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Signature Plus Mixers FAQ

Frequently Asked Questions


Written by Jazmin Vargas

Updated at September 29th, 2026

Table of Contents

Brand: Models: What’s included in the box? IMPORTANT INFORMATION: How is Phantom Power activated on the mixer? NOTE: Does the unit have a Standby Mode? What is the gain range? NOTE: What us the PAD value? What are the EQ frequency Settings and High-Pass Filter (HPF) frequency? What are the compression parameters for the Signature Plus Mixers? NOTE: What routing options are available? How does the ¨Listen¨ button work? Why does Talkback (T/B) remain enabled? What is the DIM pad value? How many Aux sends are available, and what is Mix to Auxes? What footswitch and FX control features are available on the Signature Plus mixer? Does the Signature Plus Series feature a USB Interface? NOTE What is USB INT? What is the USB audio sample rate? How many channels does USB support? Why is my USB audio intermittently cutting out? How do I route USB inputs and outputs to a DAW Does the Signature Plus Series have built-in effects How do I store FX preset? How do I select FX Group B? Is software included with the Signature Plus Series? What is the Warranty on my product? Additional Information: Signature Plus Video Manual Series Available Documentation for Signature Plus Mixers Product Parts Information and Availability NOTE:

Brand:

  • Soundcraft 

Models:

  • Signature Plus 12
  • Signature Plus 16
  • Signature Plus 22 
  • Signature Plus 32

What’s included in the box?

1x Signature Plus Mixer
1x Power Cable
1x Quick Start Guide
 

IMPORTANT INFORMATION:

For the Signature Plus 12 and Signature Plus 16, the box includes a pair of rack-mounting extensions.

P/N: 5156353-00 / RACK MOUNT,SIGNATURE PLUS 12
P/N: 5156354-00 / RACK MOUNT,SIGNATURE PLUS 16

 

Mixer Overview | Soundcraft Signature Plus Series

 
 

 

How is Phantom Power activated on the mixer?

On the Signature Plus 12, 16, and 22 mixers, Phantom Power is activated simultaneously across all channels.

To enable Phantom Power, use the GLOBAL 48V Phantom toggle button.  When Phantom Power is active, the button will remain pressed in, and a red LED indicator will illuminate to confirm that the setting is enabled.

On the Signature Plus 32, Phantom Power is activated in two groups:

•    48V Phantom 1-10: Engaging this button turns on 48V Phantom Power for input channels 1 to 10.
•    48V Phantom 11-29: Engaging this button turns on 48V Phantom Power for input channels 11 to 29 and the Talkback Ghost mic preamp.  
 

NOTE:

Enabling Phantom Power will not affect compatible instruments or microphone inputs.  
However, always follow the manufacturer's recommendations for any connected equipment before applying phantom power.

 
 
 

 

Does the unit have a Standby Mode?

No.  The Signature Plus Series does not feature a Standby Mode.

 
 

 

What is the gain range?

The gain range is +6 dB to +65 dB.
 

NOTE:

The Signature Plus XLR preamp has a nominal input sensitivity of +4 dBu ≈ 1.228 volts. 

Consumer audio devices, such as cell phones, computers, televisions, and home audio receivers, typically operate at lower signal levels than professional audio equipment.  As a result, these devices may require additional gain when connected to Signature Plus to achieve an appropriate signal level.  

 
 
 

 

What us the PAD value?

The PAD value is -18 dB.

 
 

 

What are the EQ frequency Settings and High-Pass Filter (HPF) frequency?

The Signature Plus Series provides dedicated filtering and EQ controls that allow you to shape the tonal balance of each channel and remove unwanted low-frequency content.

  • High-Pass Filter (HPF): Fixed at 100 Hz.
  • High-Frequency (HF) EQ: Fixed at 12 kHz.
  • Mid-Frequency (MF) EQ: Adjustable from 150 Hz to 3 kHz.
  • Low-Frequency (LF) EQ: Fixed at 60 Hz.
 
 

 

What are the compression parameters for the Signature Plus Mixers?

The Signature Plus Series features dbx OverEasy one-knob compression for convenient dynamic control. 

Compressor Specifications

NOTE:

The ON button engages the compressor.  When the ON button is OFF, the compressor is bypassed. 

 
 
 

 

What routing options are available?

The available routing options are:

  • Mix
  • Group 1–2
  • Group 3–4

For additional information, please visit the following article:
Main Mix & Groups | Soundcraft Signature Plus Series

 
 

 

How does the ¨Listen¨ button work?

The Solo/Listen function isolates the selected channel signal in the headphones without affecting the main mix, unless the signal has been routed differently. 

 
 

 

Why does Talkback (T/B) remain enabled?

If the “Talkback” button is pressed twice rapidly, Talkback remains enabled until the button is pressed again. 

Talkback provides routing for the “Talkback” signal to selected outputs, making communication with performers or other destinations easier during a performance or recording session.

For additional information, please visit the following article:
Talkback Mic Input | Soundcraft Signature Plus Series

 
 

 

What is the DIM pad value?

The DIM function attenuates the monitor signal by -12 dB.

 
 

 

How many Aux sends are available, and what is Mix to Auxes?

The Signature Plus Series provides flexible auxiliary routing for creating monitor mixes and sending audio to other auxiliary destinations.

  • Aux sends: 4
  • Mix to Auxes: Allows the main mix to be conveniently routed to the auxiliary outputs.

For additional information, please visit the following article:
Aux & Monitor Mixes | Soundcraft Signature Plus Series

 
 

 

What footswitch and FX control features are available on the Signature Plus mixer?

The Signature Plus mixer supports Tap Tempo, FX Bypass, and compatible footswitch control through two dedicated TS jack connections.

  • Tap Tempo lets you synchronize the timing of supported effects, such as delays, with your performance.  
    The TAP TEMPO Footswitch can be used to set the tempo by tapping the pedal, with the mixer calculating the tempo based on the time between the last two taps.
     
  • FX Bypass allows the effects processor to be quickly bypassed when needed. 
    The FX MUTE Footswitch can be used to remotely mute the FX return.
     
 
 

 

Does the Signature Plus Series feature a USB Interface?

Yes.  The Signature Plus Series features an integrated 4×4 USB-C audio interface. 

The USB interface allows the mixer to send and receive audio with a compatible computer and DAW. 
 

NOTE

ASIO driver for Windows is provided as part of the Soundcraft Control Panel Application. 

Soundcraft Control Panel (Mac)    Soundcraft Control Panel (Windows)    

 
 
 

 

What is USB INT?

USB INT routes the master signal to the USB channels for recording purposes.

 
 

 

What is the USB audio sample rate?

The USB audio interface operates from 44.1kHz to 192kHz.

 
 

 

How many channels does USB support?

USB supports 4 inputs and 4 outputs, divided into two channel groups:

  • USB Channels 1–2
  • USB Channels 3–4

For additional information, please visit the following article:
USB Inputs & Outputs | Soundcraft Signature Plus Series

 
 

 

Why is my USB audio intermittently cutting out?

A USB-C high-speed data cable is required for reliable audio transmission.  
If the USB connection intermittently cuts out, verify that the cable supports high-speed data and is properly connected.

 
 

 

How do I route USB inputs and outputs to a DAW

  1. Connect the mixer to the computer using a USB-C high-speed data cable, then select the Signature Plus USB audio device in your DAW's audio settings.
     
  2. Configure the desired USB input channels as recording inputs in the DAW and assign the required DAW outputs to the corresponding USB return channels on the mixer.

For multichannel recording, select the appropriate USB channels 1–2 or 3–4 as the DAW's input and output channels. 

 
 

 

Does the Signature Plus Series have built-in effects

Yes.  The mixers include an integrated Lexicon effects processor.

For additional information, please visit the following article:
Lexicon FX Processor | Soundcraft Signature Plus Series

 
 

 

How do I store FX preset?

Select the desired FX using the encoder and adjust the Tempo as required.  Press and hold the “STORE” button to save the settings.

When the effect is recalled, the saved Tempo will also be recalled.

 
 

 

How do I select FX Group B?

Rotate the FX encoder to switch between FX Group A and FX Group B.

 
 

 

Is software included with the Signature Plus Series?

Yes.  Registering the product provides access to a complimentary software bundle. 

The software bundle includes:

  • Ableton Live 12 Lite
  • Lexicon MPX Plug-in
  • Lexicon LXP Plug-in
  • FLUX:: EVO Series Pack Plug-in
  • FLUX:: MiRA Session Metering
 
 

 

What is the Warranty on my product?

Warranty Period is 3 years.

Find contact information for regional support groups or authorized distributors along with warranty information for the following website:
HARMAN Professional Support

 
 

Additional Information:


Signature Plus Video Manual Series

On the following article you can find the full playlist for Signature Plus Mixers Videos:
Signature Plus Video Manual Series - Full Playlist 


Available Documentation for Signature Plus Mixers

Signature Plus Mixers Spec Sheet

Soundcraft Signature Plus 12 Spec Sheet

Soundcraft Signature Plus 16 Spec Sheet

Soundcraft Signature Plus 22 Spec Sheet

Soundcraft Signature Plus 32 Spec Sheet


User Guide and Compliance

Soundcraft Signature Plus (12, 16, 22, 32)- User Guide

UKCA DoC- Soundcraft Signature Plus 12, 16, 22, 32

CE DoC- Soundcraft Signature Plus 12, 16, 22, 32
 

Product Parts Information and Availability

Available Service Bill Of Materials can be found on the following website:
Soundcraft Service Documents

NOTE:

Please reach out to our HPRO Parts Department for spare parts availability and pricing.

Phone number:
844-766-4899 Option 1

Email:
HPROPartsUSA@harman.com

 

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Table of Contents

Brand: Models: What’s included in the box? IMPORTANT INFORMATION: How is Phantom Power activated on the mixer? NOTE: Does the unit have a Standby Mode? What is the gain range? NOTE: What us the PAD value? What are the EQ frequency Settings and High-Pass Filter (HPF) frequency? What are the compression parameters for the Signature Plus Mixers? NOTE: What routing options are available? How does the ¨Listen¨ button work? Why does Talkback (T/B) remain enabled? What is the DIM pad value? How many Aux sends are available, and what is Mix to Auxes? What footswitch and FX control features are available on the Signature Plus mixer? Does the Signature Plus Series feature a USB Interface? NOTE What is USB INT? What is the USB audio sample rate? How many channels does USB support? Why is my USB audio intermittently cutting out? How do I route USB inputs and outputs to a DAW Does the Signature Plus Series have built-in effects How do I store FX preset? How do I select FX Group B? Is software included with the Signature Plus Series? What is the Warranty on my product? Additional Information: Signature Plus Video Manual Series Available Documentation for Signature Plus Mixers Product Parts Information and Availability NOTE:

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