Cartronix CTX-3418 | Antenna adapter cable with phantom power | DIN to ISO

Are you replacing the original radio in a Volkswagen, Audi, or SEAT from the 1997–2001 model years? You will often notice that the new aftermarket radio no longer has radio reception. This is because these vehicles use an active antenna that requires power via what is known as phantom power.

The Cartronix CTX-3418 has been specially developed to solve this problem. This adapter cable ensures that your original antenna continues to function correctly – with amplified reception and a seamless transition from ISO to DIN.

Why choose the CTX-3418?

✔ Solution for loss of reception – Ideal for radio replacement
✔ For cars with an active antenna (phantom powered) – Powers the antenna via the blue wire
✔ ISO to DIN – Enables the transition from the original antenna system to the DIN standard
✔ Simple Plug & Play installation – No cutting or soldering required

Typical applications

• Installation of an Android or CarPlay radio in a Volkswagen, Audi, or SEAT from 1997–2001
• Fixing poor radio reception after replacing the original head unit
• Connecting an ISO antenna system to an aftermarket radio with DIN
• Maintaining original AM/FM functions with an active antenna

Compatibility

The Cartronix CTX-3418 is universally applicable in vehicles with an ISO antenna connection and an active antenna (phantom power). This is mainly found in:

• Volkswagen: Golf 3/4, Polo, Passat, Lupo, Sharan, Bora
• Audi: A3, A4, A6, TT (up to 2001 model year)
• SEAT: Ibiza, Leon, Toledo, Cordoba (1997–2001)

Check your system beforehand to ensure compatibility.

Technical specifications

• Article code: CTX-3418
• Connection: ISO female → DIN male
• Power supply: 12V phantom power via blue wire (ACC or ANT connection)
• Support: AM and FM radio
• Length: approx. 30 cm
• Compatible with: Aftermarket radios from any brand

Package contents

• 1x Cartronix CTX-3418 antenna adapter cable with phantom power

Why choose the Cartronix CTX-3418?

In older VAG models, antennas are often powered directly via the original radio. As soon as you replace it with a modern system without phantom power, the antenna simply stops working. The CTX-3418 restores that functionality and ensures crystal-clear reception – without any hassle and without compromises.