The ADK Z-251 is a class-A 9-polar pattern large diaphragm valve studio microphone. It is a recreation of the infamous Ela M 251. The current ADK Z-251, is meticulously handcrafted in the USA, and is arguably the closest thing possible to the beautiful silky sound of the classic - just minus the noise! At around 1/3 of the price of the current Telefunken 251, the Z-251 is a steal! Have a listen to some comparisons here.