumption, power amplifier less heat.

Digital amplifiers have a clear treble, a rounded midrange, and a powerful bass without trailing.

Intelligent dynamic monitoring and protection system, CPU real-time monitoring machine working state, when the machine overtemperature short-circuit phenomenon will be displayed in real time on the screen.

All adopt SMD patch technology, the interior is simple and beautiful, the machine automation production product consistency is good, the performance is more stable.

Professional anti-howling technology.

Overload protection, short circuit protection, startup delay protection, over temperature protection, DC protection, output power limit.

Temperature control fan, low temperature super quiet.

All digital adjustment, LCD real-time display of all content.

All applicable to professional K down V, private cinema, high-end clubs and other places.

D250

8 ohm average power 250W x 2

4 Ohm average power 450W x 2

Frequency mode 20Hz-20 KHZ. (+0.5.-0.5db)

Input sensitivity: 220mv music / 8.5mv microphone

Input impedance: 22KΩ

SNR > 105dB

Harmonic distortion: <0.05%

D350

8 ohm average power 350W×2

4 Ohm average power 600W x 2

Frequency mode 20Hz-20 KHZ. (+0.5.-0.5db)

Input sensitivity: 220mv music / 8.5mv microphone

Input impedance: 22KΩ

SNR > 105dB

Harmonic distortion: <0.05%