A high-speed camera pointed at the head unit gives real numbers instead of claims.
Tools required
Tool one, tool two.
Before you start
The warning that saves someone a repair bill.
Step 01 — The test rig
What to do, and what it should look like when it is right.
Step 02 — What the numbers mean
What to do, and what it should look like when it is right.
Step 03 — Results, adapter by adapter
What to do, and what it should look like when it is right.
If it goes wrong
The two or three most likely mistakes and how to undo them.