Whirlwind THS 4 Talkback Headphone Box

The THS 4 is an all purpose sports announcer console with main and talkback microphone outputs and Mic On/Off, Cough and Talkback switches. The talkback output is line level with a trim control, and the main microphone output remains live on air if power is lost, when dynamic microphones are used.

Two headphone inputs are provided with balanced and unbalanced connections. Each input has a volume control and assign switches for the left and/or right ear, with level adjustments affecting both ears equally. Headphones from 30 to 600 ohms can be driven to full volume.

Type	Sports announcer talkback / headphone console
Mic outputs	Main and talkback
Controls	Mic On/Off, Cough, Talkback
Talkback output	Line level with trim control
Power fail behaviour	Main mic output stays live with dynamic microphones
Headphone inputs	Two, balanced and unbalanced connections
Per input controls	Volume plus left and/or right assign switches
Headphone impedance range	30 to 600 ohms