【D2 100.4 DSP｜A compact 4ch DSP amplifier for fine-tuning your sound】

You’d like to make the sound of your factory audio a bit more to your liking. You’re considering speaker replacements or adding a subwoofer, but there isn’t space in the cabin to mount a large amplifier.

That’s where the D2 100.4 DSP comes in. A compact 150mm-class body houses a 4ch digital amplifier and a DSP. It’s easy to install even in limited space, and lets you fine-tune the sound throughout your car.

Adjust the overall sound to match the cabin

With the DSP, you can adjust the equalizer, crossover, time delay, phase, and more.

Even with the same speakers and amplifier, in-car audio will sound different depending on the vehicle’s cabin shape, the speaker positions, and how it’s paired with the factory system. With the D2 100.4 DSP, you can move beyond simply increasing volume—you can shape the sound to suit your cabin, including the vocal positioning and how each speaker integrates.

Because it supports high-level inputs, it’s also easy to incorporate into system upgrades based on factory audio. It supports low-level inputs as well, so you can plan the connection method according to your system configuration.

Built for future system expansion

Audio corrected by the DSP can be output via the CH5/6 line outputs.

Start with the front speakers, and later combine a subwoofer or additional amplifiers—this unit is designed to be well-suited for step-by-step system upgrades. It also supports optional remote volume control.

Despite its compact size, it supports 100W×4ch at 4Ω and 130W×4ch at 2Ω. It may be a good option if a small amplifier isn’t quite enough, but it’s difficult to secure installation space for a large amplifier.

Choose an amplifier that includes installation and adjustment

A DSP amplifier isn’t something you simply install and call it done. The final result varies depending on the input method, the speaker combination, gain and crossover settings, and adjustments made to match how it sounds in your specific cabin.

At LOGON, we review your vehicle model, factory system, and your current audio concerns, and then think together about how to incorporate the D2 100.4 DSP. Are you going to pair it with speaker replacement? Or will you first make the most of the factory speakers? Will you configure it with future expansion in mind? You don’t need to change everything all at once.

This DSP amplifier packs into a small body both functions for tuning your sound and room for system expansion. If you want to make the audio in your car even more solid, tell us about your current system and the music you want to listen to. Let’s think together about a configuration that fits how you’ll use it.

Main Specifications / Specs

【Basic Information】

• Product name: D2 100.4 DSP
• Type: DSP with built-in 4ch digital amplifier

【Amplifier Output】

• Rated output: 100W × 4ch (4Ω)
• Rated output: 130W × 4ch (2Ω)

【Inputs】

• High-level input: Supported
• Low-level input: Supported
• Input auto-detection function: Built-in

【DSP Adjustment Functions】

• Equalizer adjustment
• Crossover adjustment
• Time delay adjustment
• Bandpass support
• Q adjustment: 0.5 to 40
• Phase adjustment
• Delay adjustment

【Outputs / Expansion】

• Line output after digital correction: Supported
• Line output: CH5/6
• Remote volume control: Optional support

【Size / Weight】

• External dimensions: 150 × 140 × 40 mm
• Weight: Approx. 1 kg