View this product description in Norwegian.

Class-D amplifier module for installation inside the VIBE8 Mk2, VIBE10 Mk2 & VIBE12 Mk2 speakers
All you need is a screwdriver and 5 minutes of your time to make the transformation, no technical skills required!
High output power: 300Wrms @ 8ohm  ~  500Wrms @ 4ohm
Balanced / unbalanced line input/output (XLR) with volume control.
100Hz low-cut filter, used to cut low frequencies to the speaker cabinet when used in combination with an active subwoofer.
Speakon output for optional passive 8ohm cabinet. (preferable same model)
IEC input mains connector with integrated switch.