The Soul SL300's combination of active noise cancellation and boosted equalization place these headphones in a specific niche, and these headphones are designed with a deliberate bass push meant to simulate an active subwoofer common in music genres like hip-hop, R&B, rock, and pop music. If your main buying concern for headphones is sonic clarity and balanced fidelity, then we don't recommend the SL300s.
If your focus is bass, the lively treble flares and rounded lower frequencies are similar to the Beats by Dre headphones. Whereas the bass on the Monsters feels more staggered and all over the place, we actually prefer the Soul by Ludacris headphones for their controlled sparkle and ample noise isolation.
Still, although the headphones will definitely block outside noise as you walk down the street or listen to music in the office, they also leak a lot of sound, so we don't recommend you crank the volume up on an airplane, a subway, or anywhere else where others may not want to hear your favorite Ludacris beat.
We'll also note that the limited frequency response inhibits the headphone's ability to accurately pinpoint spatial changes in music recordings; in other words, you'll have a hard time placing the location of the instruments in relation to where the microphones were placed in the recording space.
The spatial realism suffers as a result, although that won't be an issue if you're primarily listening to music with artificial instruments like drum machines and synthesizers.
The Soul by Ludacris SL300 headphones are suitable for blocking outside noise and add a colorful sonic boost to bass-heavy genres like hip-hop, house, and rock music. We recommend them over competing models like the Monster Beats by Dr. Dre headphones thanks to their more controlled low-end that doesn't sacrifice ambient noise isolation.