A first-generation Line 6 DL4 from the early 2000s, fully checked over in my workshop and ready to use.

As part of the service I:

Opened and inspected the pedal internally

Cleaned the PCB with isopropyl alcohol

Cleaned all potentiometers and the input/output jacks with contact cleaner

Cleaned the enclosure inside and out

Replaced worn knobs and jack nuts where needed for improved usability

I've also made a couple of small practical upgrades that make the pedal easier to use on stage while remaining completely reversible:

Yellow jack nuts fitted to the left-side stereo input and output, making it immediately obvious which black jacks to use for standard mono operation.

Yellow knobs fitted to the Delay Model selector and Mix controls, making the two most frequently adjusted controls quicker to identify at a glance.

Everything functions as it should.

Original Line 6 power supply included in the price.

A great example of one of the most iconic delay pedals ever made, professionally checked over and ready for many more years of use.

Collection from the Canary Wharf area is welcome, or I'm happy to ship securely.