Etymotic Research ER4SR Balanced-Armature In-Ear Earphones

Etymotic Research—inventor of noise-isolating in-ear earphones—presents the next generation of Etymotic's long-revered flagship earphone, the ER4SR (Studio Reference), part of the ER4® reference earphone series. Developed for auditory research and hearing testing, they use balanced–armature receivers, establishing them as the gold standard for high-definition, in-ear earphones, and were the first high-fidelity, noise isolating, in-ear earphones to offer this technology in a consumer platform, so are recognized as the world leader for signal response accuracy by which all other earphones are measured. Made for those who demand nothing less than the highest fidelity, these are reference-standard high-fidelity earphones. They deliver increased accuracy with greater sound output, or sensitivity, and like their predecessor, their channels are matched within an industry-leading 1 dB across frequencies from 100 Hz to 10 kHz. They also incorporate significant cosmetic and functional improvements, from the sleek, anodized, and laser-etched aluminum body, to the reinforced and user-replaceable detachable cable. A total must-have for discerning engineers, audiophiles, and consumers who want the most accurate in-ear earphone available.

Etymotic Research Inc ER4SR Includes:

• ER4SR earphones
• Detachable, 5ft cord with 3.5mm gold-plated stereo plug
• ¼" stereo phone adapter
• Assortment of eartips
• Filter removal tool and replacement filters
• Shirt clip
• Zippered storage case
• Performance certificate

Etymotic Research Inc ER4SR Features:

• Reference standard
• Unsurpassed frequency response accuracy and sound quality — 92%+ response accuracy from 20 Hz – 16 kHz
• The only earphones with balanced-armature, precision-matched, custom-tuned drivers
• Highest output sensitivity in its class
• Professional quality and reliability
• Metal bodies with anodized finish
• Detachable cables allow for easy replacement and customization
• An assortment of noise-isolating eartip options to ensure proper seal and comfort
• CUSTOM•FIT option available (contact your Sales Pro for more details)
• First earphones to completely seal the ear
• 98% (35 dB - 42 dB) noise isolation —highest of any earphones or headsets on the market today
• Reduction of outside noise reduces the risk of listening at unsafe levels
• 2-year replacement warranty
• User-replaceable filters protect the balanced-armature drivers from ear wax

Etymotic Research Inc ER4SR Specifications:

• Frequency Response: 20 Hz - 16 kHz
• Transducers: High performance, balanced-armature micro-drivers
• Noise Isolation: 35 - 42 dB
• Impedance (@1kHz): 45 Ohms)
• Sensitivity (@1 kHz) SPL at 0.1v: 98 dB
• Maximum Output (SPL): 122 dB
• Cable: 5ft, detachable
• User Replaceable ACCU-Filters: Yes
• Warranty: 2 Years
• CUSTOM•FIT Option: Available (see note below)

NOTE:

An industry exclusive channel-matching compliance graph signed by the Etymotic engineer who precision-matched and custom-tuned the balanced-armature drivers is included with every pair of ER•4 earphones.

Etymotic offers a cost-effective CUSTOM•FIT solution to make your favorite earphones the best they can be with superb comfort, secure fit, and consistent noise isolation. It requires a brief registration process and a visit with an authorized audiologist to have ear impressions made. Please contact your Sales Pro for more information on this option.

Due to the personal nature of its usage, this product is non-returnable. Please contact your Sales Pro if you need assistance when choosing.