Run-D.M.C. was the first rap act to produce cohesive, fully realized albums, and LL Cool J was the first to follow in their footsteps.

LL was a mere 17 years old when he recorded his classic debut album Radio, a brash, exuberant celebration of booming beats and B-boy attitude that launched not only the longest career in hip-hop, but also Rick Rubin's seminal Def Jam label.

Rubin's back-cover credit ("Reduced by Rick Rubin") is an entirely apt description of his bare-bones production style.

Radio is just as stripped-down and boisterously aggressive as any Run-D.M.C. album, sometimes even more so; the instrumentation is basically just a cranked-up beatbox, punctuated by DJ scratching.

There are occasional brief samples, but few do anything more than emphasize a downbeat.

The result is rap at its most skeletal, with a hard-hitting, street-level aggression that perfectly matches LL's cocksure teenage energy.

Even the two ballads barely sound like ballads, since they're driven by the same slamming beats.

Though they might sound a little squared-off to modern ears, LL's deft lyrics set new standards for MCs at the time; his clever disses and outrageous but playful boasts still hold up poetically.

Although even LL himself would go on to more intricate rhyming, it isn't really necessary on such a loud, thumping adrenaline rush of a record.

Radio was both an expansion of rap's artistic possibilities and a commercial success (for its time), helping attract new multiracial audiences to the music.

While it may take a few listens for modern ears to adjust to the minimalist production, the fact that it hews so closely to rap's basic musical foundation means that it still possesses a surprisingly fresh energy, and isn't nearly as dated as many efforts that followed it (including, ironically, some of LL's own).