The Altec Models M53 and M54
condenser microphone systems
The Altec M53 and M54 are solid-state condenser microphone systems designed to operate with any existing microphone preamplifier having 150 to 250 ohms input impedance and 12V to 50V DC at less than 5 mA. The M53 and M54 systems are identical except for their cartridges. The M53 system is supplied with the 42A cardioid cartridge; the M54 with the 43A omnidirectional cartridge. Obtaining an extra cartridge can provide dual pickup pattern convertibility, resulting in a highly versatile, quality microphone. Both systems include a 201A Base, 177A wind/pop screen, and 189A Slip-On Holder.
The phantom-powered Altec 201A Base features a five-position input pad, which allows the output of the M53 system to be adjusted over a 32-dB range, making it adaptable to virtually any signal level application. The M53 system is ideal in critical sound reinforcement systems as well as in recording and broadcast service.
Photographs and operating instruction scans were provided through the courtesy of Dave Luepke.