Ultrasone Saphire professional In-Ear-Headphones, made of superior metal die casting quality, 2-way hybrid technology: high performance BA-Driver + electrostatic dual tweeter, frequency response: 10 - 50000 Hz, 25 Ohms...

Shure KSE 1200, electrostatic InEar-System with Single-Microdriver earphone and DAC-preamp, highest sound qualitiy, ultrathin membrane, Kevlar reinforced cable for a long lifetime, 10 - 50.000 Hz, 113 dB SPL max, weight...

"InEar ProPhile-8, universal fit 4-way InEar headphone with 8 driver, 2 switches to adjust the sound, ergonomic housing fits for almost every ear, nice and powerful Sound, noise isolation about 26 dB, 120 dB SPL max, 34..."