【KEY200.4｜4ch DSP Amplifier to Fine-Tune OEM Audio】

You want to hear the sound from your factory audio a bit more clearly. You want the vocals brought forward. Increasing the volume makes it easier to listen, but at your usual volume it feels just a little lacking.

That’s where the KEY200.4 4ch DSP amplifier comes in.

This product isn’t an amplifier that simply makes the sound louder. With its built-in DSP, it balances the frequency range for each speaker and also adjusts differences in how far sound reaches inside the cabin. Using a 40-band equalizer, time alignment, and a 24dB/oct crossover, it’s designed to draw out the potential of your OEM speakers.

After installation, the placement of the vocals may become easier to identify, and instrument sounds may blend less, so even familiar songs can sound different. You can make vocals easier to hear without turning the volume up, making it ideal for enjoying music during long drives.

Because it also supports automatic calibration using a dedicated microphone, it’s easy to get started even if you’re not used to making fine adjustments. However, results will not be exactly the same for every vehicle, even with auto calibration. The final sound will vary depending on the specifications of the OEM system, the condition of the speakers, and how the vehicle is used.

At LOGON, we consider the necessary configuration while checking compatibility with your vehicle’s OEM audio and existing systems. If I were setting it up, I wouldn’t decide only the amplifier first. I’d confirm which parts you find lacking in your current sound, and what kind of sound you want to listen to going forward—then choose the combination accordingly. This is the part where we want to finish everything so you can use it comfortably, including installation and wiring, all the way to the final sound tuning.

It’s also a good candidate if you want to improve the sound a little, but not to the extent of replacing the OEM speakers. Since the proposal will change depending on the vehicle model and the specifications of the OEM audio, let’s decide the direction together while looking at the actual car.

Main Specifications / Specs

【Basic Information】

• Product name: KEY200.4
• Type: 4ch DSP amplifier
• Number of channels: 4 channels

【Output / Performance】

• Rated output: 50W × 4 (4Ω)
• Frequency response: 20Hz to 20kHz
• Signal-to-noise ratio: 90dB

【DSP / Tuning Functions】

• 40-band equalizer
• Time alignment adjustment
• Automatic acoustic tuning function
• Electronic crossover: 24dB/oct
• Crossover setting: High-pass or All-pass
• Crossover frequencies: 60Hz / 80Hz / 120Hz

【Input】

• Input sensitivity: 250mV to 10V

【Dimensions】

• Approx. 70 × 43 × 187 mm