T4S to Two S1 Pro Systems (Stereo)

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Here's a quick overview of how you can connect a T4S to an S1 Pro

  • Leave the T4S and S1 Pro turned off until you have things connected
  • Connect the T4S power supply to the T4S (T4S power supply sold separately)
  • Connect the T4S Right Output to the Right S1 Pro System channel 1 or 2
  • Connect the T4S Left Output to the Left S1 Pro System channel 1 or 2

T4S Analog to S1 Pro x 2 stereo.png




  • Use 1/4 inch (6.35 mm) Tip-Ring-Sleeve cables for best results

See the source image

On the S1 Pro System, for each channel you are connecting to the mixer use these settings while you are setting up.

S1 Pro Settings for mixer.jpg

  • Reverb OFF
  • Bass at 12:00 o'clock
  • Treble at 12:00 o'clock
  • ToneMatch switch OFF

You can adjust the Reverb, Bass, and Treble after you get your basic sound working.

Gain Staging

Using a Bose device as the source

When connecting a ToneMatch Mixer[1] or an S1 Pro System Line Out to an S1 Pro System channel 1 or channel 2

Set the volume control to 10:00 o'clock with 1/4 inch (6.3 mm) Tip-Ring-Sleeve

The signal strength from a ToneMatch Mixer[1] or an S1 Pro System Line Out is sufficient to achieve the maximum usable volume from the S1 Pro System
Control the overall volume from the ToneMatch Mixer[1] or the first S1 Pro System. If you use an XLR cable, set the volume control to 9:00 o'clock

ToneMatch Mixer to S1 Pro.jpg


Using a third-party source (not a Bose device as the source)

For each channel you are using on the S1 Pro System

  1. Turn the channel volume off
  2. Connect your sound source
  3. Adjust the volume of the source device output to the reference or nominal output level.
    • On analog consoles this may be marked as unity or 0 dB.
    • On digital consoles this may be marked as -18 dBFS[2][3]. The exact value (-18 dBFS to -20 dBFS) may vary depending your location[4].
    • Refer to the manual for the source device for details.
    • If the source device does not have metering or indicators, set the output as high as you can without hearing distortion or seeing red indicator lights.
  4. While playing/singing as loud as you will during your performance, bring up the channel volume until you see solid green on the channel indicator light. Occasional flickers of red are okay. If you see solid red or you hear distortion, turn down the volume.


Turn on the T4S


  1. Set the Rotary Selector to PAN/AUX
  2. Press the CH EDIT button for each channel you are using and pan the input left or right as required


Turn on the S1 Pro
  1. Play some music on the {T4S] and bring up the Master Volume to 12:00 o'clock
  2. Bring up the channel volume on the S1 Pros so you get a solid green light. If you see red or you hear distortion, turn down the channel volume.

Now use the T4S ToneMatch mixer Master Volume to control the overall volume.