As I can see from typing in R&B magazines on the internet, there is a great range of mastheads. This goes from the genre itself "R&B" to "Vibe" and "XXL". From these, I can gather that the typical conventions are related to the music itself, the feeling it gives and how big the magazine is. Looking into it, I can see they are thought about carefully to capture readers and enable to sell with a word that readers will be interested in or made to make the readers get an instant good vibe from the magazine. With this, we will bare in mind mastheads that would attract us but makes people want to read the magazine and not just a random name. If we can we will relate it to R&B but I don't think it is essential.
