【SPC350・650 Rear Luggage Installation Speaker Cable Work for Front 2WAY + R / 3WAY】

When you install a DSP amplifier or an external amplifier in the rear luggage and build a front 2WAY + rear, or front 3WAY system, it’s important how you route the signal lines from the amplifier to each speaker.

In this installation menu, use SAEC SPC-650 for the door speakers and SPC-350 for the other speaker lines, and wire them according to the vehicle’s structure and the system configuration.

Speaker cables may be hidden parts that you don’t usually see, but they are an essential path that delivers the music signal from the amplifier and DSP. If you’ve gone to the trouble of choosing the right speakers and amplifier to fine-tune the sound, planning the wiring from the beginning as well makes it easier to reduce the hassle of removing interior trim later to re-route the cables.

Not only sound quality—also a finished look as a car

With a front 2WAY + rear or front 3WAY setup, the number of required wiring runs increases for each speaker.

You need to install while confirming everything from cable routing to the doors, the relationship with existing wiring, how the interior trim fits, how the cables are secured, and even future maintenance usability. It’s not simply a matter of running the cable through.

Especially the SPC-650: it’s a speaker cable with a conductor cross-sectional area of 1.4Sq and an outer diameter of about 7.5mm. Depending on the vehicle, you may need to pay close attention to available cable-routing space and routing paths, so rather than deciding with a one-size-fits-all method without viewing the actual car, we confirm a practical, low-stress route and perform the installation.

A wiring job intended to improve sound is meaningless if it results in the interior not fitting properly back in place or making maintenance difficult. If it were me, I would proceed while considering not only sound quality but also the finish and ease of use.

Why use SPC-650 and SPC-350 differently

Instead of using the same cable for every speaker line, we use SPC-650 on the door speaker side, and for the other lines we combine SPC-350, taking into account installability and the overall balance of the system.

SAEC SPC-650 is a speaker cable that uses a PC-Triple C conductor. It’s suited to systems where you want to finish the sound while valuing the texture of vocals, fine expressions of instruments, and the sense of lingering reverb—along with adjustments to the speakers, amplifier, and DSP.

Of course, cable alone doesn’t determine everything about the sound. By considering the speakers, amplifier, DSP, processing on the door side, and adjustments tailored to the vehicle interior, it becomes easier to make the change in wiring meaningful.

Install according to the vehicle and system

The number of cables required and the routing paths will vary depending on the vehicle model, speaker configuration, DSP/amplifier installation location, and your planned upgrades in the future.

Whether you choose front 2WAY + rear or front 3WAY also changes the installation details. Therefore, rather than deciding the finer installation methods before checking the actual car, we first confirm the vehicle and system, then organize what can be done and what we recommend, and guide you accordingly.

What your current system needs, and how far you want to build it going forward—let’s think about it together from there, and adjust everything into a reasonable form so you won’t end up needing to redo the wiring later.

■ Main Specifications / Installation Content

【Basic Information】

• Product name: SPC350・650 Rear Luggage Installation for Front 2WAY + R or 3WAY (Includes labor charge)
• Brand: SAEC
• Content: Speaker cable routing work
• Compatible configuration: Front 2WAY + rear, or front 3WAY
• Installation assumption: A system that installs a DSP amplifier or an external amplifier on the rear luggage side

【Cables Used】

• Door speaker side: SAEC SPC-650
• Other speaker lines: Based on SAEC SPC-350, configured according to the vehicle and system content

【SPC-650 Specifications】

• Conductor: PC-Triple C
• Conductor cross-sectional area: 1.4Sq
• Structure: 2-core twisted structure
• Conductor insulation: Polypropylene
• Sheath: Soft PVC
• Cable outer diameter: approx. 7.5mm

【Items to Check During Installation】

• Vehicle model, grade/type, and vehicle specifications
• Condition of the OEM wiring
• Speaker configuration
• DSP/amplifier installation location
• Available cable-routing space to the door
• How the interior trim fits
• Cable securing method
• Planned future system upgrades

※ Depending on the vehicle structure and the condition of the existing system, the cables used and the installation method may change. We will guide you including the final finish while confirming the actual car and the system content.