Etymotic ER4 SR/XR Noise-Isolating Earphones (Open Box) add extension cable option we do not recommend this

we do not recommend this

it is extremely faithful to the original work

32 ohms comes standard with BLACK for leader earpads

The pair is available in three different colors Aqua Blue

• Hard Case: protective EVA case with Meze Audio metal logo

Etymotic ER4 SR/XR Noise-Isolating Earphones (Open Box) add extension cable option we do not recommend thisWhich ER4 is right for you? Both ER4 models, the ER4SR and ER4XR, use the same Balanced Armature (BA) drivers. The only difference is the tuning of the lower (bass) frequencies. The ER4SR, being the reference model, is tuned to be as precise and flat as possible. The ER4XR, being the fun model, is tuned with added bass. As you can see from the frequency response graphs below, ER4XR adds 1 2dB to the mid bass frequencies (below 200Hz) and 3 4dB to the