Schoeps LP 40 U Active Low-Pass Filter for omnidirectional microphones to combine with pressure gradient transducers
The low-frequency response of any directional microphone is inherently inferior to that of omnidirectional (pressure) microphones. When using directional microphones, one can extend the low-frequency response by adding in signals from omnidirectional microphones that have been low-pass filtered with a device such as the LP 40.
- for adapting the signal from a pressure (omnidirectional) microphone to fill in the bass region of directional microphones (especially with the OCT system)
- for phantom-powered microphones
Application
The LP 40 filter is designed to extend the frequency response of the SCHOEPS supercardioid (MK 41(V) or CCM 41(V)) with the lowest possible ripple. This makes it ideal for use with the OCT front surround system; it can also be used to extend the response of directional microphones with other patterns.
User Guide
Specifications
| LP 40 U |
| Filter(s) |
in-line low-pass, critical damping, 12 dB/octave |
| Cut-off frequency (-3dB) |
40 Hz |
| Output impedance |
at 1 kHz: 40 Ω |
| Maximum output voltage |
1 V |
| Diameter |
20 mm |
| Length |
94 mm |
| Surface finish |
Nickel |
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