- Intercom Electronics
- Intercom with Push-to-Talk
- Mic or Speaker Input
- 8 Ω or 45 Ω Speakers
- Bidirectional Communication Option
The ST-IC1 is the ideal choice where an intercom system is to be installed, or where an amplifier is needed to bring a mic level up to a 1 W speaker level with optional muting capability. The ST-IC1 has one input, one output and two muting control terminals. The input accepts a dynamic mic, a condenser mic (a phantom supply input terminal is provided to power condenser mics), an 8 Ω speaker or a 45 Ω speaker. The gain range of the module is sufficient to accommodate this wide variety of source levels. The output is ground-referenced, and drives more than 1 watt RMS into an 8 Ω load. The output circuit can be connected to any load impedance of 4 Ω or greater. | Frequency Response: | 300 Hz to 4 kHz (+/- 2 dB, filtered for voice band intelligibility) | | Gain: | Off to 70 dB (adjustable) | | Input level for 1 W RMS output: | -60 dBu (8 Ω source); -55 dBu (600 Ω source) | | THD+N: | < 1% (1 kHz, referred to 1 W @ 50 dB gain) | | Residual Noise (below 1 W): | < 75 dB (60 dB gain setting, unmuted) | | Operating Output Power: | 1 W RMS | | Maximum Output Power: | 1.5 W RMS (before clipping) | | Mute Attenuation: | > 115 dB (1 kHz) | | Mute Switching Type: | Solid-State, no relay contacts used | | Mute Release Delay: | 15 ms | | Power Requirement: | GROUND-REFERENCED, 24 to 33 Vdc @ 175 mA | | Ambient Operating Environment: | 0° C to 50° C |
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