Clear-Com SB-440 4 Channel Switchboard

Clear-Com SB-440 4 Channel Switchboard\nThe 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.\n\nFeatures\nFour Independent Intercom Channels- for ultimate flexibility\nMicroprocessor-Controlled Logic- assures maximum communications power\nUniversal Voltage Power Supply- for 90 - 240 VAC operation, with short-circuit protection on each channel\nLinking Control- instantly links channels together in “super party line”\nSeparate Talk and Listen Buttons- for each channel\nIndividual Listen Volume Controls- for each channel\n“All-Talk” Function- permits instant communications to all four channels\nFour Separate Program Inputs- are electronically balanced\nThree Interruptible IFB Channels- make talent cueing easy\n“Announce” Button with Relay- for external paging\nVisual “Call Signaling”- alerts users when others want to speak to them\nWide-Range High-Output Speaker- for optimum clarity in all acoustic environments\n“Hot-Mic” Output- allows easy connection to external IFBs\nAdjustable Mic Proximity Compensation- reduces acoustic feedback\nSuperior “Contoured” Audio- insures excellent voice intelligibility under all noise conditions, including high-noise environments\nSpecifications\nCONTROL SYSTEM: CMOS Digital logic and signal switching\nOVERALL STATION AUDIO:\nBandwidth: 150 Hz -15 kHz\nSignal to Noise: >75 dB\nChannel Separation: > 50 dB\nLine Impedance: Terminating (200 Ω)\nMIC PREAMP:\nInput Level: -55 dBv nominal, -10 dBv max (0 dBv is referenced to 0.775 volts rms)\nImpedance: 200 Ω nominal\nFrequency Response: 150 Hz -15 kHz (contoured for max. intelligibility)\nLimiter Range: 25 dB\nGain Adjust: 5 dB\nHEADPHONE AMPLIFIER:\nLoad Impedance: 50 - 2,000 Ω\nOutput Level: > +20 dBv across 600 Ω\nDistortion: <0.2% THD at 1 kHz\nFrequency Response: 150 Hz - 18 kHz ±2 dB\nSPEAKER AMPLIFIER (SB-440):\nLoad Impedance: 8-50 Ω\nOutput Level: 4 watts into 8 Ω\nDistortion: <0.5% THD at 1 kHz\nPROGRAM INPUTS:\nType: Line level electronically balanced\nNominal Imput Level: -10 dBv\nSTUDIO ANNOUNCE:\nType: Transformer balanced output\nLevel: 0 dB\nRelay: SPDT\nContact Rating: 24 Volts DC @ 1 amp\nELECTRET MICROPHONE (Optional):\nConnection: Proprietary plug-in locking connector\nPattern: Cardioid\nLength: 9" or 18" gooseneck\nFrequency Response: 100 Hz - 20 kHz\nTALK REMOTE CONTROL: Two logic inputs\nPOWER SUPPLY\nType: Switching, with reset circuitry for each channel\nOutput Voltage: 30 VDC regulated\nOutput Current: 2.0 A max.; 1.75 A max. on any channel; with electronic current limiter, circuit breaker protected\nHum and Noise: <-80 dBv\nSYSTEM CAPACITY\n60 beltpacks or 20 speaker stations\nAC POWER REQUIREMENTS\n90 - 240 VAC, 50 - 60 Hz\nDIMENSIONS: 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.\nWEIGHT: 9.7 lbs. (4.4kg)\nCONNECTORS\nHeadset: 4-pin male XLR\nIntercom Lines: Fourteen 3-pin male XLR\nProgram Input: 3-pin female XLR\nAnnounce Output: 3-pin male XLR\nExternal IFB: 1/4" phono jack\nAux: 15-pin DB connector\nExternal Speaker: 1/4" phono jack