> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sigbergaudio.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Adjusting defaults

> Change auto on/off and input detection on the Sigberg Audio subwoofers using a laptop connected via USB.

You may override or adjust the settings on this page using a laptop connected to the USB port.

## Install the software

**1. Download the software**

The software needed to access these settings can be downloaded from [sigbergaudio.no/manuals](https://www.sigbergaudio.no/manuals). Windows 7 or higher is required.

**2. Launch Hypex filter designer**

After installing the software, locate the Hypex filter designer (HFD) and launch the software.

**3. Connect the subwoofer**

Connect the subwoofer to your computer via the included USB cable. The software will automatically detect your subwoofer.

All settings below are found by clicking the **Device settings** button in the main interface, unless stated otherwise.

## Auto on/off

Auto on/off is enabled by default.

If no input is detected for 120 minutes, the subwoofer will enter power saving mode. It will automatically wake up again when a signal is detected.

Power saving settings and auto on/off sensitivity can be adjusted by changing the **Activate signal detection** parameters under **Device settings**.

Signal detection level 1 is the most sensitive (default), 4 is the least sensitive.

## Autodetect signal source

By default the amplifier will autodetect signal from any of the inputs.

If autodetect is enabled and no input is detected for 15 seconds, the subwoofer will mute (green LED blinking).

Signal autodetect can be disabled on the main screen by changing the **Force input** setting to the active input.

> [!NOTE]
>
> This setting is defined independently per preset.


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