“Stereo hearts” can be considered as a piece of poetry
because song lyrics can be considered as modern poetry. Its structure is
similar to that of a poetry and it uses poetic techniques, too.
The first poetic technique used is metaphor. “My heart’s a
stereo” is a metaphorical statement where the writer has likened his heart to a
stereo which is a completely different thing.
Another poetic technique used is hyperbole. “50 pound boom
box” is an exaggeration because there is no such boom box as heavy as that
weight.
Another poetic techniques is rhyme. “Make me your radio. And turn me up when you feel low” uses rhyme in the ends of its lines.
