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The gain / volume knob on Sigberg Audio subwoofers can be adjusted from -12 to +12 dB. The default (0 dB) is found with the volume pointing straight up (12 o’clock).
The Sigberg Audio MANTA monitors are extremely powerful. To keep up, we strongly recommend at least dual subwoofers. This will also give you a smoother bass response.

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Scenario 1: Sigberg Audio subwoofer without external crossover

1

Select preset 2 on the subwoofer

Set your Sigberg Audio subwoofer(s) to preset 2 using the small preset button on the subwoofer amplifier panel.
2

Set the starting gain

If you connect one or more subwoofers via a preamp and its pre-out or sub-out terminals, you will have to experiment to find the right gain level. Output levels from preamps vary a great deal. Start with the gain at 0 dB.If you are connecting dual subs via XLR through from the MANTA, suggested starting gain is +4-6 dB.
3

Listen and adjust

Listen to some of your favorite music. Adjust up or down as necessary until the sound is full but balanced. The subwoofer should sound like a natural extension of your speakers. If you can clearly hear the subwoofer, try turning the level down slightly.

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Scenario 2: Sigberg Audio subwoofer using an external crossover (AVR, processor or similar)

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Using the built-in crossover

The MANTA is designed to integrate perfectly with any Sigberg Audio subwoofers (set your Sigberg Audio subwoofer(s) to preset 2). If you want to use the built-in crossover, you can still do that if you have an AVR or processor. You will need to disable the internal lowpass/highpass feature of your AVR. Set your speakers to Large in the AVR setup, and set the subwoofer to LFE+Main. Please refer to your AVR manual for details on how to do this.

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Using the external crossover

If you want to use an external crossover for ease of configuration or to test alternative crossover points, set your Sigberg Audio subwoofers to preset 1. A minimum crossover setting of 80 Hz is recommended. If you have Sigberg Audio subwoofer(s) or other high quality subwoofers placed at the front wall, anything between 80 Hz and 160 Hz may work well.

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Integrating Manta with a subwoofer of a different brand

Set the crossover of your subwoofer to 100 Hz, and adjust the subwoofer gain until the sound is full. If you can clearly hear the subwoofer dominating, dial back the subwoofer volume until the sound is balanced. If you have trouble getting a good integration, try adjusting the crossover up or down slightly (anywhere between 80-120 Hz may be appropriate, depending on your subwoofer and your room).
The Manta is capable of extreme SPL, so you will need to match it with a high quality and high capacity subwoofer, preferably two.

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Troubleshooting

If you are unable to match up the gain between the speakers and the subwoofers, it is possible to adjust the gain level of the speakers by connecting with the included USB cable and a laptop (Windows only). See the section about gain in Adjusting defaults. If you are still having trouble, do not hesitate to contact us at support@sigbergaudio.no.