Advice on which power amplifier is best for a 20m² karaoke room?

Choosing a power amplifier for a 20m² room depends directly on the purpose of use, number of speakers, system configuration and future expansion needs.

For basic family karaoke rooms using 1 pair of full speakers or 1 active subwoofer, a 2-channel amplifier is the optimal solution in terms of cost, simple to install and powerful enough to ensure clear, thick and stable sound quality.

However, if you want to upgrade your system over time – such as adding monitors, center speakers, bi-amp configurations, audio zones, or combining stereo music and karaoke – a 4-channel amplifier offers superior flexibility, supporting more complex combinations without replacing equipment.

Technically, the amplifier should have an RMS capacity of 250–500W/channel, suitable impedance (4Ω–8Ω), THD <0.1%, SNR >90dB and frequency range 20Hz–20kHz to ensure clean sound, no distortion and low noise.

In any case, the selection should be accompanied by a matching test between the speaker and amplifier, space conditions (ventilation, sound coverage area), and especially the actual usage needs: karaoke, listening to music, watching movies or mini performances.

If your budget is limited and your system is simple, choosing 2 channels is reasonable. But if you want a long-term investment, easy to expand and multi-purpose, a 4-channel amplifier will be a worthy choice.

This article will give you the most comprehensive and detailed view to choose the ideal power amplifier for your 20m² room.

Quick answer – Should a 20m² room use a 2-channel or 4-channel amplifier?

Choosing the right power amplifier for a 20m² space depends on the number of speakers, the configuration and the purpose of use. The question is: is a 2-channel or 4-channel amplifier the optimal solution for this small space?

Overall assessment based on room size, speaker configuration and usage needs

For a room of about 20m² – which is a common space for family karaoke rooms, small music rooms or mini meeting rooms – the criteria for choosing a power amplifier should focus on efficiency, simplicity in combination, and the ability to make good use of the accompanying speaker system.

In most cases, a 2-channel amplifier is a reasonable choice because it is enough to pull a pair of full-range speakers (full speakers) or combine with an active subwoofer, helping to optimize space and avoid unnecessary power waste.

However, if the user intends to expand the configuration in the future such as adding monitor speakers, center speakers, or separate speaker zones (zone A/B), the 4-channel amplifier will allow for more flexible audio signal distribution. This is especially useful when using a mixer with multiple outputs, or when dividing the sound by instrument group or frequency range.

Additionally, if you have a multi-purpose sound system that is used for both karaoke and stereo music, 4 channels will provide a more powerful and technically customizable expansion platform.

In short, if the need is standard 2-speaker family karaoke, no subwoofer or only active subwoofer, then 2-channel amplifier is suitable and economical. But if you are aiming for a more complex configuration, prefer customization or prepare for upgrade, then you should invest in 4 channels from the beginning to avoid replacement later.

Typical use cases for each type – from basic to advanced

Understanding each practical application case will help you visualize and make the right decision. Below are some typical situations that you can refer to:

Base case (most common standard): 20m² karaoke room with 2 full-range speakers (2-way or 3-way full speakers), no subwoofer or active subwoofer (with built-in amplifier). In this case, only a 2-channel amplifier is needed, with an RMS capacity of about 300-500W/channel, which is strong enough to ensure sound quality while saving space and electricity.

Intermediate case (slight upgrade): Karaoke system for a 20m² room but with an additional passive subwoofer and wanting to separate the subwoofer into a separate channel. At this time, a 1-channel amplifier is needed to divide the 4 channels into full-range speakers and the remaining 2 channels can be bridged to pull the subwoofer, or used independently for each frequency band if there is a dedicated crossover.

Advanced case: Integrated karaoke + movie sound system, want to divide the speakers into multiple zones such as front - rear stereo speakers, or play in bi-amp configuration (separate frequency division for woofer and tweeter). 4-channel amplifier will be the optimal choice in this case, especially if combined with digital reverb with crossover frequency division or DSP digital signal management system.

Special case: Mini performance sound system at a coffee shop or small studio (~20m²) using many different types of speakers. Need a 4-channel amplifier with the ability to customize each channel independently, high power, impedance suitable for many different types of output devices.

In all cases, it is necessary to pay attention to matching the power between the amplifier and the speaker, ensuring that the RMS power of the amplifier is at least 80% - 120% of the average power of the speaker to achieve optimal efficiency, no distortion, no overload.

Basic understanding of power amplifiers – Role and operation

In any professional audio system – whether it is a home karaoke system, a stage system or a conference room – the power amplifier plays a central role in amplifying the audio signal and controlling the speakers to produce accurate, clear and powerful sound. To choose the right type of amplifier for a 20m² room, you need to clearly understand the nature, operating principles and differences between 2-channel and 4-channel amplifiers.

What is an amplifier? Why does a sound system need it?

A power amplifier is a specialized audio device that amplifies weak audio signals from a mixer or digital echo, bringing this signal to a power level large enough to control the speaker to produce clear, powerful sound without distortion.

In many modern sound systems, especially home karaoke systems, integrating a separate power amplifier instead of using a built-in amplifier helps increase performance, optimize sound quality and easily combine with many types of high-power speakers or passive subwoofers.

Without an amplifier, the output audio signal will be weak and lack power, resulting in unclear sound, lack of depth and insufficient diffusion in the room space - even in a small area like 20m². Especially with low impedance speakers or speakers with high power requirements (eg 8Ω - 300W RMS), the use of an amplifier is mandatory to ensure proper power matching.

Operating principle and basic technical diagram

The power amplifier operates based on the principle of linear amplification, in which the input signal (line-level from the mixer or digital signal processing device such as DSP/Digital Echo) will be transmitted through the amplification stages including: input stage, voltage amplifier, driver stage and output stage. In the basic circuit diagram, these components are arranged in the form of class AB, class D or class H amplifier circuits.

Class AB is often appreciated for its high sound quality, low distortion but lower power consumption.

Class D uses switching digital amplifier technology, has an efficiency of up to 90% and is often used for systems that require high power, energy saving, low heat dissipation - very suitable for small spaces.

In addition, the amplifier also integrates a switching power supply, active cooling fan, overload protection circuit, anti-distortion circuit and noise filtering - ensuring stable operation for a long time.

Detailed comparison of 2-channel amplifier and 4-channel amplifier: Advantages, disadvantages and practical applications.

Choosing between 2 channel power amplifier , and 4 channels for a 20m² room is an important decision, directly affecting your sound experience. To make the optimal choice, we need to compare in detail Advantages, defect , and practical application of each type, especially in the context of the audio market in 2025. Understanding these differences will help you determine which type of amplifier best suits your needs and budget.

2 channel power amplifier Often favored for its simplicity, ease of use and affordable price, suitable for basic stereo systems or home karaoke.

The biggest advantage of this type of amplifier is the ability to concentrate power on two channels, thereby providing high performance for reproducing quality stereo sound, especially when combined with front speaker pairs.

However, defect of 2 channel amplifier is a limitation in the ability to expand the sound system. If you want to add surround speakers or a subwoofer, you will need another amplifier, which is expensive and complicated to connect.

Opposite, 4 channel power amplifier offers outstanding sound system flexibility and expandability.

Advantages Its highlight is the ability to connect multiple speakers at the same time, allowing you to easily build a surround sound system or multi-zone sound system. This is especially useful for watching movies at home, providing a vivid and realistic sound experience.

Though, 4 channel amplifier are often more expensive than 2-channel types, and setup and adjustment can be more complicated for beginners. In addition, in some cases, the power per channel can be lower than that of a 2-channel amplifier with the same total power, affecting the performance of each speaker if not properly matched.

To make the most suitable decision for a 20m² room, you need to carefully consider factors such as:

• Main uses: Listen to music, sing karaoke, watch movies, or a combination?
• Number of speakers expected to be used: Stereo system, 2.1 system, or 5.1/7.1 surround sound system?
• Investment budget: How much are you willing to spend on a power amplifier?
• Level of audio understanding: Do you have experience setting up and adjusting sound systems?

The detailed comparison table below will provide a more comprehensive overview of 2 channel power amplifier , and 4 channels, making it easy for you to make the right choice:

Features/Characteristics	2 Channel Power Amplifier	4 Channel Power Amplifier
Advantages	Simple, easy to use, affordable, high performance stereo sound	Flexible, scalable sound system, surround/multi-zone support
Disadvantages	Limited expandability, need to add amplifier if want to add speakers	Higher cost, more complex setup, power per channel may be lower
Practical application	Listen to stereo music, family karaoke with 2 speakers	Watch movies at home with surround sound, multi-zone audio systems
The initial investment	Lower	Higher
Complexity of setup	Easily	More complex

Choosing between 2 channel power amplifier , and 4 channels depends on your needs and budget. If you just need a simple stereo system for listening to music, 2 channel amplifier is a suitable choice. However, if you want to build a surround sound or multi-zone system for watching movies or multimedia entertainment, 4 channel amplifier would be the better choice.

What kind of power amplifier is suitable for a 20m² room? Analysis according to specific usage purposes

Choice 2 channel power amplifier or 4 channels for a 20m² room depends largely on your specific audio needs. A 20m² room can meet the needs of listening to music, singing karaoke or watching movies at home, however, each of these purposes requires different requirements in terms of wattage, signal processing capabilities and flexibility of amplifier.

To make the right choice, it is necessary to consider the main purpose of the sound system in a 20m² room. If it is mainly used for listen to music at home, sound quality and faithful sound reproduction are of utmost importance.

With demand family karaoke, amplifier need to ensure enough power to reproduce clear and strong vocals, and have high durability to withstand continuous operating pressure. As for the purpose watch movies at home, amplifier need to be able to reproduce immersive surround sound, providing a true cinematic experience.

• Listen to Music at Home: If refined sound quality is a priority, a 2 channel amplifier with moderate power (about 50-100W/channel) can be the optimal choice. At this time, you should focus on parameters such as low total harmonic distortion (THD) and high signal-to-noise ratio (SNR) to ensure clean and clear sound.
• Family Karaoke: With karaoke, power is key. One 4 channel amplifier can be a good choice, allowing you to connect to 2 pairs of speakers (main speakers and subwoofer) or use it to pull 4 separate speakers, creating a stronger and more vivid sound effect. The required power level is usually from 150W/channel or more to ensure the sound is not distorted when singing loudly.
• Watch Movies At Home: For an immersive movie viewing experience, you may consider 4 channel amplifier to build a surround sound system. With a 5.1 or 7.1 system, the 4-channel amplifier can amplify the signal for the surround speakers and center speakers, reproducing multi-dimensional sound effects, helping you immerse yourself in the world of movies.

Instructions for choosing the right power amplifier for a 20m² room: Technical parameters to note

To ensure optimal performance of the sound system in a 20m² room, choosing the right power amplifier is extremely important, especially in the context of the continuously growing audio equipment market in 2025. Understanding the key technical parameters will help you make the right decision, balancing performance, sound quality and investment costs.

RMS Power – The Decisive Factor for Stable Sound Power

When choosing to buy a power amplifier, RMS power is one of the top factors to consider, because it directly determines the system's ability to reproduce strong and stable sound. RMS (Root Mean Square) power represents the power level that the amplifier can provide continuously for a long time without causing distortion or damage.

To choose the right RMS power for a 20m² room, you need to consider the power of the speaker you are using or planning to buy. The general rule is that the RMS power of the amplifier should be equal to or 1.2 to 2 times greater than the power of the speaker to ensure optimal speaker performance and avoid overloading the amplifier.

For example, if you use a pair of speakers with a capacity of 100W/speaker, a power amplifier with an RMS capacity of 120W to 200W/channel will be the right choice.

Impedance – Ensure compatibility between amplifier and speakers

Impedance is another important specification to consider when choosing a power amplifier, as the compatibility between the impedance of the amplifier and the speaker is a key factor in ensuring stable system operation and avoiding damage. Impedance is measured in Ohms (Ω), and typically, speakers have common impedances of 4Ω, 8Ω or 16Ω.

The power amplifier must be able to operate stably at the impedance level corresponding to the speaker. If the speaker impedance is too low compared to the amplifier's ability, the amplifier may be overloaded and damaged. Conversely, if the speaker impedance is too high, the amplifier will not be able to provide enough power, resulting in weak and lacking sound. Therefore, carefully check the impedance of both the amplifier and the speaker before connecting to ensure compatibility.

Frequency Response – Full sound reproduction from low to high

In addition to RMS power and impedance, frequency response is also an important factor in evaluating the ability of a power amplifier to reproduce faithful sound. Frequency response represents the range of frequencies that the amplifier can effectively amplify, usually measured in Hz (Hertz).

A good amplifier should have a wide frequency response, covering all the audible frequencies that humans can hear (from 20Hz to 20kHz). This ensures that all sounds, from deep bass to clear highs, are reproduced fully and accurately. Prioritize choosing an amplifier with as wide a frequency response as possible to experience the most vivid and realistic sound.

Total Harmonic Distortion (THD) – Keeps sound clean and distortion-free

To ensure that the sound coming from your system is always clean and clear, pay attention to the total harmonic distortion (THD) of your power amplifier. THD is a measure of the level of distortion of the audio signal caused by the amplifier, expressed as a percentage (%).

A good amplifier needs to have as low a THD as possible, ideally below 0.1%. High THD will make the sound distorted, shrill and unpleasant for the listener, especially when playing sound at high volume. Therefore, when choosing to buy an amplifier, carefully study this parameter and prioritize models with low THD to ensure the best sound quality for small rooms such as 20m².

Signal-to-Noise Ratio (SNR) – Eliminates background noise, keeping audio clear

Finally, the signal-to-noise ratio (SNR) is also an important parameter to consider when evaluating the ability of a power amplifier to reject unwanted noise. This ratio represents the difference between the useful audio signal level and the background noise level, measured in dB (decibels).

A quality amplifier needs to have as high an SNR as possible, usually above 90dB. High SNR means the system will have less background noise or electrical noise, helping you enjoy clear, clean sound in a listening space of almost 20m². Especially with light music, bolero or acoustic, just a little noise is enough to significantly reduce the sound experience.

Top 5 best 2-channel and 4-channel amplifiers for 20m² rooms today.

Choice power amplifier suitable for a 20m² room is the key factor to get a vivid and quality sound experience. The audio market in 2025 witnessed a diversity of models and technologies, making it difficult for users to make a final decision.

Here is the list Top 5 best 2-channel and 4-channel power amplifiers are rated based on power, signal processing, versatility, cost, and other important factors, making it easy to find the ideal product for your entertainment space.

To make an objective assessment, we carefully considered the factors that directly affect the performance of power amplifier in 20m² space. RMS power is the most important factor, ensuring the sound is strong and stable enough, especially when used with different types of speakers.

CAVS DG2600 Amplifier – Balance between power and durability for small spaces

CAVS DG2600 Amplifier is a high-power 2-channel amplifier line, belonging to a prestigious brand from the US. Each channel has a real capacity of up to 600W @ 8Ω and 900W @ 4Ω, suitable for rooms with high-power speaker systems or rooms that require strong volume such as family karaoke.

With Class H circuit, the DG2600's performance is both powerful and energy-saving. Low THD distortion < 0.05% and SNR over 100dB, providing clean sound, thick vocals and no cracking in the high range. Smart dual cooling fans and built-in anti-interference filter make this device extremely stable, suitable for closed spaces.

LEQI PA500 – Compact, energy saving, suitable for mini karaoke systems

LEQI PA500 Amplifier is a 4-channel amplifier in the popular line but is highly appreciated for its flexibility, especially in home audio systems. The capacity of each channel is about 250W RMS @ 8Ω, completely enough to combine 2 pairs of full-range speakers or 1 pair of full + 1 pair of monitors.

Using Class D circuit, LEQI PA500 not only operates quietly but also has the ability to save up to 30-40% of electricity compared to class AB lines. Compact size, easy to install in audio equipment cabinets or mini stands. This is the optimal choice for those who need a compact system but still have sound spread evenly throughout the room.

EUDAC DE500 – 2-channel amplifier, good price, clean sound, stable operation

EUDAC DE500 Amplifier is an ideal choice for beginners in audio or mini karaoke systems in the family. Each channel has a capacity of about 300W RMS @ 8Ω, working stably with most popular speaker lines such as JBL, Paramax, Nanomax...

The strengths are clear, faithful sound, clean microphone sound and good anti-feedback. THD harmonic distortion is only ~0.1%, suitable for karaoke, listening to music and watching movies. In addition, DE500 is also easy to install and has high durability thanks to its sturdy metal frame, speaker protection circuit and anti-electric shock.

E3 TX4500 – Professional, powerful and stable 4-channel amplifier

E3 TX4500 amplifier is a high-power amplifier line specifically designed for professional sound systems or karaoke rooms that require multiple speakers. Each channel reaches 500W RMS @ 8Ω, more than enough for all needs from 2 pairs of speakers to 2 full speakers + 2 passive sub configurations.

The TX4500 uses a new generation Class D circuit, with superior power saving capabilities, extremely low distortion, and can operate continuously for many hours. The thermal protection system, short circuit protection, and intelligent fan help the device operate durably even when playing high volume in a closed space.

K Treasure PE2600 – High performance, modern design, easy to match

K Treasure PE2600 Amplifier is a 2-channel amplifier designed for home users who love high-quality sound. Each channel can provide 400W RMS @ 8Ω, enough to match with mid-range to high-end karaoke speakers.

PE2600 Beautiful design, LCD screen displays status, easy to monitor and adjust. Digital noise filter circuit helps music sound clear, bass is tight, less noise when operating near TV or karaoke player. This is a suitable device for moderate space but requires clear, detailed sound quality.

Choice power amplifier The right fit depends on your specific needs, but the list above provides the best suggestions so you can make an informed decision. Carefully consider factors such as power, signal processing, flexibility, and cost to find the power amplifier Ideal for your 20m² room, and enjoy the ultimate sound experience.

How to connect and use 2-channel and 4-channel amplifiers properly for a 20m² room

To get the most out of your power amplifier 2 or 4 channels in a 20m² room, proper connection and use is key. The following detailed guide will provide you with the correct steps, helping you to maximize the potential of your sound system and bring the best music experience.

Connect the amplifier to speakers and other devices

Connection process power amplifier With speakers and other audio equipment, follow these steps to ensure stable signal transmission and avoid damaging the equipment:

1. Turn off all devices: This is the first important step to ensure safety during connection, preventing possible electrical accidents.
2. Speaker connection: Use dedicated speaker wire to connect amplifier with the speaker. Make sure to connect the correct negative (+) and positive (-) terminals on both amplifier and speakers. Incorrect polarity can cause distortion or even damage the speakers. For amplifier 2 channels, each channel will connect to a speaker. With amplifier 4 channels, you can connect to 4 speakers or use configuration bridge to increase power for 2 speakers.
3. Signal source connection: Connection amplifier with audio signal source (eg mixer, amplifier, soundcard, CD player, phone, TV...) by signal wire RCA or XLR. XLR often preferred because of its better noise immunity, especially in professional audio systems.
4. Check connection: Once connected, double check all connections to ensure they are securely plugged in and that no wires are loose.
5. Power on the device: Power on amplifier and other audio devices in order: signal source first, amplifier after. This helps avoid electrical shock that could damage the speaker.

Adjust volume and basic parameters 

After successful connection, adjusting the volume and basic sound parameters is an important step to achieve the best sound quality for a 20m² room.

1. Adjust input volume: Start with the lowest volume on both amplifier and signal source, then gradually increase to a level that is comfortable for your ears. Avoid increasing the volume too suddenly, which can damage the speaker.
2. Gain adjustment: Gain function on amplifier allows you to adjust the sensitivity of the input signal. Adjusting the Gain appropriately helps optimize the signal-to-noise ratio (SNR) and avoid distortion.
3. Adjust EQ (Equalizer): If amplifier With built-in EQ, you can adjust the sound frequencies to suit your listening preferences and the acoustics of your room. However, EQ should be adjusted carefully, avoiding changing the natural timbre of the music too much.
4. Using different modes: Some amplifier Stereo, Parallel or Bridge modes are available. Consult your user manual to select the mode that best suits your speaker configuration and usage needs.

Maintain and clean the amplifier to prolong its life 

Maintenance and cleaning power amplifier Regular maintenance is key to ensuring stable, efficient operation and long life of equipment.

• Cleaning recurrent: Use a soft, dry cloth to wipe away dust and dirt on the surface. amplifier. Avoid using harsh detergents or solvents, which may damage the coating.
• Check connections: Regularly check speaker wire and signal wire connections to ensure they are securely plugged in and free of oxidation.
• Ensure ventilation: Put amplifier in a cool place, avoid direct sunlight and high temperature. Make sure there are no obstacles blocking the ventilation holes, helping amplifier good heat dissipation
• Check the radiator fan: If amplifier If the device has a cooling fan, check to see if the fan is working properly. If the fan is stuck or makes a loud noise, take the device to a service center for repair.
• Using voltage stabilizer: Use voltage stabilizer for protection amplifier from voltage fluctuations, especially in areas with unstable power supply.

By following the detailed instructions for connection, use and maintenance power amplifier 2-channel and 4-channel, you will be able to maximize the performance of the device and enjoy great sound experiences in a 20m² room space.

Important notes when using a power amplifier in a 20m² room: Safety and efficiency

To ensure great sound experience and long life for power amplifier When using in a 20m² room, it is essential to follow some important safety and efficiency notes. Because mastering these principles will not only help you maximize the potential of the sound system but also protect the equipment from unnecessary damage.

Avoid overloading the amplifier.

Overloading a power amplifier is one of the leading causes of reduced life and even damage to the device. Overloading occurs when wattage The demand from the speaker exceeds the power supply of the amplifier. This not only causes the sound to be distorted and difficult to hear, but also puts great pressure on the components inside the amplifier.

To avoid this situation, it is necessary to choose a power amplifier with RMS power match or slightly larger than total wattage of the speakers. According to sound experts, you should choose a power amplifier with wattage about 30% larger than wattage Speaker to ensure the amplifier operates stably and is not overloaded when playing music at high volume.

Ensure good ventilation for the amplifier to avoid overheating.

Overheating is a dangerous enemy of all electronic devices, and power amplifiers are no exception. During operation, the amplifier will generate significant heat, especially when operating at wattage high. Without proper heat dissipation, the internal temperature of the amplifier can rise to dangerous levels, affecting the performance and durability of electronic components.

To ensure the amplifier always operates in ideal temperature conditions, the device should be placed in a well-ventilated area, away from direct sunlight and other heat sources.

Note, do not place the amplifier in a closed space or stack objects on top, hindering the heat dissipation process. Periodically cleaning the amplifier to remove dust on the heat dissipation slots is also an important measure to maintain effective heat dissipation.

Use high quality connecting cables

Quality of connecting wire It may seem unimportant, but it has a significant impact on sound quality and system stability. Use connecting wire Poor quality can lead to signal degradation, interference, and even damage to audio equipment.

Invest in connecting wire High quality, with good anti-interference layer, pure copper core and sturdy plug is a worthy investment to ensure the audio signal is transmitted faithfully and without degradation.

In addition, it is necessary to periodically check the connecting wire to promptly detect and replace damaged, broken, or loose wires. The use of speaker cable has a cross section suitable for wattage of the amplifier and speakers is also an important factor to note.

Conclusion: Which power amplifier is best suited for your sound in a 20m² room?

Choice 2 channel vs 4 channel power amplifier The best amplifier for a 20m² room depends entirely on your specific audio needs in 2025. There is no single answer that fits everyone, but it is necessary to carefully consider factors such as intended use, number of speakers, and budget. This article has provided a comprehensive look at the pros and cons of each type of amplifier, helping you make the most informed decision.

If your main purpose is to listen to music at home with Hi-Fi sound quality, a 2 channel amplifier High quality may be the best choice. In this case, focus on parameters such as low total harmonic distortion (THD), high signal-to-noise ratio (SNR), and wide frequency response to ensure the most realistic and detailed sound. Some Class D amplifier The new generation is also a worthy choice thanks to its power saving and high performance.

Conversely, if you want to sing family karaoke or watch movies at home with a surround sound system, a 4 channel amplifier will bring better flexibility and expandability. You can use 4 channels to connect to front speakers, rear speakers, or center speakers, creating a vivid and realistic sound effect. In this case, prioritize power amplifiers with enough capacity to meet the needs of all speakers, and at the same time have good signal processing capabilities to avoid distortion when singing karaoke.

Finally, always remember that hands-on experience and consultation with audio experts are extremely important before making a final decision. Go to reputable stores, listen to different types of amplifiers, and compare them to find the product that best suits your ears and your needs.

Frequently asked questions about power amplifiers

Does the amplifier help prevent microphone feedback?

Not directly. However, when the amplifier is powerful enough and properly matched, the audio signal will be cleaner, helping the system process the microphone more effectively and reduce the risk of howling. To prevent howling well, you still need a digital echo or mixer with anti-feedback function (feedback eliminator) and reasonable EQ adjustment.

Can a power amplifier replace an amplifier?

Just in case you are using passive speakers + mix or digital echo. The amplifier does not have a pre-amplifier circuit, so if you only have a source (TV, phone...) without a mixer or echo, you cannot use the amplifier directly. Meanwhile, karaoke amplifier Usually integrates both signal processing and amplification so is suitable for basic users.

Should I combine the power amplifier with the amplifier?

Do not use the power amplifier and amplifier in parallel with the same output signal (unless you understand the frequency and power division). If the system already has a digital echo or mixer, then using a separate power amplifier is the optimal choice because it gives clean, clear sound and easy to control the power of each channel. Amplifiers should be used for small systems that do not need to be expanded.

Does using a power amplifier help reduce howling?

Not directly. However, a good amplifier with high SNR, low THD and good matching with the speaker will help reduce distortion and input overload - which are indirect causes of howling. The most important thing is to properly coordinate with a digital echo with feedback suppressor and adjust the gain appropriately to limit howling.

The power amplifier is making loud fan noise, is it a problem?

Not necessarily a bug. Some amplifier has an active cooling fan, when operating at high capacity or in a hot environment, the fan will spin quickly and make noise. However, if the fan makes unusual noises, vibrates or makes sounds like blades rubbing, you should check and clean the dust or bring it for warranty.

What kind of amplifier does the gym need to listen to loud music?

Gym sound Need solid bass, strong impact to create energy for the practitioner. Choose a 2-channel amplifier with high power (400-600W/channel) for a pair of 1-inch or larger full bass speakers, combined with a powered subwoofer to increase bass force. Priority should be given to class D lines with good heat dissipation, anti-overload when operating continuously all day.