
Mic/Line Analog Input Card
4 input
Four channels of switchable microphone and/or line-level analog audio input with 48 V phantom power as well as high-quality preamplification and A/D conversion.


The QSC CIML4 is a four-channel Mic/Line input card for Q-SYS systems, providing high-quality audio capture with flexible gain control and reliable signal processing. It’s ideal for integrating microphones, line-level sources, and external audio devices into scalable commercial AV installations.
Data sheets, manuals and resources for the CIML4

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The QSC CIML4 is a four-channel Mic/Line input card for Q-SYS systems, providing high-quality audio capture with flexible gain control and reliable signal processing. It’s ideal for integrating microphones, line-level sources, and external audio devices into scalable commercial AV installations.
| DESCRIPTION | Mic/Line Input Four channels of microphone / line-level analog audio input with 48V phantom power |
| PERFORMANCE | |
| Dynamic Range Unweighted | > 105 dB |
| Dynamic Range A-weighted | > 108 dB |
| Distortion 20 Hz–20 kHz +4 dBu (nominal input) | < 0.009% THD+N |
| Distortion 20 Hz–20 kHz 2dB below clip (max) | < 0.08% THD+N |
| Crosstalk 20 Hz - 20 kHz | |
| Inter-channel (max) | > 100 dB |
| Inter-channel (typ) | > 110 dB |
| Intra-channel (max) | > 100 dB |
| Intra-channel (typ) | > 110 dB |
| Frequency Response 20 Hz–20 kHz (max) | ± 0.5 dB |
| Frequency Response 20 Hz–20 kHz (typ) | ± 0.2 dB |
| Input Impedance Balanced (nominal) | 10 kΩ |
| Input Impedance Unbalanced (nominal) | 10 kΩ |
| Common Mode Rejection 20 Hz – 20 kHz (max) | > 45 dB |
| Common Mode Rejection 20 Hz – 20 kHz (typ) | > 50 dB |
| Max Input Level | 0.123, 2.25, 8.70, 17.35 Vrms, -16, 10, 21, 27 dBu, 18.2, 7.04, 18.8, 24.78 dBv, (4 selections) |
| Mute | Infinite attenuation (via digital mute) |
| AUDIO CONVERTERS | |
| Analog to Digital Conversion (ADCs) | 24-bit delta-sigma at 48 or 96 kHz sample rate |
| Group Delay | < 13 samples (≈ 271 μs) at 48 kHz |
| CONNECTORS | Four 3-terminal Euro-style detachable terminal blocks |
| USER-CONFIGURABLE OPTIONS(software enabled) | |
| Phantom Power | +48 V phantom power (meets IEC 1938 [1996] spec) |
About Penguin Media Solutions
Penguin Media Solutions is a professional audio, video, and lighting design, installation, and maintenance company based in Brighton, UK. As an authorised Martin Audio dealer, we provide high-performance AV systems for commercial venues, hospitality, and event spaces across Brighton, London, and South-East England.
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