Used Shure SCM268 4-Channel Rackmount Microphone Mixer

SKU: US1951504 MFR: SCM268
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Shure SCM268 Specifications

  • Measurement Conditions

    (unless otherwise specified): Line voltage 120 Vac, 60 Hz (SCM268) or 230 Vac, 50 Hz (SCM268E); full gain; 1 kHz, one channel activated; source impedances: Mic 150 ohms, Aux Level 150 ohms;terminations: Line 600 ohms, Mic 600 ohms Aux Out 10 kilohms 12 V phantom power off.

  • Frequency Response

    (Ref 1 kHz, controls centered) Microphone Inputs: 150 Hz to 20 Khz +/- 2 dB (built-in 80Hz low-cut) Auxiliary Inputs: 20 Hz to 20 kHz +/- 2 dB

  • Low-Cut Filter (Microphone inputs only)

    3dB down at 80 Hz, 6 dB/octave

  • Gain (typical, controls full clockwise)


    Input: Low-impedance mic 150 ohms: Mic: 38 dB Line: 76 dB
    Aux Out: 65 dB Input: Aux Level: Mic: 3 dB Line: 40 dB Aux Out: 29 dB

  • Inputs


    Input: Mic: Designed for use with: 19-600 ohms, Actual(Typical): 1.2 kilohms Input Clipping Level: -5 dBV
    Input Aux Level; Designed for use with: <2 kilohms, Actual(Typical): 21 kilohms, Input Clipping Level: >28 dBV

  • Outputs


    Output: Mic: Designed for use with: low-Z inputs, Actual (Typical): 0.2 ohms, Output Clipping Level Output: -21 dBV
    Line: Designed for use with >600 ohms, Actual (Typical) 72 ohms, Output Clipping Level: +18 dBV
    Aux Out: Designed for use with: >2 kilohms, Actual (Typical): 870 ohms, Output Clipping Level: +7 dBV

  • Total Harmonic Distortion

    <0.25% at +4 dBu output level: (through 22 Hz-22 kHz filter; Input 1 and Master centered, all other controls full counter-clockwise)

  • Equivalent Input Hum and Noise

    (150 ohm source; through 22 Hz-22 kHz filter): 124 dBV

  • Output Hum and Noise

    (through 22 Hz-22 kHz filter; channel controls full counterclockwise)
    Master full counterclockwise: -92 dBV
    Master full clockwise: -70 dBV

  • Common Mode Rejection

    >80 dB at 1 kHz

  • Polarity

    All inputs to all outputs are non-inverting

  • Overload and Shorting Protection

    Shorting outputs, even for prolonged periods, causes no

  • Phantom Power

    12 Vdc open-circuit through 340 ohm series resistance

  • Operating Voltage


    SCM268: 100-120 Vac rated nominal, 50/60 Hz, 60 mA
    SCM268E: 220-240 Vac rated nominal, 50/60 Hz, 30 mA

  • Temperature Range


    Operating: -7 degrees to 49 degrees C (20 degrees to 120 degrees F)
    Storage: -29 degrees to 74 degrees C (-20 degrees to 165 degrees F)

  • Overall Dimensions

    44 mm H x 218 mm W x 162 mm D (1.72 x 8.60 x 6.37 inches)

  • Net Weight

    1.20 Kg (2 lbs, 10 oz)

8 Accessories for Shure SCM268 4-Channel Rackmount Microphone Mixer

  • All Accessories (8)
  • Cables & Adapters (7)
  • XLR Cables (1)

About Shure SCM268 4-Channel Rackmount Microphone Mixer

Where professional audio quality and versatility meet, the SCM268 4-Channel Rackmount Microphone Mixer by Shure stands out as the quintessential choice for sound engineers and audio enthusiasts alike. With its six robust transformers, this mixer delivers unparalleled protection from RF interference, ensuring an exceptionally quiet performance that is critical in live sound applications. The four transformer-balanced XLR microphone-level inputs, coupled with one transformer-balanced XLR mic/line output, provide high-quality, noise-free audio that professionals demand.

The SCM268's internal low stray field, toroidal power transformer eliminates the need for external power supplies, streamlining your setup and reducing clutter. This feature, along with the mixer's durable and compact half-rack chassis, makes it an ideal solution for space-conscious environments such as meeting rooms, houses of worship, broadcast studios, educational facilities, and sound system rental setups.

The SCM268 is not just about its impressive technical specifications; it's also designed with the user in mind. The solid rack mounting hardware included ensures a secure and stable installation, while the intuitive layout and controls allow for easy operation, making it a reliable tool for both seasoned professionals and those new to audio mixing.

As part of Shure's esteemed "SCM" series of mixers, the SCM268 continues the legacy of delivering quality performance at an exceptional value. Whether you're capturing the nuances of a live concert, managing audio in a theater production, or ensuring clear sound for public address, the SCM268 4-Channel Rackmount Microphone Mixer is a sound investment that promises to enhance the audio experience with its professional-grade features and reliable performance. Choose the SCM268 for a solution that occupies minimal space yet offers maximum audio control, and be wholly satisfied with its superior sound management capabilities.

Shure SCM268 4-Channel Rackmount Microphone Mixer Features

  • Five unbalanced aux level inputs (Phono connectors)
  • LED peak output meter
  • One unbalanced aux level output (Phono connector)
  • IEC power cord connector
  • 12V phantom power for condenser microphones
  • Built-in low cut filters on mic inputs
  • Meeting rooms
  • Houses of worship
  • Broadcast
  • Educational paging and public address
  • Sound system rental

Warranty Information

This used item has a FREE 1-year warranty. See details.