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Royal Spirit SP-1 (1.5m)

A speaker cable that brings out the expression of a familiar song with even more care.

【Zonotone Royal Spirit SP-1 (1.5m)|Speaker Cable for Car Audio】

When you listen to your car audio, you want to feel vocal expression and the positional relationships between instruments a bit more clearly. You’d like to increase the amount of musical information, but you’re not at the point of replacing the speakers or amplifier right away.

That’s where Zonotone’s speaker cable Royal Spirit SP-1 (1.5m) comes in.

Speaker cables may not be a conspicuous part, but they are an important component that carries the musical signal from the amplifier to the speakers. If the foundation of the entire system is already in place, re-evaluating the cable may help you notice changes in vocal outline, how instruments overlap, and how the soundstage opens up.

Even with songs you already listen to all the time, vocals may seem a little closer, or the spatial relationships between instruments may become easier to understand. This is a cable designed not just to have sound play right next to the speakers, but to aim for a sense of cohesion that connects naturally throughout the cabin.

Features of the Royal Spirit SP-1

Royal Spirit SP-1 is a new-concept speaker cable developed to commemorate Zonotone’s 10th anniversary.

For the conductor, it uses a new conductor made by combining four types of materials, including ultra-high purity 7N-class Cu, along with HiFC and PCUHD. By combining the characteristics of each material, this model aims to draw out a sense of spaciousness and depth while maintaining the amount of musical information.

In particular, if you have already replaced the speakers or had an amplifier/DSP installation done and you want to fine-tune the overall system’s finishing one step further, there is value in considering a cable replacement.

Changes in sound are not simply things like “the sound got louder” or “the treble got stronger.” They appear in the parts you can notice when listening closely to familiar tracks—such as subtle vocal nuances, instrument decay, and the way sounds layer together. The longer you enjoy music during drives, the more you’ll likely be able to appreciate these kinds of changes.

Cable replacement depends on compatibility with the entire system

Speaker cables won’t produce the same result in every car just because they are replaced.

In addition to the combination of speakers, amplifier, DSP, and factory audio, the final outcome also varies depending on how the cable is routed and how the connection portions are handled, as well as the issues the current system may have. In some cases, it may be better to adjust the sound or review other parts first rather than spending money on cables.

If it were me, I wouldn’t recommend a replacement simply because it’s a “good” cable. I would first confirm what dissatisfaction you have with the current sound, what music you usually listen to, and how much work has already been done on your current system—then consider from the areas where spending money makes sense.

At LOGON, we provide guidance not only for installation, but also for wiring treatment, finishing of connection points, and even checking the sound after installation. Because even the same cable can yield different results depending on where and how it is used, it’s important to proceed while looking at both the vehicle and the entire system.

Royal Spirit SP-1 (1.5m) is suited for people who want to make the soundstage and depth a bit more natural, want to push the finishing even further after replacing the speakers, or want to enjoy their favorite music thoroughly while in the car.

Should you replace the cable, or would it be better to do adjustments or other installation work first? Let’s decide the direction together while checking your current sound.

Main Specifications / Specs

【Basic Information】
Product name: Royal Spirit SP-1
Brand: Zonotone
Type: Speaker cable for car audio
Length: 1.5m

【Conductor】
Conductor material: A new conductor made by combining four types of materials, including ultra-high purity 7N-class Cu, HiFC, and PCUHD

  • Organized based on product information that could be confirmed.
Cable Type

Speaker cable (Royal Spirit series)

Conductor Construction

Proprietary DMHC construction combining four different copper conductor types (ultra-high-purity 7N-class copper, HiFC, PCUHD, OFC) in fully independent 8-strand cores

Core Count / Conductor Size

2.5 sq mm (8 strands) x2 - hot and cold sides each bundled from 8 independent cores

Connector Type

Thick rhodium-plated original Y-spade and banana plug terminals (combination selectable)

Shielding

High-density copper braid shielding

Jacket / Outer Diameter

PVC sheath (EU-RoHS compliant) covered with dual-color nylon braid; approx. 15.0 mm outer diameter

Product Line

Part of Zonotone's 10th-anniversary "Royal Spirit" series (standalone line)

Length Options

Standard 2.0 m pair, with custom lengths available from 1.0 m in 0.5 m increments (price varies by length)

List price¥ 141,350 (Tax included)