CCM Compact Microphones Contents page System overview 2 Compact Microphones 3 Phantom powering 4 EMC, Technical specifications 6 Block diagram 7 Microphone selection 8 Basic microphone characteristics 9 Suggested microphones for specific applications 10 Pressure transducers 11 Pressure-gradient transducers 12 Switchable microphone 16 Microphones for close pickup 17 Acoustic specifications of the microphones 19 Care and maintenance / Troublshooting 20 Warranty / declaration of conformity 22 Compact Series
System Overview – A Selection COMPACT MICROPHONE microphone tubes e.g.
Technology CCM Compact Microphones Dear customer: Thank you for choosing a SCHOEPS CCM Compact Series microphone. CCM microphones are the smallest true classic condenser microphones (no electret used) offering the highest possible sound quality without compromise. The following pages contain technical information, application suggestions and advice concerning the care and maintenance of these microphones. CCM Compact Microphones ...
Technology Phantom Powering Phantom powering amount of current from the phantom supply. Please note that the CCM compact microphones are designed to work with standard 12-Volt or standard 48-Volt phantom powering. They are therefore not ”12 - to - 48 Volt” microphones. Any input to which it is connected must implement one of those two standard phantom powering methods, which means that not only must the supply voltage meet the standard, but the resistors must be correct as well.
Technology Phantom Powering (continued) power supplies below. Phantom powering to standard DIN EN 61938 Correct powering is essential. There have been various myths and misunderstandings about it. Authoritative information is contained in the standards documents, but few people have access to them which is why we are offering this detailed explanation.
Technology EMC, Technical Specifications microphone, and to prevent interference. Maximum Cable Length Cable lengths of up to 300 meters are possible, but the practical limit depends on the electrical capacitance of the cable, which is sometimes an unknown quantity. The lower this capacitance is per unit length, the longer the cable can be. All SCHOEPS cables have very low capacitance (100 pF/m between the conductors).
Pin assignment of the XLR-3M output connector of CCM microphone amplifiers: Pin 1: Pin 2: Pin 3: 7 screen (GND) +phase –phase 1 2 3 Bottom view (as the pins are seen) DC/DC converter Impedance converter Regulator Output stage microphone amplifier +Phase: an excursion of the diaphragm towards the back electrode (positive pressure phase) leads to a positive signal at this pin *Matched (i.e. matching tolerance of only 0.
Recording Microphone Selection Which is the best microphone for ... ? In our opinion a good microphone ought to sound natural, just as you would expect a good audio amplifier to sound; it should therefore be suitable for any instrument. This requires flat frequency response and a directional characteristic independent of frequency. There will be no difference in sound quality whether the pickup is on- or off-axis. Obviously this ideal can only be achieved to a finite degree.
Microphone Types Basic Microphone Characteristics All SCHOEPS microphones, even switchable ones, are single-diaphragm electrostatic transducers. They fall into two general categories: pressure transducers and pressure-gradient transducers. Many of our microphones combine the two principles of operation in various proportions, yielding patterns from wide cardioid to supercardioid. While not strictly correct, these microphones are classed as pressure-gradient transducers by convention.
Speech/ Speakers Applications: Recommendations: On a lectern Conference recording TV speaker’s desk CCM 4 (cardioid) with close-speech guard B 5 D CCM 4 (cardioid) with close-speech guard B 5 D CCM 4 (cardioid), no popscreen required at distances greater than 0.
Microphone Types Pressure Transducers (Omnis) +10 0dB -10 -20 20 CCM 2 CCM 2H 50 100 200 500 1k 2k 5k 10k 20kHz 2k 5k 10k 20kHz Frequency response curve CCM 2 +10 0dB -10 CCM 2S CCM 3 for free-field placement (close to the sound source) CCM 2H for use at moderate distance (at or near the reverberation radius*) CCM 2S all-purpose capsule for music and speech, also for use at moderate distance (at or near the reverberation radius*) CCM 3 for diffuse-field placement (well beyond the rever
Microphone Types Wide Cardioids +10 0dB -10 -20 20 CCM 21 CCM 21H – wide cardioids – polar pattern very well maintained throughout the frequency range – a favorable compromise between omni (good low-frequency response) and cardioid (consistent directional pattern at all frequencies) 50 100 200 500 1k 2k 5k 10k 20kHz 5k 10k 20kHz Frequency response curve CCM 21 +10 0dB -10 -20 20 50 100 200 500 1k 2k Frequency response curve CCM 21H Uses: CCM 21: often preferred for use as a spot m
Microphone Types Cardioids +10 0dB -10 -20 20 50 100 200 500 1k 2k 5k 10k 20kHz Frequency response curve CCM 4 CCM 4 – standard cardioid with clear sound quality, free of coloration – all-purpose microphone for music and speech – highly consistent frequency response – our best-selling compact microphone type – cardioid pattern is maintained even at low frequencies – 0° axis is at the tip of the microphone from outer to inner: up to 1 kHz 2 kHz 4 kHz 8 kHz 16 kHz Polar diagram CCM 4 Uses: of
Microphone Types Supercardioids +10 0dB -10 -20 20 50 100 200 500 1k 2k 5k 10k 20kHz Frequency response curve CCM 41 CCM 41 – all-purpose microphone for speech and music recording of all kinds – well suited for use as the main microphones for stereo pickup and/or as ”spot” microphones – extended, smooth, well-balanced frequency response – often used for film and video sound – where it can be used, it has distinct sonic and practical advantages over most shotgun microphones – highly consistent p
Microphone Types Figure-8 +10 0dB -10 -20 20 50 100 200 500 1k 2k 5k 10k 20kHz Frequency response curve CCM 8 CCM 8 from outer to inner: – – – – figure-8 (”bidirectional”) pattern clear sound quality, free of coloration capsule for M/S and Blumlein stereo highly consistent frequency and polar response – response essentially free of off-axis peaks like a good ribbon microphone (but not as delicate physically) – lateral pickup up to 2 kHz 4 kHz 8 kHz 16 kHz Polar diagram CCM 8 Uses: optim
Microphone Types Switchable Microphone +10 0dB -10 -20 20 50 100 200 500 1k 2k 5k 10k 20kHz Frequency response curve CCM 5 ”omni” position Polar diagram as CCM 2, -2H, -2S, -3 CCM 5 – mechanically switchable singlediaphragm microphone (omni/ cardioid) – smoother, more extended high-frequency response than most other multi-pattern microphones (e.g.
Microphone Types Cardioids for Close Pickup +10 Low-frequency CCM 4 0dB attenuation of standard cardioid cardioids for CCM 4S and CCM 40 -10 close pickup. CCM 4VXS CCM 4A -20 CCM 4S 20 50 100 200 500 1k CCM 40 +10 0dB -10 -20 20 50 100 200 500 1k 2k 5k 10k 20kHz 5k 10k 20kHz Frequency response curve CCM 4S Polar diagram as CCM 4 CCM 4VXS These microphones are tailored for people speaking in loud environments, an application primarily all about speech intelligibility.
Microphone Types Microphones for Close Pickup +10 0dB -10 -20 20 50 100 200 500 1k 2k 5k 10k 20kHz Frequency response curve CCM 4A CCM 4A – cardioid for extremely close pickup (under 10 cm) – 10 dB attenuation compared with the other capsules for close pickup from outer to inner: up to 1 kHz 2 kHz 4 kHz 8 kHz 16 kHz Polar diagram CCM 4A +10 0dB -10 -20 20 50 100 200 500 1k 2k 5k 10k 20kHz Frequency response curve CCM 41S CCM 41S – supercardioid for a pickup distance under 50 cm
Microphone Types Acoustical Specifications of Compact Microphones microphone type polar pattern frequency range sensitivity CCM 2 omni 20 Hz – 20 kHz 16 mV/Pa 23 dB 11 dB 83 dB 130 dB CCM 2H omni 20 Hz – 20 kHz 15 mV/Pa 23 dB 11 dB 83 dB 130 dB CCM 2S omni 20 Hz – 20 kHz 12 mV/Pa 24 dB 12 dB 82 dB 132 dB CCM 3 omni 20 Hz – 20 kHz 10 mV/Pa 26 dB 14 dB 80 dB 134 dB CCM 21 wide cardioid 30 Hz – 20 kHz 13 mV/Pa 24 dB 14 dB 80 dB 132 dB CCM 21H wide cardioid 30 Hz
Miscellaneous Care and Maintenance / Troubleshooting Care of Compact Condenser Microphones Please take care to avoid placing microphones in a dusty environment. Keep them in their cases (e.g. the wood carrying case they come with) when not in use, since any dust that gets inside the capsules can adversely affect their functioning.
Miscellaneous Troubleshooting least two stages – the capsule and the amplifier. The only sound pressure that could overload a SCHOEPS microphone capsule (150+ dB SPL) would also damage human hearing almost instantly; in practice our capsules are rarely overloaded except by explosions or direct exposure to strong wind. As a rule such overload will not damage the microphone; even strong wind blowing directly against the capsule membrane will not harm it unless the forces involved are rather enormous.
Warranty Warranty /Declaration of Conformity – CE-Mark Warranty Declaration of Conformity – CE-Mark We guarantee our products for a period of twenty-four months, excluding batteries. The guarantee period begins on the date of purchase. Please provide your bill of sale in all cases as proof of guarantee; without it, repairs will be undertaken only at the owner’s expense.
For your notes 23 SCHOEPS GmbH · Spitalstr. 20 · D-76227 Karlsruhe (Durlach) · Tel: +49 (0)721 943 20-0 · Fax: +49 (0)721 943 2050 www.schoeps.de · mailbox@schoeps.
Errors and omissions excepted. 131202 SCHOEPS GmbH Spitalstraße 20 D-76227 Karlsruhe (Durlach) Tel.: +49 (0)721 943 20-0 Fax: +49 (0)721 943 2050 Technik www.schoeps.de mailbox@schoeps.