According to Microtech Gefell, the new M 330 is recommended for choir, grand piano, percussion overhead, plucked and stringed instruments, as well as for sound reinforcement applications even under acoustically demanding conditions, such as high reverberant spaces. As a wide cardioid, this new model sits between omnidirectional and cardioid polar responses, while its response still provides all the know benefits of cardioid microphones, including maximum cancellation at an angle of 180°, although the rear cancelation is less pronounced in the M 330.
Like all microphones in the M 300 series (M 300/cardioid, M 310 /supercardioid, M 320/ omnidirectional), the new M 330 is a compact studio-quality condenser microphone. Its small diaphragms deliver a wide, smooth, frequency response that is practically linear for a wide range of sound incidence and have a smooth treble boost, rising to about 3dB between 6 and 10kHz. The bass end is excellent for pressure-gradient microphones, with the -4dB point being at a low 20Hz for the M 300.
Even though the design of the M 300 series resembles that of most other small-diaphragm condenser microphones, there are some significant differences. Inside the microphone's housing, the gold-coated 16mm mylar diaphragm is protected by a ceramic capsule, instead of metal, in order to ensure better temperature stability. The capsule design itself is the result of Microtech Gefell's large experience in the development of robust and highly sensitive test and measurement microphones.
The openings on the microphone capsule in the M series are protected by a unique three-layer wire mesh on the front side, and a two-layer mesh on the rear. And all electronic circuits and bias adjustments use the company's sophisticated technology, including a new low-noise, hybrid integrated circuit and transformerless design with an extremely wide dynamic range, very low self-noise, and high operational stability.
Like other models in the M 300 series, the new M 330 microphone connects via a 3-pin XLR connector and requires 48V phantom power according to IEC 286-15. To ensure the highest quality, the phantom power is boosted significantly via a DC/DC converter. This high polarization voltage enables impressive sound pressure levels and reduces the inherent noise to a minimum. In addition, the polarization voltage is delivered to the capsule via an optocoupler, which decouples the supply, reduces ripple, and virtually eliminates phantom power noise and/or spurious noise.
According also to Microtech Gefell, by supplying pure DC power to the capsule, these microphones feature lower inherent noise, superior protection from radio interference, and overall improved performance. All electronics in the M 300 series are based on this special, optically-isolated power supply technology, in which a high-intensity LED fed directly from phantom power exposes a photocell that drives the mentioned DC-DC converter. This innovative approach isolates the current rails powering the capsule bias and impedance converter, resulting in very low noise floor. The design effectively replaces the transformer, without the ringing or bandwidth limiting normally associated with those components.
The M 300 series microphones are also available as a stereo set - as a matched pair, complete with MH 93 microphone mounts, stereo rod and carrying strap (except for the M 320, which is supplied without stereo rod and carrying strap).
Microtech Gefell is a manufacturer of high quality, measurement and studio microphones founded 1928 by Georg Neumann. Still today, the company offers calibration and maintenance services to all products ever manufactured by the brand. It's highly specified measurement microphones are available with 1", 1/2" and 1/4" capsules, matched by custom preamplifiers for Lemo, ICP, 48V Phantom power (XLR), and Digital AES42 (USB and XLR) connectors. The company offers a vast range of solutions for outdoor and sound level measurement applications, microphone arrays, sound intensity probes, power supplies, calibration devices as well as turnkey solutions (e.g. special test benches for car acoustics).
www.microtechgefell.de
