Routes the channel signal directly to the headphones and master meters to monitor individual inputs without affecting the main mix.
Positions the channel's signal within the stereo field or assigns it to specific odd/even sub-groups.
1/4" TRS insert points on all channels and group outputs. Channel Strip Breakdown
Here is what the manual explains that common sense does not:
Aux 1 and 2 are typically pre-fader (for monitors), while Aux 3 and 4 are post-fader (for Reverb/Delay). Soundtracs Topaz 12 4 Manual
For specific parts or deep technical manuals, community forums often point to TheSoundtracsGuy.com , a specialist for these legacy consoles. Key Specifications for the 12-4
: Use the subgroups to blend dry and compressed signals. For example, sending your drum bus to subgroups 1-2 and then to the main mix allows for punchy, parallel processing. The "Miami Vice" Aesthetic
: Note that the "Control Room" outputs will mute when the Talkback mic is engaged to prevent feedback, but the "Studio" outputs will not. Useful Video Resources
Includes master rotary pots for Aux 1, 2, 3, and 4 to control the aggregate output level leaving the console toward external gear. Tape Returns Routes the channel signal directly to the headphones
: Left and Right main outputs via balanced connections.
Known for its "musical" 3-band EQ (High at 12kHz, Mid at 2.5kHz, Low at 80Hz). 2 Aux sends, 2 Stereo FX returns, and Stereo Tape I/O.
Unlocking the British Sound: The Soundtracs Topaz 12-4 Quick Guide If you’ve managed to get your hands on a Soundtracs Topaz 12-4
Switchable between main mix, 2-track return, and group monitor. Channel Strip Breakdown Here is what the manual
Each of the 12 primary channels features an identical vertical layout. Understanding the signal flow from top to bottom is key to operating the console effectively. 1. Input Section
The right side of the console houses the master section. This is the command center where individual signals are summed, processed, and monitored. Subgroups (1-4)
Patch the stereo outputs of the effects unit back into an empty pair of line inputs, or into the on the master section.
The Topaz 12-4 features a "12-4-2" architecture. This means it has 12 input channels, 4 subgroup buses, and 2 main stereo output channels (Left and Right). Input Strip Breakdown
The most important mod is converting the from the consumer –10 dBV standard to the professional +4 dBu standard. This modification is crucial for the Topaz to interface cleanly with modern audio interfaces and outboard gear, which typically operate at the +4 dBu level. The manual includes a diagram for this mod. It involves opening the console, locating specific solder pads (marked "POINT A" and "POINT B" on the PCB), and either cutting a solder bridge (to open the circuit) or adding a solder blob (to close it), depending on the desired result. Many users have successfully performed this modification following the manual's instructions.