How to choose a power amplifier in performance audio equipment?

Performance audio equipment is a key part of ensuring the performance effect, covering multiple aspects from sound source to power amplification. The following are the main components of performance audio equipment and its functions: Sound source equipment Music playback equipment: such as CD players, MD players, DVD players, etc., used to play background music and sound effects.

Audio pickup equipment: Including wired microphones, wireless microphones, walkie-talkies, etc., used to capture the voices of actors.

Control equipment Mixing console: Used to amplify, mix, distribute, modify sound quality and process sound effects of multiple input signals. Mixing consoles can be divided into analog type and digital type according to signal processing methods.

power amplifier

Power amplifier: converts the audio voltage signal into a rated power signal, which is used to drive the speaker to make sound. The selection of power amplifier requires consideration of output impedance and power matching.

Main slightly of speaker system: undertakes the main playback task, and its performance directly affects the playback quality of the entire audio system.

Auxiliary slightly: Used to supplement the sound effects of the main slightly and enhance the atmosphere of the scene.

Follow-back slightly: Used for actors or band members to monitor singing or performance to ensure synchronization.

Line array slightly: Suitable for large venues, it can achieve uniform coverage and long-distance transmission of sound.

audio processor

Equalizer: Used to adjust electrical signals at different frequencies to compensate for defects in speakers and sound field.

Effector: Add reverb, delay and other effects to enrich music performance.

Divider: Divide the full-band audio signal into different frequency bands and send them to the corresponding high, medium and woofers for playback.

other devices

Reverberator: Used to process human voices to make it more beautiful than electronic sound.

Voltage limiter: Used to control the dynamic range of audio signals to prevent overload.

Monitoring slightly: Used for program monitoring in control rooms and recording studios to ensure true sound quality.

How to choose a power amplifier in performance audio equipment? When selecting a power amplifier in performance audio equipment, the following key factors need to be considered: 1. Power matching rated power: The rated output power of the amplifier should be slightly higher than the rated power of the speaker. It is generally recommended that the power of the amplifier be 20% to 50% greater than the speaker to ensure sufficient power reserve without distortion. Music power: This is the power used by the power amplifier when playing music in analog music. It is usually 3-5 times the rated power, providing reference value.

2. The output impedance of the impedance matching power amplifier should match the input impedance of the speaker, usually 4Ω, 6Ω, or 8Ω to ensure sound quality and equipment safety.

3. Power amplifier type Tube amplifier (gallbladder machine): The sound is warm and soft, suitable for playing vocal, string and other music types. Transistor power amplifier (stone machine): Clean sound and strong sense of dynamic, suitable for playing large dynamic music such as symphony and rock music.

4. Signal-to-noise ratio and distortion ratio Select an amplifier with high signal-to-noise ratio and low distortion ratio to ensure purity and fidelity of sound quality.

5. The connection interface ensures that the input and output interfaces of the power amplifier are compatible with sound source equipment and speakers. Common interfaces include RCA, XLR, optical fiber, etc.

6. Thermal performance The power amplifier should have a good cooling system to prevent overheating from affecting performance and life.

7. Additional functions The high-end power amplifier may have equalizer adjustment, sound processing, multi-channel output and other functions, and can be selected according to needs.