2026 Guangzhou DSPPA Audio Co., Ltd.
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2026 Guangzhou DSPPA Audio Co., Ltd.
2026 Guangzhou DSPPA Audio Co., Ltd.
2026 Guangzhou DSPPA Audio Co., Ltd.

Professional Rack Mountable Digital Stage Box CM21B

  • 16 input channels with high-quality microphone preamps;

  • 8 analog balanced XLR output channels;

  • Ultra-low latency for network transmission;

  • Transmission distance up to 80 m via CAT6 cable;

  • Dual expansion ports, no external expander or router required;

  • Supports remote power-on via digital mixing console;

  • Constructed with high-quality components throughout the unit.

  • Robust and durable design ensures long service life.

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The product is a newly designed, versatile digital mixing console featuring a compact and lightweight structure, comprehensive functions, intuitive operation, and fast, responsive performance.


With seamless integration alongside digital mixing systems and the support of a Chinese-language interface, it is well-suited for a wide range of applications, including live performances, conferences, schools, churches, cultural halls, weddings, concerts, home use, and band setups.


Specifications of Professional Rack Mountable Digital Stage Box CM21B

Model

CM21B

Input

Mic / Line Input: 1-16

Balanced, XLR and 1/4" TRS Connectors

Input Sensitivity (XLR / TRS)

XLR 1.5 mV, TRS 7 mV

Input Analog Gain

-32 dB to +10 dB, 0.6–0.7 dB Step

Max. Input Level (XLR / TRS)

+19 dBu / +29 dBu

Input Impedance (XLR / TRS)

MIC > 5 kΩ, LINE > 10 kΩ

Output

Mix 1–8 AUX Outputs

Balanced XLR

Output Impedance

< 75 Ω

Nominal Output Level

+4 dBu = 0 dB  Meter Reading

Residual Output Noise

-91 dBu

Dynamic Noise

112dB

SNR

XLR ≥ 92dB,TRS ≥82dB

Max. Output Voltage

7VAC  Max

Distortion

<0.0003% (1KhzFull Power)

Frequency Response

20HZ -20KHZ+/ -0.5dB


Latest Conference System Projects

Latest News
Abstract: Meet DSPPA at Booth Hall 1.2, A02+B02 during Prolight + Sound Guangzhou 2026 from May 28–31 and explore our latest professional AV innovations.
19
May
Abstract: The DSPPA Commercial Audio Website is now live—explore the platform.
15
May
Abstract: Visit DSPPA at MITE China 2026 in Beijing from May 14–16 at Booth T019 and discover next-generation professional audio and communication technologies.
08
May
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DSPPA Headquater Factory
DSPPA Headquater Factory
DSPPA Headquater Factory
No.1 Xiahe Rd, Jianggao Town, Baiyun District, Guangzhou, Guangdong, China.
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