Clear-Com SB-440 4 Channel Switchboard

More Clear-Com products

Write a review Q&A SKU: TZ-SB440
1 of 2
Sale price $750.00 USD
or as low as $20.83 per month. Additional restrictions may apply.

PSSL Loyalty points

You will receive 750 points. Learn more about our loyalty program

Available options

Product attributes

  • Free shipping

Need help? Contact our product specialists.

View full details

Need help? Contact our product specialists.


Clear-Com SB-440 4 Channel Switchboard

The 440 series is Clear-Com’s most advanced party-line intercom system. Each station is a four-channel intercom with superior audio and versatile channel access to provide unmatched communication flexibility. All front-panel controls are intuitive and easy to operate. The station’s front-panel buttons are programmable and can be customized for a wide variety of applications that will meet the demands of any stage, studio, or field producer. Separate volume controls for every channel ensure the perfect audio mix in the headset or on the integral speaker. The SB-440 includes a versatile switching matrix which allows up to ten different groups of stations to be assigned to any one of the four channels. A convenient “link” feature ties all four channels into one giant party line for rehearsal or staff check. The stations have adjustable mounting ears that can be removed for desktop operation. The regulated power supply in the MS-440 and SB-440 provides power for the entire intercom system. These stations have front-panel short-circuit indicators to show if a short has occured on any of the four intercom lines. Other features include separate audio sources for all intercom channels and three built-in IFB program interrupts for talent cuing.


  • Four Independent Intercom Channels- for ultimate flexibility
  • Microprocessor-Controlled Logic- assures maximum communications power
  • Universal Voltage Power Supply- for 90 - 240 VAC operation, with short-circuit protection on each channel
  • Linking Control- instantly links channels together in “super party line”
  • Separate Talk and Listen Buttons- for each channel
  • Individual Listen Volume Controls- for each channel
  • “All-Talk” Function- permits instant communications to all four channels
  • Four Separate Program Inputs- are electronically balanced
  • Three Interruptible IFB Channels- make talent cueing easy
  • “Announce” Button with Relay- for external paging
  • Visual “Call Signaling”- alerts users when others want to speak to them
  • Wide-Range High-Output Speaker- for optimum clarity in all acoustic environments
  • “Hot-Mic” Output- allows easy connection to external IFBs
  • Adjustable Mic Proximity Compensation- reduces acoustic feedback
  • Superior “Contoured” Audio- insures excellent voice intelligibility under all noise conditions, including high-noise environments


  • CONTROL SYSTEM: CMOS Digital logic and signal switching
    • Bandwidth: 150 Hz -15 kHz
    • Signal to Noise: >75 dB
    • Channel Separation: > 50 dB
    • Line Impedance: Terminating (200 Ω)
    • Input Level: -55 dBv nominal, -10 dBv max (0 dBv is referenced to 0.775 volts rms)
    • Impedance: 200 Ω nominal
    • Frequency Response: 150 Hz -15 kHz (contoured for max. intelligibility)
    • Limiter Range: 25 dB
    • Gain Adjust: 5 dB
    • Load Impedance: 50 - 2,000 Ω
    • Output Level: > +20 dBv across 600 Ω
    • Distortion: <0.2% THD at 1 kHz
    • Frequency Response: 150 Hz - 18 kHz ±2 dB
    • Load Impedance: 8-50 Ω
    • Output Level: 4 watts into 8 Ω
    • Distortion: <0.5% THD at 1 kHz
    • Type: Line level electronically balanced
    • Nominal Imput Level: -10 dBv
    • Type: Transformer balanced output
    • Level: 0 dB
    • Relay: SPDT
    • Contact Rating: 24 Volts DC @ 1 amp
    • Connection: Proprietary plug-in locking connector
    • Pattern: Cardioid
    • Length: 9" or 18" gooseneck
    • Frequency Response: 100 Hz - 20 kHz
  • TALK REMOTE CONTROL: Two logic inputs
    • Type: Switching, with reset circuitry for each channel
    • Output Voltage: 30 VDC regulated
    • Output Current: 2.0 A max.; 1.75 A max. on any channel; with electronic current limiter, circuit breaker protected
    • Hum and Noise: <-80 dBv
    • 60 beltpacks or 20 speaker stations
    • 90 - 240 VAC, 50 - 60 Hz
  • DIMENSIONS: 3.5" H x 17" W x 6.75" D (89 x 432 x 171 mm) (19" W with included rack ears) Depth does not include rear panel connectors.
  • WEIGHT: 9.7 lbs. (4.4kg)
    • Headset: 4-pin male XLR
    • Intercom Lines: Fourteen 3-pin male XLR
    • Program Input: 3-pin female XLR
    • Announce Output: 3-pin male XLR
    • External IFB: 1/4" phono jack
    • Aux: 15-pin DB connector
    • External Speaker: 1/4" phono jack


Write a review


Questions & Answers

Ask a question

You may also like

  • PSSL Customer Support Image

    Ask the experts

    Our expert team guides customers towards the best equipment solutions, ensuring unparalleled performance and customer satisfaction.

    Ask an expert here 
  • Financing Options

    We offer flexible financing options, starting at 0% APR. Our financing plans provide customers with the opportunity to acquire top-quality audio, DJ, and lighting equipment with ease and convenience.

    Explore more financing options 
  • Rewards Program

    Join our Rewards Program today and enjoy the benefits of smart shopping!

    Visit our rewards page