Engineered for professional music lovers. This headphone is the benchmark that all other in-ear headsets are judged upon. The metal housing relays an honesty not heard before with in-ear headphones. The superior accuracy and ultra clear audio reproduction would normally only be associated with reference speakers. The TFTA-2100-2V1S has a frequency range that is wider than any other comparable design of headset on sale today. The tight fitting bud automatically creates noise isolation and extraneous noise is all but eliminated. Full frequency treble, spacious, warm mid range and bass so deep previously unheard of in this type of small design. If however extra deep sub bass is what you are looking for we recommend the TFTA-2100-3V2B. This design is ideal for rock, hip-hop, heavy metal or any other type of music where bass plays an important part in the overall sound.