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User Manual for Schoeps BLM 3g Boundary Layer Microphone Capsule Click to enlarge the picture
Contents of the user manual for the Schoeps BLM 3g Boundary Layer Microphone
- Product category: Boundary Microphones Schoeps
- Brand: Schoeps
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Schoeps Boundary Microphones
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User manual for the Schoeps BLM 3g Boundary Layer Microphone contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Schoeps product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Schoeps user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Schoeps product will considerably shorten its lifespan!
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Product description The matte gray BLM 3g Boundary Layer Microphone Capsule from Schoeps is used to capture audio in critical applications such as TV, film sound, stage dialogue and more. It features a pressure transducer that offers high signal-to-noise ratio and stable performance. The plate of the BLM 3g is only 5mm thick and the transducer is not mounted at its center. The edges of the plate have little effect upon the sound pickup. Off-axis sounds encounter very little frequency discrimination. Sound coloration is low, even for moving sound sources because the frequency response is essentially the same for all angles within the hemispherical pickup pattern. The capsule itself and the electrostatic pressure transducer is inherently insensitive to wind and vibration. The BLM 3g is comparatively heavy compared to other mics of this kind so it picks up very little solid-borne noise. For example, when footsteps are recorded, most of the sound reaching the microphone will be conducted through the air rather than the floor. The BLM 3g resembles any other microphone capsule of the Colette series in that it needs a microphone amplifier (e.g. CMC, CMD 2 U or M 222) to form a complete microphone. This allows active accessories such as the low-cut filter (CUT 1 or CUT 2) and the Active Cable (KC) to be added as well. - Placement at an Acoustic Boundary
- In practice, the plate in which the small transducer of the BLM 3g is mounted assures reflection of only the high and medium frequencies. To reflect sound at lower frequencies the dimensions of the surface must be correspondingly larger. So the microphone should be placed on a floor, wall or ceiling, or mounted on another surface large enough to reflect the lowest frequencies of interest.
- Hemispheric Pattern Independent of Frequency
- When pressure transducers are used, the result is a hemispherical directional characteristic that is independent of frequency; thus it is not necessary to aim the microphones and if the angle of sound pickup changes, the sound quality remains essentially the same.
- Low Frequency Reproduction
- In theory an ideal transducer of this type would have a membrane of infinitesimally small size, and would be mounted flush with an infinitely large, perfectly sound-reflecting surface. In practice, the plate in which the small transducer of the BLM 3g is mounted assures reflection of only the high and medium frequencies. To reflect sound at lower frequencies (greater wavelengths), the dimensions of the surface must be correspondingly larger. So the microphone should be placed on a floor, wall or ceiling, or mounted on another surface large enough to reflect the lowest frequencies of interest.
- Suited for Orchestral Recording
- Typical applications include pickup of stage dialogue, or in orchestra pits, as an ambience microphone and for special public address applications. Since the microphone may well be used on the floor, the likelihood of damage from its being stepped on has been reduced by careful design and construction. As a rule, the capsule will not be harmed by normal footwear.
In the Box Schoeps BLM 3g Boundary Layer Microphone Capsule Limited 2-Year Warranty Table of Contents
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Technical parametersSchoeps BLM 3g Specs | | | Polar Pattern | Omnidirectional | | Frequency Range | 20 Hz to 20 kHz | | Signal to Noise Ratio | 82 dB A-Weighted | | Equivalent Noise Level | 12 dB A-Weighted
23 dB CCIR | | Maximum SPL | 128 dB SPL | | THD | 0.5% | | Sensitivity | 19 mV/Pa | | | | Output Connectors | 1 x 3-Pin XLR | | Operating Current Consumption | 8 mA | | Operating Voltage | 12 V
48 V | | Length | 7.87" / 200 mm | | Weight | 20.11 oz / 570 g |
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