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 phones 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) 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 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). The main risks with excessively long microphone cables are gradual losses at high frequencies due to the cable capacitance, some reduction in ability to handle very high sound pressure levels, and increased pickup of interference.
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.
Appliations: Recommendations: Speech / Speakers / Vocals On a lectern Conference recording CCM 4 (cardioid) with close-speech guard B 5 D CCM 4 (cardioid) with close-speech guard B 5 D; for close pickup < 20 cm: cardioid with bass rolloff CCM 4P; for close pickup < 10 cm: cardioid with bass rolloff CCM 4XP TV speaker’s table CCM 4 (cardioid) without pop filter at a distance exceeding 40 cm Broadcast studio CCM 4 with PR 120 SV pop filter; SCHOEPS V4 U TV “round table” discussion CCM 4 (cardioid) or SCHO
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 -20 20 CCM 2S CCM 2XS 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 microphone for music and speech, also for use at moderate distance CCM 2XSfor diffuse-field placement (well beyond the reverberation radius*) The actu
Microphone Types Pressure-Gradient Transducers - Wide Cardioids +10 0dB -10 -20 20 CCM 21 50 100 200 500 1k 2k 5k 10k 20kHz 5k 10k 20kHz CCM 21H Frequency response curve CCM 21 – 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) +10 0dB -10 -20 20 50 100 200 500 1k 2k Frequency response curve CCM 21H Uses: CCM 21: oft
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 Uses: often preferred for singing or speaking voices and most instruments; as a spot micro
Microphone Types Supercardioids +10 0dB -10 -20 20 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 polar response – 0° axis is at the microphone’s tip 50 100 200 500 1k 2
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 – figure-8 (”bidirectional”) pattern – clear sound quality, free of coloration – microphone 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 from outer to inner: 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 CCM 5 – mechanically switchable singlediaphragm microphone (omni/ cardioid) – smoother, more extended high-frequency response than most other multi-pattern microphones (e.g.
Microphone Types Microphones for Close Pickup CCM 4 CCM 4(V)P CCM 4(V)XP CCM 4P CCM 4VP Low-frequency response curves of the two microphone types (P and XP) compared to the standard CCM 4 (measured at a 60 cm equivalent distance). CCM 4XP CCM 4VXP from outer to inner: up to 1 kHz 2 kHz These microphones are tailored for people speaking in loud environments, an application primarily all about speech intelligibility. They are therefore used in close proximity and lower frequencies are attenuated.
Microphone Types Microphones for Close Pickup CCM 4P – cardioid pattern – for pickup of speech or music at close range (under 20 cm) – moderate attenuation of low frequencies Frequency response curve CCM 4P CCM 4VP – cardioid pattern, sideadressed – for pickup of speech or music at close range (under 20 cm), otherwise the sound may become “thin“ – moderate low frequency attenuation Frequency response curve CCM 4VP CCM 4XP – cardioid pattern – for pickup of speech or music at close range (under 10cm) –
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 2XS 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 H
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. 160203 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.
