【M-FOUR | A Class-D Power Amplifier That Delivers High Output in a Compact Body】

You want to increase the richness of the sound and the speaker’s drive capability, but the space available for installing an amplifier is limited. If that sounds like you, M-FOUR is the compact solution to consider.

Using Class-D operation, the amplifier section built with MOS-FETs is driven in a 2-parallel configuration. From a small body, it extracts the power needed to drive your speakers firmly. The power supply section also uses a 3-parallel MOS-FET configuration. It’s a power amplifier that supports the sound foundation not only when you turn the volume up, but also with everyday music.

The built-in crossover lets you set the high-pass at 15 Hz to 4 kHz and the low-pass at 40 Hz to 4 kHz. You can use it according to your system setup—for example, organizing the low-frequency range of the front speakers or adjusting the playback band for the subwoofer side. Since it supports 2-way multi systems, it’s also well suited for people who want to take their sound tuning one step further after replacing speakers.

It also supports switching between stereo mode and summing mode. That’s what makes the M-FOUR a good fit—you can integrate it while considering the input method depending on how you combine it with the vehicle’s factory audio or an existing system.

An amplifier isn’t a product that will sound the same once installed. How it sounds will change depending on the routing of the power and signal lines, the combination with your speakers, and the crossover settings. If it were me, I would first confirm your current system and what kind of sound you want to achieve, and then decide how to use the M-FOUR.

If you want a bit more power in the sound of your factory audio, want to make the most of speaker performance after a replacement, or want to build a multi system in limited space, please feel free to consult us. Let’s think together about a system that’s practical for your vehicle model and current setup.

Main Specifications / Specs

【Basic Information】

• Product name: M-FOUR
• Type: Class-D power amplifier
• Manufacturer: Amp

【Amplifier Configuration】

• Amplifier section: MOS-FET 2-parallel configuration
• Power supply section: MOS-FET 3-parallel configuration
• Operating mode: Class-D

【Crossover】

• High-pass: 15 Hz to 4 kHz
• Low-pass: 40 Hz to 4 kHz
• Operating modes: High-pass / Low-pass (band-pass)
• Supported system: 2-way multi system
• Band-pass usable channels: 3ch / 4ch / 5ch / 6ch

【Mode Switching】

• Stereo mode
• Summing mode