German microphone maker Schoeps has introduced a new in-line low-pass filter, the LP 40. It is designed to be added to an omnidirectional microphone to create a fill-in low frequency pickup in conjunction with cardioid and super-cardioid microphones.
No directional microphone is able to pick up frequencies down to as low as 16 Hz as well as high-quality condenser mics with omnidirectional pickup patterns. You can compensate for this by adding the signal of an omni mic which has been filtered with a low-pass filter. The LP 40 has been designed to extend the response of a Schoeps supercardioid (i.e. MK 41) downwards with as little ripple as possible.
Schoeps says the LP 40 is ideally suited for an OCT (front surround, optimized cardioid triangle) system using super-cardioids. When the signal of a Schoeps MK 2 omnidirectional capsule with LP 40 is added to that of an MK 4 (cardioid) or MK 41 (supercardioid) capsule, you get a smooth frequency response down to the lowest frequencies.
Although it is designed to complement the characteristics of Schoeps microphones, the LP 40 can be used with any microphone (with XLR connector) made by any manufacturer.
The LP 40 filter is available at a suggested price of 170 Euros ($160 US).
Shoeps has also announced that beginning in January 2003, the company logo is changing significantly (see new logo above). The new logo focuses attention on Schoeps’ primary interest and manufacturing expertise: microphones. This is the first time the Schoeps logo has changed in more than 50 years.
LP 40 Technical Specifications:
- Filter: low-pass, critical, 2nd order (12 dB/octave)
- Cut-off frequency (-3 dB): 40 Hz
- Output impedance: 40 Ohms @ 1 kHz with SCHOEPS CCM Compact Microphones and CMC Standard Colette microphone amplifiers
- Gain: 0 dB
- Maximum output voltage: ca. 1 V @ 4 mA
- Diameter: 20 mm
- Length: 94 mm
- Suface finish: Nickel
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