The TS-690 is a central unit for the TOA Conference System, TS-690 Series. It allows for easy connection to conference units like the TS-691L and TS-692L, forming a complete conference system tailored to your needs. The unit can also be mounted in an EIA Standard equipment rack using an optional rack mounting bracket, occupying 2U space.

### Specification:
– **Power Source**: 220 – 240 V AC, 50/60 Hz
– **Power Consumption**: 20 W
– **Rated Output**: 36 V DC, 480 mA
– **Input**:
– MIC: -60 dB*, 600 Ω, unbalanced, phone jack
– AUX: -20 dB*, 10 kΩ, unbalanced, phone jack
– **Output**:
– Recording: -20 dB*, 10 kΩ, unbalanced, RCA jack
– **Number of Connectable Units**: Max. 24 units
– **Control**:
– Priority speech chime: Operation of TS-691L priority button activates a single-tone chime
– Speaker restriction: Number of simultaneously-usable TS-692L can be set from 0-3
– Automatic Mic-Off Function: OFF, 30s (selectable)
– **Operating Temperature**: 0 °C to +40 °C (32 °F to 104 °F)
– **Operating Humidity**: 90 %RH or less (no condensation)

### Design:
– **Panel**: Aluminum, black, 30% gloss, paint
– **Case**: Steel plate, black, 30% gloss, paint

### Dimensions:
– 420 (W) x 96.1 (H) x 222.5 (D) mm (16.54” x 3.78” x 8.76”)

### Weight:
– 2.7 kg (5.95 lb)

### Accessories:
– Power Cord (2m) x 1

### Options:
– Extension cords: YR-780-2M, YR-780-10M
– Rack mounting bracket: MB-23B