The new Mercury M72s [Mk. IV] is our flagship, valve Studio Microphone Amplifier. The M72s is based on the most sought after vintage amplifier module—the Telefunken/Siemens V72s—which is most famous for being installed in REDD.37 consoles, used on all the early Beatles recordings by George Martin at Abbey Road Studios in London, England.
You may notice the new Mercury M72s was stripped of a few vintage inspired, aesthetic extras of the MK II [which is still available as the M72s-CSV, custom shop version] but is still loaded with the same exact tone and warmth utilizing the same exact circuit, same quality parts and same transformers we have used since we started building the first M72s at Mercury Recording Equipment.

The Mercury M72s is based on the module used in consoles which are very rare due to a minimal amount made. The more common V72 amplifier modules (not marked with the lower case s, i.e. V72s) were later modified and have been sold for many years as outboard preamplifiers all over the world. Neither of these amplifier modules have been available new for more than 50 years. So, working units have become extremely rare, very expensive and in some cases are now in need of much repair. Regardless of cost, the uniquely musical tonal characteristics of these amplifiers has made them the prized possession of many engineers lucky enough to get the vintage modules, and a "secret weapon" for many studio musicians.
Mercury Recording Equipment is proud to have a faithful reproduction in the M72s. We have 20+ years of experience with the amplifiers and feel we have captured not only how the units behave, but how they sound overall. We are confident with the addition of modern features, making the M72s much more versatile, without sacrificing the most important feature: Musicality.