Gefell UM900 & EA92S Suspension Kit

The Tec Award nominated Gefell UM900 'Phantom' is a low-noise large diaphragm vacuum tube microphone with 5 selectable polar patterns that only requires 48V phantom for its operation. The distinctive appearance incorporates form and function, combined with a state-of-the art internal pre-amplifier for exceptional dynamics and detail. The result is a wonderful studio mic that is both easy to use and extremely flexible in operation, while retaining the warmth and smoothness that is associated with a vintage tube mic.

Following the Gefell tradition of great sound without compromise, the 'eye' of the UM900 is the famous M7 dual membrane 1 inch (25mm), 24-karat gold evaporated capsule. Hand made using a PVC substrate, the Gefell M7 continues to set the standard for clarity, detail and reach that today is still unrivalled. The capsule is mounted on a triangulated pedestal behind a large 75mm head-grill. The side address grill differs from the usual cylinder or wedge-shaped design, which results in less field disruption while allowing the user to take full advantage of the 'proximity effect' to enhance the voice. The UM900's distinctive 'bottle-top' look is augmented with a carefully sculpted body that deflects unwanted refractions away from the capsule. This reduces phase cancellation and comb-filtering, which of course yields greater detail at the capsule, all of which play an important role in shaping the sound this microphone. Internal dampening reduces vibration borne noise further optimizes performance.

The heart of the Gefell UM900 is a miniature 'hearing-aid' audio tube and its unique phantom powering system. Using proprietary circuitry, an internal switching power supply generates voltages for the tube's plate and filament as well as the capsule polarizing voltage. Unlike traditional tube microphones, the UM900 Phantom does not require an external power supply box or multi-pair cable. At less than 4-milliamp draw, all that is required is the typical 48V phantom from any console or pre-amp. The clear advantage of 48V phantom powering is freedom.

The Gefell UM900 features three on-board control switches. At the front, a pattern selector switch offers choice of omnidirectional, wide-cardioid, cardioid, hypercardioid and figure-8 providing the user with tremendous options. Two additional control switches located at 120º off each side are used to control gain (-10dB, 0db and +4dB) and low-frequency roll-off (-10dB @70Hz). The unique +4dB gain setting works with the cardioid pattern to provide additional 'reach' in studio or live environments.