【Zonotone Grandio SP-1 (6.0m)｜In-Car Speaker Cable】

Although swapping the speakers improved the sound, you may want a bit more sound body and spread. You might want the vocals to come forward, and enjoy the spatial relationships between instruments and the stage feel more naturally.

When that’s the case, consider the speaker cable that delivers the audio signal to your speakers. Grandio SP-1 (6.0m) is Zonotone’s in-car speaker cable for anyone who wants to rethink the expressive power of the entire audio system through a cable swap.

The sound Grandio SP-1 aims for: richer body and wider soundstage

Grandio SP-1 combines five types of conductor materials:

• Ultra-high-purity 7N class Cu
• High-performance pure copper wire HiFC
• High-purity oxygen-free copper wire PCUHD
• Tin-plated high-purity copper
• High-purity oxygen-free copper OFC

By combining different materials, the design targets not only higher sound density and impact, but also a finished sound that is mindful of the soundstage’s width and sense of depth.

When you actually integrate it into the system, it’s a candidate when the sound feels a bit thin and you want to bring out the presence of the vocals and instruments one more level. Of course, it helps when you turn it up to enjoy sheer impact—but it’s also the type that makes it easier to feel the overall musical thickness and the way the sound connects smoothly when listening calmly to your usual tracks.

Don’t just consider a cable swap—also check compatibility with the whole system

A speaker cable doesn’t produce the same change in every vehicle just because you replace it.

The final result varies depending on the overall system combinations—speakers, amplifier, DSP, existing wiring, connection methods, and in-car adjustments, to name a few. To take full advantage of the cable’s performance, it’s important to have installation tailored to the vehicle, including cable routing and terminal processing.

If it were me, I wouldn’t decide on a cable swap right away just because I’m dissatisfied with the sound. There are cases where it’s better to first confirm what’s missing in your current system, and then review the speakers, amplifier, and settings.

Whether Grandio SP-1 is a good match also depends on the vehicle model, audio configuration, the music you listen to most, and the sound you’re aiming for.

At LOGON, create sound while considering even the meaning of the change

At LOGON, rather than simply installing a product on its own, we work with you to think—looking at your car—about whether a cable change is actually necessary in your current setup, and if so, where you should start making adjustments.

For those who want to enhance sound body and stage feel, or for those who want to draw out more of what the speakers and amplifier can do, replacing the speaker cable—including the Grandio SP-1 (6.0m) may be an effective option.

Installation details and connection methods must be confirmed for each vehicle. We won’t push an exchange just because—so please tell us what parts you’re concerned about in your current sound. While we ask how you’d like to enjoy your usual songs, we’ll guide you—including the order of changes—so you don’t end up later thinking, “I should have done something else first.”

Main Specifications / Specs

[Basic Information]

• Product name: Grandio SP-1 (6.0m)
• Brand: Zonotone
• Type: In-car speaker cable
• Cable length: 6.0m

[Conductor Materials]

• Ultra-high-purity 7N class Cu
• High-performance pure copper wire HiFC
• High-purity oxygen-free copper wire PCUHD
• Tin-plated high-purity copper
• High-purity oxygen-free copper OFC

Let’s think together about sound tuning that gives real meaning to a cable replacement, while keeping the balance across the entire system in mind.