SPL Marc One - Monitor And Recording ControllerMarc One: The Monitor And Recording Controller with innovative features and a 32 bit AD DA converter. A monitor controller with which you can also record. And both in impressive sound quality. For us the sound is always in the foreground. When it sounds good, we like to listen. To get such a sound, you need experience and technical finesse. SPL has incorporated both into the Series One. Speakers and Subwoofer You can listen to your production via two