【MICRO-250.4｜A compact, 4Ω-only Class D power amplifier】

You want to add an amplifier in your car’s limited space, but you’re concerned about mounting location and current consumption. If that sounds like you, we’d like you to consider the MICRO-250.4, which is scheduled to be released soon.

This compact power amplifier was developed with an emphasis on musicality, while keeping current draw low thanks to Class D operation. Since it is a 4Ω load-only model, you’ll need to confirm the speakers and overall system configuration you plan to pair it with; however, if your setup meets the requirements, it can deliver an even more solid driving force to your in-car sound.

The unit measures 127(W) × 42(H) × 94(D) mm. Even if you want to add an amplifier, this size makes it easier to install in vehicles where it’s difficult to secure a large space under the seat or around the luggage area. And it isn’t just about prioritizing compactness: the low-pass filter, which has a major impact on the music, uses premium coils. By suppressing DC resistance, it keeps frequency response changes caused by load impedance to 0.03% or less.

These are details that are hard to understand from catalog numbers alone, but they affect the cohesiveness of the sound after the amplifier is installed, as well as the impact and sense of authority in the low frequencies. It’s aimed at people who want more than just making the sound louder—who want to drive the speakers properly and achieve a tightly controlled, well-damped sound.

The final result depends not only on the amplifier’s standalone performance, but also on the vehicle’s system and how you combine it with the speakers, the power supply and wiring, the installation method, and the final tuning. If it were me, I would first check what you’re currently dissatisfied with in your sound and what kind of music you listen to, and then determine whether installing the MICRO-250.4 makes sense.

This is an amplifier we’d like to consider with you for a practical setup—while confirming compatibility with your vehicle and existing system, including the requirement that it’s 4Ω-only.

Main Specifications

【Basic Information】
Product name: MICRO-250.4
Type: Class D power amplifier
Release: Scheduled for release soon

【Compatible Loads】
Compatible load: 4Ω only

【Filter】
Low-pass filter: Uses premium coils
Frequency response change due to load impedance: 0.03% or less

【Dimensions】
Width: 127 mm
Height: 42 mm
Depth: 94 mm