Bose ToneMatch T4s Mixer Connections

How to connect Bose T4s mixer with the L1 Pro8, Pro16 or Pro32

This guide provides a comprehensive overview of establishing connections between the Bose T4S ToneMatch mixer and L1 Pro systems for various configurations. It outlines the procedures for achieving both focused mono setups for single L1 Pro systems and captivating stereo experiences for dual L1 Pro system deployments.

Mono Setup for a Single L1 Pro System

  1. Source connections: Connect your microphones, instruments, or DJ controller directly to the designated input channels on the T4S mixer. Microphones ideally use XLR, everything else should be 1/4″ or 6.3mm TRS jacks.  Mute the inputs or turn the gains down.

  2. ToneMatch Cable Connection: Use the included ToneMatch cable to establish a digital link between the ToneMatch port labelled “L” on your T4S mixer and the ToneMatch port on your L1 Pro system. This high-quality cable guarantees lossless audio transmission for unparalleled sound quality, and it also powers the Tonematch T4s meaning no additional power supply is required for the mixer.

  3. Mono Channel Panning: For mono audio, adjust the pan knob for each channel on the T4S mixer fully to the left. This configuration directs all audio information to the left channel, the only channel connected to an actual speaker and ensures nothing is missed or lost.


Dual-Mono Setup for Two L1 Pro Systems

  1. Mic/Instrument/DJ: As with the single/mono L1 Pro setup, connect your microphones, instruments or DJ controller to the various input channels available on your T4S mixer, and of course turn the gains down or mute the inputs.  Microphones ideally use XLR, everything else should be 1/4″ or 6.3mm TRS jacks.

  2. Digital Audio Link: Use the ToneMatch cable for a digital audio connection between the ToneMatch “L” port on your T4S mixer and the first L1 Pro system. This cable maintains a digital audio connection and also powers the T4s mixer, meaning no additional power supply is required.

  3. Mono Channel Panning: As with the single L1 Pro setup, pan all channels on your T4S mixer completely to the left. This ensures a dedicated mono signal is delivered to both L1 Pro systems, resulting in an identical mono sound across both speakers.

  4. Daisy Chain L1 Pro to L1 Pro: Connect an XLR cable between the LINE OUT port on the first L1 Pro system to any available input on the second L1 Pro system. This cable effectively carries the mono audio signal from the first system to the second speaker.

Important Note: When connecting to channels 1 or 2 on the second L1 Pro system, ensure the ToneMatch selector for that specific channel is deactivated.


Stereo Setup for Two L1 Pro Systems

  1. Mic/Instrument/DJ: Similar to the single L1 Pro setup, connect your microphones, instruments or DJ controller to the various input channels available on your T4S mixer.  As always, mute the inputs.
  2. Left Channel Routing: Connect a ToneMatch cable between the ToneMatch L (left) port on your T4S mixer and ToneMatch port on the first L1 Pro system.  This also powers the T4s so no additional power supply is required for the mixer.

  3. Right Channel Routing: Connect an additional ToneMatch cable to the ToneMatch R (right) port on your T4S mixer to the ToneMatch port of your second L1 Pro system.


Important note for DJ controllers: Many DJs using the L1 Pro and a ToneMatch mixer instinctively connect their DJ controller outputs to channels 5 and 6 on the T4s.  Note that The ToneMatch offers little or no EQ or effects for channels 5 and 6 and are essentially just “pass-through” inputs.  To take full advantage of the ToneMatch built in presets and EQs, consider running a mono signal into channel 1 through 4 (any channel) or for stereo, use ch1 and 2, or 3 and 4 together.