Clear-Com 4-Channel 2RU Switchboard Main Station - SB-704

4-Channel 2RU Switchboard Main Station

• Supports up to 55 beltpacks or 10 speaker stations on 4 channels
• 10 x 4 assignment switching matrix
• Automatic short-circuit protection and reset with LED indicators
• Visual and audible call signaling
• 3 interruptible IFB channels
• Individual volume controls for each channel
• Channel linking
• Remote Mic Kill
• Stage Announce with relay
• External switchable line termination on each channel
• Universal voltage power supply

• Input Type: Electret
• Input Impedance: >=2K
• Mic Limiter Threshold: 0dBu ±3dB
• Mic Limiter Range: >= 15dB

• Input Type: Dynamic
• Input Impedance: >= 1K
• Mic Limiter Threshold: 0dBu ±3dB
• Mic Limiter Range: >= 15dB

• Maximum Level before Clipping: >= 20dBu
• Input Impedance: >= 5K

• Load Impedance: >= 8 Output
• Impedance: <= 25
• Output Limiter Threshold: +5dBu ± 3dB
• Maximum Output Level before Distortion: >= 17dBu

• Load Impedance: >= 4
• Max Output Level before 1% Distortion: 20dBu ± 2dBu

• Output Noise: < -74dBu
• Output Impedance: >10K

• Crosstalk: < -60dB
• Max level before Clipping: >= 12dBu Sidetone Null Capability: > 25dB

• Type: Balanced
• Output Impedance: >= 200
• Load Impedance: >= 600

• Type: Unbalanced
• Output Impedance: 150
• Impedance: >= 600

• Panel Mic – Partyline: 600 – 10KHz ± 3dB
• Headset Mic – Partyline: 200 – 12KHz ± 3dB
• Headset Mic – Line Out: 200 – 12KHz ± 3dB
• Program Input – Partyline: 100 – 17KHz ± 3dB
• Program Input – Headset Out: 200 – 10KHz ± 3dB
• Program Input – Speaker Out: 300 – 10KHz ± 3dB
• Partyline – Headset Out: 200 – 10KHz ± 3dB
• Partyline – Speaker Out: 300 – 10KHz ± 3dB

• Panel Mic – Partyline: <= 0.5%
• Headset Mic – Partyline: <= 0.5%
• Headset Mic – Line Out: <= 0.5%
• Program Input – Partyline: <= 0.2%
• Program Input – Headset Out: <= 0.2%
• Program Input – Speaker Out: <= 0.5%
• Partyline – Headset Out: <= 0.2%
• Partyline – Speaker Out: <= 0.5%

• Panel Mic – Partyline: < -65dBu
• Headset Mic – Partyline: < -70dBu
• Headset Mic – Line Out: < -55dBu
• Program Input – Partyline: < -85dBu
• Program Input – Headset Out: < -60dBu
• Program Input – Speaker Out: < -60dBu
• Partyline – Headset Out: < -50dBu
• Partyline – Speaker Out: < -50dBu

• Panel Mic – Partyline: >= 37dB
• Headset Mic – Partyline: 41dB ± 2dB
• Headset Mic – Hot Mic Out: 55dB ± 3dB
• Headset Mic – Announce Out: 55dB ± 3dB
• Program Input – Partyline: >= -16dB
• Program Input – Headset Out: >= 18dB
• Program Input – Speaker Out: >= 24dB
• Partyline – Headset Out: >= 34dB
• Partyline – Speaker Out: >= 40dB

• Panel Mic – Partyline: <= 25dB

• Input Voltage Range: 100 – 240 VAC
• Input Frequency Range: 50 – 60 Hz
• Input Power: <= 60
• VAC Output Voltage: 30 VDC ± 0.5V
• Output Current per Channel (Continuous): 1.2 A
• Output Current per Channel (Peak): 2 A (Do not exceed the 1.2A rating for more than 2 seconds per 1 minute period)
• Short Circuit Recovery Time (1st short):<= 0.5 sec
• Short Circuit Recovery Time >= 20 shorts in 20sec):<= 20 sec

• 32 – 122°F (0 – 50°C)

• 3.5 x 19 x 10.5 in (HxWxD)
• (88 x 483 x 267 mm)

• 10.9 lbs (4.9 kg)