Anyone who thought that the and 11 could not be topped in terms of sound quality must not have reckoned with the developers at Ultimate Ears. The four-way technology of the and 18, which was realized with a total of six drivers, gives this high-end system an even better mid and treble resolution and an extended frequency spectrum in the treble range.

• Driver configuration: four-way technology: 2 x bass drivers, 2 x mid-range drivers, 1 mid/high driver, 1 high-frequency driver
• Frequency response: 20Hz - 18 kHz
• Input sensitivity: 115.6 dB/Spl at 1mW @ 1kHz
• External noise attenuation: pro version approx. -26dB, ambient version -12dB or -26dB (with sealed ambience holes)
• Impedance: 21 Ohm @ 1kHz
  
• Connection cable: interchangeable, 1.2m or 1.6m long transparent, beige or black
  
• Connector plug: 1/8' (3.5mm) gold-plated stereo jack
  

Note on production

For the professional in-ear earphones from Ultimate Ears, an ear impression is required that fills the concha. The full-shell silicone impressions of the ears are 100% customized to the buyer and must include the full helix, crus helicis, tragus and antitragus.

Please refer to the manual icon above, which will redirect you to the Ultimate Ears earpiece order form. For orders of custom-made products, please send us the completed order form together with the ear impressions. The delivery time is approx. 3 - 4 weeks after receipt of the ear impression.

Please note that no 30-day return guarantee can be granted for custom-made products matching § 6 para. 1 b) of our General Terms and Conditions.