【ARC Audio KS 300.2 V3 | 2ch power amplifier that’s easy to fit even in limited space】

You’ve swapped your speakers, but you want a bit more headroom in the sound. When you turn the volume up, the vocals and instruments start to feel strained. If that sounds like you, consider the ARC Audio KS 300.2 V3.

The KS 300.2 V3 is a power amplifier that packs the driving power of a 2ch amp into a compact chassis. Even in cars where there isn’t much space to add a large amplifier, it fits into a size that makes it easier to expand your system without hassle.

Its appeal isn’t just that it can make the volume louder—it can move your speakers properly and create more breathing room when you’re listening to music. Vocal expressions and instrument sounds become easier to bring together, so even with songs you already know, you can reduce the “strain” you may feel when you raise the volume.

For front speakers, and for system expansion too

The KS 300.2 V3 is an easy-to-use model as a 2ch power amplifier for front speakers. It’s a good candidate if you want to deliver enough driving power to your speakers, or if you’d like to build a system that steps up from a factory amplifier or a head unit’s built-in amp.

Depending on the system configuration, it also supports bridged connections, so there are options for uses matched to your goals—such as for a subwoofer. However, the connection method depends on the speakers’ specifications and the combination with your existing system. It’s important not to decide based on amplifier output alone, but to organize what kind of sound you want to achieve in the car and choose accordingly.

It includes a crossover function and bass boost, but stronger settings don’t automatically mean better sound. We adjust while listening to the overall system so that bass doesn’t dominate and the blend with the front speakers doesn’t become unnatural.

Installation that makes the most of its compact size

The unit size is approximately 286×203×60 mm. The available mounting locations vary by vehicle model and your current system, but for those who want to add an amplifier yet are concerned about space for large equipment, this is a practical size to consider.

An amplifier isn’t “done” just by fixing the unit in place. Only after considering things like power and signal routing, mounting method, how it will pair with existing equipment, cable handling, and whether it will be easy to inspect or modify later, will it become a system that’s truly easy to use.

Even with the same KS 300.2 V3, the final result will differ depending on the vehicle and installation method. Whether you’re adding only the amplifier to a car with already-replaced speakers, or combining it with a DSP or a subwoofer, the configuration you should choose will also change.

At LOGON, we think together about a sensible combination by checking your current audio setup, the music you normally listen to, your volume preferences, and even how you plan to upgrade the system in the future. If I were you, I wouldn’t decide based on the amplifier specs alone—I’d first make clear what you want to change about your current sound, and then determine the configuration.

If you’re looking for “more body in the sound,” “your speakers were replaced but it’s still not enough,” or “you want to avoid a major overhaul but enjoy your music a bit more seriously,” please consult us—including whether the KS 300.2 V3 is a good fit. We’ll guide you by considering the installation method and adjustments while looking at your actual vehicle and current system.

Main Specifications / Specs

【Basic Information】
Product name: KS 300.2 V3
Brand: ARC Audio
Type: 2ch power amplifier
Amp class: G/H class

【Output】
4Ω: 180W × 2ch
2Ω: 350W × 2ch
Bridged: 700W × 1ch (4Ω)

【Adjustment Functions】
Crossover: 55Hz–5.5kHz (-12 dB/oct)
Bass boost: +16–18 dB (45 Hz)

【Frequency Response】
11Hz–57kHz (measured value)

【Size】
Approx. 286×203×60 mm