> ## 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.

# Equalizer

> Use the parametric EQ in Saranna, and modify the factory presets.

> [!WARNING]
>
> Equalizing is an advanced topic, and learning how to do that is beyond the scope of this user manual. Feel free to reach out to us if you have additional questions about this. Please do not randomly change things in the equalizer if you don't know how to do it. Worst case, you may damage your speaker.

## Install the software

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

After installing the software, locate the Hypex filter designer (HFD) and launch the software. Connect your speakers to a computer via the included USB cable, and the software will automatically detect your speaker.

## Basic instructions for the parametric EQ

> [!NOTE]
>
> The EQ is configured independently for each preset. Each speaker must be EQed individually.

The EQ should be used primarily to reduce peaks caused by room modes in order to achieve a smoother in-room response, not add boost. EQ is most effective below \~500 Hz, but can also be used for broad adjustments higher up, for instance reducing treble in a very reflective room.

**1. Open the EQ**

With the HFD software active and the speaker connected, click the **EQ** button in the HFD interface.

**2. Add a filter**

Click one of the nine circles in the graph or one of the EQ buttons below the graph, and change the desired parameters.

**3. Apply the changes**

Make sure **EQ Enabled** is selected, and then click the **Upload to DSP** button.

### Filter parameters

| Parameter | What it does |
| - | - |
| Center frequency | The frequency you want to boost or cut. |
| Q factor | A low number means a wider frequency range is affected, a higher number means a more narrow frequency range is affected. We recommend using low Q (below 0.5-1) for most natural sound. |
| Gain | Add a positive number to increase (boost) volume in the selected frequency range, and a negative number to reduce (cut) volume. We do not recommend exceeding +3/-6 dB. |

> [!TIP]
>
> Trying to use all nine filters to perfectly flatten the response isn't always a good idea. Two or three well placed low Q filters may sound best even though the result isn't perfectly flat.

> [!WARNING]
>
> We strongly advise against adding boost beyond 3 dB, especially below 100 Hz.

## Modifying the factory presets

| Preset | Filter | Center frequency | Q | Gain |
| - | - | - | - | - |
| Preset 2 | Shelf filter loaded to PEQ 9 | 125 Hz | 0.707 | +1.5 dB |
| Preset 3 | Shelf filter loaded to PEQ 9 | 125 Hz | 0.707 | +3 dB |

### If the speakers are too bass heavy

If you feel the speakers are too bass heavy, you probably have some room modes that should ideally be addressed with individual EQ (see above). Feel free to reach out to get help with this.

Alternatively, you can try to adjust preset 2 or 3 to reduce bass instead of increasing. -2 dB can be a good starting point.

If reducing the bass also leaves you with a midbass that is too lean, you can try to reduce the center frequency to for instance 80 or 60 Hz.

### If the speakers lack bass

If you instead feel the speakers still lack bass even in preset 3, try to move the speakers closer to the wall, or try increasing the gain further to for instance +3 or +4 dB.

If you require a fuller midbass, you can try increasing the center frequency to 200 Hz or 300 Hz.


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