The TS-770 is a Central unit for TOA Conference system, of which compact design makes it easy to install and store. Use of its line connection terminals permits connections to the conference units of TS-771, TS-772, and TS-775, making up a conference system. Up to 3 Central units can be connected.

Power Source	230 V AC, 50/60 Hz
Power Consumption	Max. 60 W
Rated Output	35 V DC, 650 mA × 2
Input	MIC: -60 dB*, 600 Ω, unbalanced, phone jack AUX: -20 dB*, 10 kΩ, unbalanced, phone jack
Output	Recording: -20 dB*, 10 kΩ, unbalanced, phone jack, pin jack × 2
Equalizer Insertion Input Terminal	Input: -20 dB*, 10 kΩ, pin jack Output: -20 dB*, 10 kΩ, pin jack
Expansion Input and Output Terminal	Input: -20 dB*, 10 kΩ, pin jack × 2 Output: -20 dB*, 10 kΩ, pin jack × 2 Control: 10 kΩ or more, voltage output, pin jack × 2
Control	Priority speech chime: Operation of TS-771’s priority button activates a single-tone chime Speaker restriction: Number of simultaneously-usable TS-772s and TS-775s can be set to 1, 3, or 6 Automatic Mic-off: Function OFF/20 s/40 s (selectable)
Number of Connectable Conference Units	70 (Max. 35 units per line), Max 210 (when 3 expansion amplifiers)
Operating Temperature	0℃ to +40℃ (32゜F to 104゜F)
Operating Humidity	Under 90% RH (no condensation)
Finish	Panel: Aluminum, hairline, black Case: Pre-coated steel plate, black, 30% gloss
Dimensions	210 (W) × 107.1 (H) × 316 (D) mm (8.27″ × 4.22″ × 12.44″)
Weight	4 kg (8.82 lb)
Accessory	Power cord (2 m (6.56 ft)) …1
Option	Extension cord: YR-770-2M, YR-770-10M