
A speaker cable that delivers both the sound’s contours and its lingering afterglow with care.
【Zonotone Grandio SP-1 (3.0m)|Speaker Cable That Refines the Thickness and Soundstage of Music】
You’ve replaced your speakers, but you don’t feel as much of a sonic change as you expected. When you turn the volume up, the sound seems thinner. You want the presence of vocals and instruments to come through a bit more clearly.
If that sounds like you, consider Zonotone’s Grandio SP-1 (3.0m) speaker cable.
The Grandio SP-1 (3.0m) is a speaker cable designed less to simply brighten and accentuate fine details, and more to make you more easily perceive the music’s density and thickness.
Vocals become easier to hear with the voice’s center and expression, and instruments such as guitars and pianos are less likely to appear laid out flat—allowing you to pay attention to front-to-back positioning and even the lingering reverberation.
It’s suited for those who want to maintain a sense of power from the low end through the high end, while also seeking an expanded soundstage and depth. Even with the songs you listen to every day, this cable can be a trigger that helps you notice subtle vocal expressions and how instruments overlap each other.
Speaker cables don’t change the sound in the same way in every car just because you replace them.
Depending on whether your setup is based on the factory audio, or whether you combine aftermarket speakers, an amplifier, and/or a DSP, the most effective replacement points—and the direction that will suit your system—will vary. The routing of the wiring, the connection method, and the balance with your existing system are also important factors that affect the final result.
If it were me, I wouldn’t decide to replace only the cable by itself right away. First, I would confirm what part of the sound you want to change in your current system. Then, I would consider whether to use it on the front speaker side, whether to review the wiring from the amplifier, and which parts of your current car actually make sense to replace.
To take full advantage of the performance of the Grandio SP-1 (3.0m), it’s important to think not only about product selection, but also about the installation and even confirming the sound afterward. At LOGON, we guide you by looking at the balance of the entire vehicle while listening to the music you normally enjoy and your current complaints.
If you want to further refine the sound after speaker replacement, enhance sound thickness and presence, or you’re unsure where to start making changes in your current system, please feel free to consult us. Rather than recommending a cable replacement unnecessarily, we’ll think together about the approach that will be easier to feel as an improvement in your specific car.
■ Main Specifications / Specs
【Basic Information】
Product name: Grandio SP-1 (3.0m)
Brand: Zonotone
Type: Speaker cable
Length: 3.0m
【Conductor】
Ultra-high purity Cu in the 7N class
HiFC
High-purity oxygen-free copper wire PCUHD
Modern tin-plated high-purity copper
High-purity oxygen-free copper OFC
※ Organized based on publicly available information that could be confirmed.
※ The locations used in the vehicle, the required length, and the connection method will vary depending on the current system and the installation details.
| Cable Type | Speaker cable (2-conductor pair) |
| Product Line | Grandio series |
| Conductor Construction | 5-material hybrid conductor: ultra-high-purity 7N-class copper, HiFC, PCUHD, tin-plated high-purity copper, and OFC |
| Core Count / Conductor Size | 10-core construction, 3.4mm² per conductor group (x2), using the proprietary D・M・H・C method |
| Connector Type | Original Y-lug and banana plug terminations (thick rhodium plating, screw-mount, interchangeable) |
| Shielding | High-density copper braided shielding |
| Length Options | Standard finished pair is 2.0m; custom lengths from 1.0m to 3.5m in 0.5m increments available made-to-order (approx. 2-week lead time) |