ETYMOTIC ER4SR STUDIO REFERENCE HEADPHONES

From Etymotic Research the ER4SR Studio Reference balanced armature in ear earphones.  Always accurate the ER4SR's are remarkable. Fit is critical when using any in ear headphone and Etymotic Research goes out of their way to make sure to supply you with many sizes and types of ear tips so you are sure to get an accurate seal. New and sealed,  there is some shelf wear on the box as it is coming from our retail location.   From Etymotic In a Class by Itself Etymotic invented noise-isolating, in-ear earphones. The ER4 MicroPro series earphones were the first earphones commercialized using balanced armature  technology and are recognized as the world leader in response accuracy, to which all other earphones are compared. After more than 20 years, these reference-quality earphones are still the choice of serious sound engineers, audiophiles and musicians. Backed by decades of research and development for the ear World leader in sound reproduction Unsurpassed frequency response accuracy an