> ## 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, startup gain and input detection on MANTA 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 speaker**

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

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 speaker 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.

## Gain, and auto on/off vs gain

The startup gain of the MANTA may be adjusted with the **Volume on start** setting. The default value is +9 dB.

Different sources have different output levels, which means the default configuration of your MANTA may not work perfectly.

| If you experience that | Try this |
| - | - |
| The MANTA will not automatically turn on | Decrease the **Volume on start** setting by 3 dB. |
| The MANTA won't turn off | Change the **Signal detection level** from 1 to 2, or increase **Volume on start** by 3 dB. |

> [!NOTE]
>
> If you change the gain (volume on start) on your speakers, you will need to increase or decrease the gain on your subwoofers with the same amount to ensure proper integration. This can be done either through the software or via the gain knob on the back of your subwoofer.

## 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 speaker will mute (green LED blinking).

If you experience any problems with this feature, autodetect can be disabled on the main screen by changing the **Force input** setting to the preferred input.

> [!NOTE]
>
> This setting is defined independently per preset. If you want to force the input to a specific input for all presets, you have to cycle through all three presets via the **Filter preset** setting, and configure **Force input** to your preferred setting on each one.


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