Various sound systems

Stereo

Required Equipment：Analog Mixer、Power Amplifier、Speaker

The most standard and simple sound system.
Setting up is easy, and even beginners can use the system at ease. Great for karaoke and events.

Stereo + mono subwoofer

Required equipment：Analog mixer、channel divider、 power amplifier、speaker (high frequency)、subwoofer (low frequency)

It is also called a 2.1ch system. The subwoofer sounds in monaural combining the right and left signals.
Because subwoofers have weak directivity, even a single unit can cover a sufficient range.
A power amplifier is required for both high frequencies and another one for low frequencies respectively.

Stereo 2 way

Required equipment：Analog mixer、channel divider、power amplifier、speaker (high frequency)、subwoofer (low frequency)

Add a low frequency dedicated subwoofer to the stereo. Sound separation is good because you can play high-frequencies and low-frequencies with good speakers, respectively, and you can get powerful sound.
Ideal for live houses and club events.
A power amplifier is required for high frequencies and another one for low frequencies.

* There are two types of crossovers that divide the high and low frequencies, the type built into the subwoofer, and the type using a channel divider.
Many of the built-in crossovers have fixed frequencies, so they can be used easily without special settings, and the channel divider can reversely distribute at any frequency and control the volume balance.

Stereo 3 way

Required equipment：Analog mixer、channel divider、power amplifier、tweeter (high range)、squawker (mid range)、subwoofer (low range)

It is divided into three parts, high band, mid band and low band, and it has a clearer sound than the 2 way system.
In addition to being used in relatively large speaker systems such as those used in halls, they are also sometimes used for home audio.
A power amplifier is required for high frequencies, another for mid frequencies and a third for low frequencies respectively.