Focal Wiring Looms

Focal Wiring Looms at a glance

• Focal Inside VW Y-ISO T-Harness — plug-and-play head unit adapter for compatible Volkswagen vehicles without a factory amplifier
• Focal Inside BMW Mini Y-ISO T-Harness — 1 m ISO head unit adapter for select BMW and MINI vehicles without a factory amplifier
• Focal Inside Ford Y-ISO T-Harness — head unit adapter for Ford vehicles from 2005 onwards without a factory amplifier
• Focal Inside Citroën/Peugeot Y-ISO T-Harness — head unit adapter for Citroën, DS and Peugeot vehicles from 2016 onwards without a factory amplifier
• Focal Inside Toyota Y-ISO T-Harness — 1 m head unit adapter for compatible Toyota vehicles from 2005 onwards without a factory amplifier
• Focal Inside Nissan Y-ISO T-Harness — 1 m head unit adapter for select Nissan vehicles from 2009 onwards without a factory amplifier
• Focal Inside Renault/Dacia Y-ISO T-Harness — head unit adapter for Renault (from 2000) and Dacia vehicles without a factory amplifier
• Focal Inside 2.1 IMP Harness — 1 m loom connecting the Impulse 4.320 to two front speaker channels and one PSB200 subwoofer
• Focal Inside 2.2 IMP Harness — loom connecting the Impulse 4.320 to two front speaker channels and two ISUB Twin subwoofer channels
• Focal Inside BMW 2.1 IMP Speaker Harness — BMW-specific loom for front speakers and two under-seat subwoofers, BMW vehicles from 2009 onwards
• Focal Inside PW SUP 600 Power Wiring Kit — fused 6 m power cable and 1 m ground cable providing a direct battery feed for the Impulse 4.320 and FIT 9.660
• Focal Inside IMP Extension Cable I/O 150 — 1.5 m input/output extension cable for the Impulse 4.320
• Focal Inside SPK Sim Impedance Simulator — plug-in simulator that maintains the correct load on your audio system when factory speakers are replaced with Focal Inside speakers

Which Focal Wiring Loom should I choose?

Begin with a Y-ISO T-harness that matches your car brand — it connects the Focal Impulse 4.320 or FIT 9.660 to your factory head unit without any cutting. Options cover VW, Ford, Toyota, Nissan, Renault/Dacia, Citroën/Peugeot and BMW Mini. BMW owners should also consider the separate BMW 2.1 IMP Speaker Harness, which uses BMW-specific connectors for front speakers and under-seat subwoofers on vehicles from 2009 onwards.

For speaker and subwoofer wiring, choose the 2.1 IMP Harness if you're running one PSB200 subwoofer alongside two front speaker channels, or the 2.2 IMP Harness for a pair of ISUB Twin subwoofers. You'll also need the PW SUP 600 power wiring kit for the battery feed. Add the IMP Extension Cable I/O 150 if you need extra signal cable length, and the SPK Sim if your vehicle requires an impedance simulator after replacing its factory speakers.