Boombox is used to nudge users towards secondary actions on the page
Boombox is a louder alternative to a Whisperbox. It is more conspicuous and less likely to be overlooked. A good usage example would be to present users with the option of purchasing a certificate.
Boombox has to be placed the end of the page. It has low contrast typography and a dark grey background.
An alternative implementation of the boombox is the "Boombox Banner" which is for a simpler, banner-style layout with an image, single paragraph of text and a call to action (for example a ghost button).
The Boombox Banner has two modifiers:
--intense, which changes the colour scheme to a more eye-catching white on pink, and
--ribbon which sets the image to the correct width when it's an SVG ribbon.