TM414 Features in Brief

• Two stereo playback outputs with build-in headphone amps and additional balanced outputs for external speaker and headphone amps
• Mixing selector section allows combining playback mixes from aux sends, cue send, stereo master and the control room source
• Any number of TM414 playback/talkback modules can be installed in a console
• Talkback system with build-in microphone and gain control
• additional 'Talkback only' output for talkback speaker in the studio
• large format, illuminated push buttons for talkback
• latching and momentary switches in parallel
• additional headphone output in the module for easy control of the playback mixes in the control room

Talkback
The Talkback section of the TM414 playback/talkback module has a build-in, omni directional electret condensor microphone with an adapted preamplifier. The output of the talkback system is available on the playback sections. In addition, an external, electronically balanced output can be activated by the EXT switch. This output can be used to drive active talkback speakers in the studio or to link the ToolMod console to an intercom system.

In addition, the talkback output can drive the internal talkback bus of the ToolMod Console. If more than one TM414 modules are installed, talkback from one of the modules can be used for all TM414 devices. The configuration is done by jumpers on the modules.

Two large format, illuminated push buttons activate talkback. One the switches is latching, the other one is a momentary version. Both switches operate in parallel.

Mixing Selectors
Each of the two playback sections, STUDIO A and STUDIO B has a mixing source selector with switches for the auxiliaries AUX1 to AUX6, the stereo CUE master, the stereo MIX master, and the control room source signal CTR. By pressing any number of switches at a time, it is possible to combine a playback mix out of different signals. A typical example for using this feature is to set up a playback mix on the stereo cue send for everybody. By adding AUX6 with more snare drum for the bass guitar player in the STUDIO A section while adding AUX5 with a high level bass signal for the drummer in the STUDIO B section, it's quite easy to adapt the basic mix to the needs of the different players.

Since the TM414 playback/talkback module fits into standard channel compartments, any number of playback outputs and different playback mixes are possible.

Talkback to Headphones
A TB level control pot sets the talkback level for each playback output independently. The TB-OFF switch defeats Talkback for the particular output. The talkback signal is mixed to the playback mix that is automatically attenuated by 12 dB.

Playback Output
Each of the two playback sections has a build-in headphone amplifier and an additional electronically balanced output. Both outputs operate in parallel. The internal headphone amps can drive 3 to 4 headphones in parallel with sufficient levels. The headphones are connected in parallel to the outputs, therefore, the headphones on one output should have the same impedance and the same sensivity, since it is not possible to control the levels independently. The balanced, line level outputs can be used for external power amplifiers or active playback speakers in the studio.

Each output sections has a volume control, a Cut switch that mutes the particular output, a DIM control that causes an attenuation of 12 dB and a mono switch, that adds the left and right stereo channel, if it is of advantage to have the playback mix available in mono. DIM can be controlled by the consoles dim bus, if the corresponding jumper on the pcb is installed. The dim bus is driven by the talkback system, which makes possible to add another 12 dB of attenuation to avoid feedback when studio speakers are used.

Additional Headphone Output
An additional headphone output in the module is available on a TRS jack. The OUT-B switch determines if this output is driven from the STUDIO A or the STUDIO B chain. It allows easy control of the playback in the control room, just by using a headphone.