Whirlwind THS R Talkback Headphone Box

Whirlwind THS R Talkback Headphone Box

The RTScompatible THS R has both main and talkback microphone outputs. The microphonesignal is always live at the main output unless the Talkback or Cough switch isdepressed. If power to the THS R is lost, the mic signal will still pass withdynamic mics and with condenser mics if phantom power is provided from the hostconsole. Two types of onboard condenser microphone power are available,enabling seamless switching when talkback is activated. A three way switchselects either phantom or “T” power and is recessed to avoidaccidental turn off. A momentary Cough switch silences both the mic out and thetalkback out when depressed. The announcer’s microphone is sent through apreamp and line driver that deliver line level signal to the talkback outputwhen the momentary Talkback switch is activated. The Talkback switch also mutesthe mic out. There is a level control for fine adjustment of the audio sentdown the talkback line.

The THS Rreceives both power and input audio through a female 3 pin XLR from a”Wet” RTS compatible IFB system. Positive 24-30VDC power andinterrupt audio are on Pin 2 and non-interrupt audio is on Pin 3. Pin 1 ispower ground and audio shield. The headphone section of the THS R has twoinputs. Each input has a volume control and dip switches to send the signal tothe left and/or right headphone earpieces. When an input is assigned to bothears, level adjustments affect both left and right ears equally. Both 3.5mm and” TRS jacks are provided for hookup flexibility. Headphones with impedancesranging from 30 to 150 Ohms can be driven to full volume. 600 Ohm headphonescan be used with a slight reduction in volume due to “Wet” IFBcurrent limitations.

Transformerisolation is provided for both IFB inputs and the talkback output. The highquality audio transformers provide signal and power isolation and ground loopreduction for both the interrupt and non-interrupt inputs as well as linebalancing for the talkback output.

The THS Rcan also be locally powered. A rear panel switch selects “Wet” IFB orexternal power supplied by a 12 VAC power adapter, model PS12AC1A, includedwith the unit. Typical current consumption from the IFB line is 85mA. Maximumdraw is 110mA.

Key Features

• RTScompatible 3 pin XLR input configured for “Wet” IFB (24-30VDC)
• Input Assignswitches route inputs to either or both ears
• Individualvolume controls for interrupt and non-interrupt inputs
• Transformerisolation on both inputs and talkback out
• Passive MicOut for on-air reliability
• Mic outputswitching is completely silent
• Active linelevel Talkback Out with level adjust
• Cough andTalkback switches for control
• 1/4” TRS or3.5mm headphone jacks
• PS12AC1Apower adapter included for external power