【SPC350・650｜Speaker Cable Installation for Multi-Systems of 8CH or More】

When you install a DSP amplifier or an external amplifier in the rear luggage area and combine components such as front 2-way, front 3-way, rear speakers, and subwoofers, you will need many speaker cables from the amplifier to each speaker.

In this installation plan, use SAEC SPC-650 for the door-speaker side and SPC-350 for the other speaker lines, and perform wiring according to the vehicle and system configuration. This is a plan that includes the speaker cables and the installation cost.

Wiring tailored to a multi-system of 8CH or more

With front 2-way and front 3-way setups, both the number of required channels and the number of cable runs differ. Moreover, if you add rear speakers or a subwoofer, you must also consider the distance from the amplifier installation location to each speaker, as well as the wiring routes.

By organizing the entire system at the outset, the channel configuration of the DSP amplifier and external amplifier becomes easier to understand, and fine-tuning after installation also becomes smoother.

Not only the performance of the speakers and amplifiers, but also the handling of wiring that delivers the signal to each speaker is an important part of building the system. The cable alone does not determine everything about the sound, but the higher the complexity of the multi-system, the more noticeable the differences in installation—down to cable routing and how it is secured.

Use SPC-650 and SPC-350 in the right places

The basic configuration is as follows.

• Door-speaker side: SAEC SPC-650
• Other speaker lines: SAEC SPC-350
• Compatible with DSP amplifiers and external amplifiers installed in the rear luggage area
• Assumes a multi-system of 8CH or more

SPC-650 is a speaker cable with a solid thickness. When running cables into the door area, you need to install using a reasonable route while checking the vehicle-side structure and the condition of the OEM wiring.

Instead of using the same cable everywhere, we choose appropriately based on the speaker’s assigned frequency band, wiring distance, installation space, future system upgrades, and serviceability. Because these are not visible parts, we also want to prioritize the finish after reinstalling the interior and the ease of future maintenance.

If you install the amp in the rear luggage area, wiring planning is crucial

When you install a DSP amplifier or external amplifier in the rear luggage area, the wiring distance to each speaker becomes longer.

Will it be front 2-way or front 3-way? Will you use rear speakers or a subwoofer? Are you planning to upgrade the system further in the future?

Depending on these factors, the number of cables required and how they are routed will change. Since some vehicles are difficult to add wiring later, thinking through the overall configuration at the initial stage will make it easier to reduce unnecessary work in the end.

The more detailed the sound-tuning system is—such as balancing vocal placement, overlapping instrument ranges, and the connection from bass to mid/high frequencies—the more it matters to create a wiring-ready condition that ensures each speaker is correctly connected.

What it means to have it installed by LOGON

After completion, speaker cables are hardly visible. That is why it is important to plan where to route them, what length to use, and how to secure them.

At LOGON, we consider the installation content while confirming the vehicle model and the condition of the OEM system, the speaker configuration, and the installation location of the DSP amplifier and external amplifier. Rather than simply replacing cables, we propose what is needed for your current system and where it is worth spending money.

If it were me, I would think not only about changes in sound, but also about natural finishing after reinstalling the interior, and wiring processing that you can use for a long time as a vehicle. Since you are combining speakers, a DSP, and an amplifier, we want to arrange even the unseen wiring in a way that is less likely to leave you regretting later.

The installation content varies depending on the vehicle model, the specifications of the OEM navigation, the speaker configuration, and the amplifier installation location. It is more reliable to organize what can be done and what methods we recommend while looking at the actual vehicle, rather than deciding all the details by email alone.

Main installation contents

• Selecting speaker cables
• Installing SPC-650 for the door-speaker side
• Installing SPC-350 for the other speaker lines
• Wiring from the DSP amplifier and external amplifier installed in the rear luggage area to each speaker
• Confirming wiring routes tailored to the vehicle
• Securing and processing the wiring, and restoring the interior
• Organizing the wiring configuration for a multi-system of 8CH or more

Cables used

• SAEC SPC-650

  • Conductor: PC-Triple C
  • Conductor cross-sectional area: 1.4Sq
  • Structure: 2-core twisted structure
  • Insulation: Polypropylene
  • Sheath: Soft PVC
  • Cable outer diameter: φ7.5mm

• SAEC SPC-350

  • We will provide guidance on the number of cables used and the specific installation details after confirming the vehicle and system configuration.

This is an installation plan suited for people who plan to install an amplifier in the rear luggage area with a multi-system of 8CH or more, or for those who want to arrange the wiring with future system upgrades in mind. Let’s think together about a wiring method that is practical and appropriate for your vehicle and configuration.