Sonifex S2-OMS Studio Monitor Channel
The studio monitor channel is optional and is used for the monitoring of various sources on the studio loudspeakers (MONITOR) on a 6.35mm stereo jack socket and studio headphones (PHONES) on a 6.35mm stereo jack socket.
A front panel control is used to vary the monitor level. The studio monitor loudspeaker level can be variable between 0 (cut off) and 10 (max). The output will need to be fed to a suitable power amplifier to drive the loudspeakers. Headphones with impedances of 35 ohms and above can be driven directly from the channel headphone connector on the rear panel.
A four way electronically interlocking switch bank selects the source routed to the speakers and headphones from either of two external inputs (EXT 1, EXT 2), the PGM, or AUD output. The buttons illuminate to show the selected source, PGM and AUD in green, EXT 1 and EXT 2 in red. External inputs can be used for monitoring an off air signal or another studio output.
An illuminated Mute LED shows when a live microphone channel in the studio has muted the speakers. Mute outputs on the remote connector of the AUD output channel can be used to remotely illuminate “Mic Live” lights.
Green illuminated AUTO CUE/PFL buttons adjacent to each level control allow the monitoring of PFL when an input channel has been selected to CUE/PFL, either to the monitors or headphones.
A separate Studio T/B button is provided to allow the presenter/engineer to talk to the studio monitors and/or headphones and internal jumpers allow this talkback to replace or dim the selected source.
A Global Talkback system can be configured to allow every contribution point in the control room and studio to communicate with each other via their microphone and headphones.
Image above: S2-OMS Studio Monitor Channel and Rear.
S2-OMS Studio Monitor Channel and S2-OMC Control Room Monitor Channel.
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Input/Output Impedances |
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| Mic Input: | > 1k5Ω electronically balanced |
| Mono Line Input: | > 20kΩ electronically balanced |
| Stereo Line Input: | > 20kΩ electronically balanced |
| PGM & AUD Output: | < 75Ω electronically balanced |
| Mono Output: | < 75Ω electronically balanced |
| Monitor Outputs: | < 75Ω unbalanced |
| AES Input/Output: | 110Ω |
| S/PDIF Input/Output: | 75Ω |
| BNC Wordclock input: | 50Ω |
Input/Output Gain Range |
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| Mic Input: | Preset pot +13dB to +66dB ref -50dBu, TRIM pot ±12dB |
| Mono Line Input: | Preset pot -6dB to +10dB ref 0dBu, TRIM pot ±12dB |
| Stereo Line Input: | Preset pot -6dB to +10dB ref 0dBu, TRIM pot ±12dB |
| Telco Input: | Preset pot -6dB to +10dB ref 0dBu, TRIM pot ±12dB |
| Telco Output: | Preset pot -6dB to +4dB ref 0dBu |
| Mix Minus Input: | Preset pot -6dB to +10dB ref 0dBu, TRIM pot ±12dB |
| Mix Minus Output: | Preset pot -3dB to +3dB ref 0dBu |
| Digital Input: | 0dBFS = +12dBu on input; TRIM pot ±12dB allowing 0dBu to +24dBu |
| Digital Output: | 0dBFS = +18dBu |
Frequency Response |
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| Mic Input: | 40Hz to 20kHz, -1dB,+0dB (-3dB at 130Hz with HPF in) |
| Line Inputs: | 20Hz to 20kHz, - 0.5dB,+0dB |
| RIAA Input: | 30Hz to 16kHz ±1.5dB RIAA equalised |
Noise (20Hz to 20kHz) |
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| Mic Input E.I.N.: | -129dB with 150Ω source |
| Stereo Inputs (fader down, no routing): | -89dB ref 0dB |
| Stereo Inputs (fader down, one channel routed): | -89dB |
| Stereo Inputs (unity gain, no routing): | -89dB |
| Stereo Inputs (unity gain, one channel routed): | -86dB |
| Stereo Inputs (unity gain, two channels routed): | -83dB |
| Distortion | |
| Total Harmonic Distortion: | 0.015% at 1kHz, 0dB 0.025% at 10kHz, 0dB |
Crosstalk |
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| Inter-channel: | < -90dBu |
| Stereo: | -90dBu at 1kHz |
Equalisation |
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| LF Shelving at 100Hz: | ±7dB |
| HF Shelving at 6.5kHz: | ±7dB |
Range |
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| Pan Range: | off/-3dB centre/off |
| Balance Range: | ±6dB |
Common Mode Rejection Ratio |
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| Mic Input: | > 100dB at 70dB gain |
Digital I/O |
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| Sync Input Sample Rate: | 30kHz - 100kHz |
| Output Sample Rates (Using Onboard Clock): | 32kHz, 44.1kHz, 48kHz, & 96kHz |
| Output Sample Width: | 16, 20, 24 bit (24 bit on V2 ODA/ODP) |
Output |
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| Headphone Output Load: | >45Ω, 400Ω recommended |
| Maximum Output (Analogue): | +26dBu balanced into 2kΩ or greater |
Power |
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| Power (S2-PSU): | Filtered IEC, switchable 115V, 230V, fused, 210W max. |
| Dimensions (S2-PSU): (Raw): |
48cm (W) x 24.3cm (D) x 8.8cm (H) 19” (W) x 10” (D) x 3.5” (H) |
| Dimensions (S2-PSU): (Boxed): |
51cm (W) x 41.5cm (D) x 17cm (H) 20” (W) x 16.3” (D) x 6.7” (H) |
| Weight (S2-PSU): | Nett: 6kg Gross: 7.8kg Nett: 13.2lbs Gross: 17lbs |
| Dimensions (S2-PSUS): (Raw): |
48cm (W) x 23cm (D) x 4.4cm (H) 19” (W) x 9” (D) x 1.7” (H) |
| Dimensions (S2-PSUS): (Boxed): |
55cm (W) x 39.3cm (D) x 8.5cm (H) 21.6” (W) x 15.5” (D) x 3.4” (H) |
| Weight (S2-PSUS): | Nett: 1.58kg Gross: 2kg Nett: 3.5lbs Gross: 4.4lbs |