In addition to the speakers and singing devices, the quality of the amplifier itself is also very important. [1]
The functions of KTV should be combined with your room size and decoration materials. Different rooms in different areas use different power amplifiers. Pay attention to the matching of power amplifiers and speakers.
The combined karaoke power amplifier designed in the early stage is generally relatively small in power. The matching speakers are all low-power speakers with high sensitivity. The most common problem is the feedback scream. The reason is that the power reserve is insufficient when working at large volume, resulting in serious signal distortion, coupled with the distortion feedback of high-sensitivity speakers, distortion is recycled. Enlargement leads to feedback scream. In principle, the main incentive of feedback scream is distortion. Reducing distortion can reduce the probability of feedback scream. But we can not say that we will never respond to feedback scream. We can only say that within the available gain range, when the gain is large enough, it will also lead to feedback scream. That is to say, karaoke power amplifier should choose high power as far as possible. However, the greater the power of the amplifier, the harder the tone sense. Through practical experience, each channel within 8_450W can be selected.
The room less than 18 square meters is basically a well-designed traditional ECHO effect karaoke amplifier. However, the traditional ECHO will cause the uncertainty of sound effects. The debugging requirements of each guest may make the manager unable to determine the effect in a unified position forever, and also make the DJ tired. The second reason for using a power amplifier with a DSP processor is that the traditional ECHO effect processing chip has a narrow frequency response range (less than 8KHz) and low sampling frequency, which makes it muddy and weak in the environment requiring high-power output, and can not drive far and has insufficient penetration. The sampling frequency up to 48K and the wide frequency range from 20Hz to 23KHz of DSP bring clearer sound quality and better medium and high frequency penetration force. That is why we can't sing, once we use the DSP power amplifier, our voice suddenly beautified, more magnetic, more charming, sound sounds more comfortable.
The third reason for using the power amplifier with a DSP processor is that the DSP effect processor can store multiple effect data, bring more real available Reverb - "reverberation" effect, give consumers more experience of singing K, truly realize consumers'self-service K songs, and greatly reduce DJ's service demand. In addition, the effect of VOD system is automatic. Starting function, the sound effect of the compartment can also reach a consistent level. To be fair, if we simply evaluate the timbre in the compartment below 18 square meters, the effect of a well-designed traditional ECHO is not inferior to that of the DSP, but appears to be thick and supple. The DSP is a bit too digital and not flexible. If we adjust the LPF of the DSP to 8Khz, the contrast between the two is more obvious, the main difference is in the low-frequency thickness part.
The choice of merged karaoke power amplifier and split combination of front and back levels mainly depends on the actual needs of the application room type. It is suggested to choose the merged karaoke power amplifier with DSP of about 200W for the room type of less than 18 square meters. For the room type of more than 18 square meters to about 25 square meters, three channels 200W DSP karaoke power amplifier can be selected to increase the middle speaker box for the middle tweeter voice compensation. Sound; The compartments over 25 square meters should consider the use of pre-and post-stage split collocation. According to the actual shape of the room, the factors such as sound pressure level, sound field uniformity and reverberation sound field establishment should be taken into account. The rear power amplifier of the main speaker should match the characteristics of the speaker to select the appropriate power, and the auxiliary low power speaker can be used. Multi-channel low-power post-stage power amplifier to reduce costs.
