Off With Their Heads!
Lawson Quick Change™ Capsule System

Lawson microphones were designed with versatility at the core. From the very first prototype to current production models, Lawson capsules and head assemblies have been interchangeable. We call it the Quick Change™ Capsule System. It takes a couple of minutes to swap out a Lawson capsule using no special tools. Your L251 can become an L47MP and vice versa.
Here's how it works. There are three Phillips-head screws that attach the head to the microphone electronics (one on each side of the Lawson logo and one in the back). The head interfaces to the microphone electronics via a D-connector. Simply remove the three screws, pop off the head, put on a different head by mating the connectors, and reinsert the screws. It's that easy!
With the Lawson Quick Change™ system, two microphones become four. For instance, if you have the L251 and the L47FET, by swapping the heads you now have the L47MP MKII and the L251FET. You have the sound of all four microphones: the L251 tube mic, the L47MP MKII tube mic, the L251FET and the L47FET.
Check out the Lawson Tube/FET Combo!