Etymotic Research ER4SR Studio Reference In-Ear Monitors

Etymotic Research, Inc

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ER4SR Studio Reference
The World's Most Accurate Earphones Just Got Better!
Over 30 years ago, Etymotic invented noise-isolating, in-ear earphones. Etymotic's original design, developed for auditory research and hearing testing, used balanced-armature receivers and established these speakers as the gold standard for high-definition, in-ear earphones.

- Detachable 5 foot cable
- High performance balanced-armature drivers
- Sleek driver bodies with anodized finish
- Braided cables for reduced microphonic effect

Why Etymotic?
Etymotic designs products to measure, improve and protect hearing, and enhance the listening experience of music lovers everywhere. Audio engineers, musicians and audiologists at Etymotic have generated over 100 patents issued and pending.

Why ER4SR Studio Reference?
ER4SR is Etymotic's new reference standard hi-fidelity earphone for those who demand nothing less than the highest fidelity. The next generation of our long-revered flagship earphone, the ER4S, the ER4SR delivers increased accuracy with greater sensitivity.

Like its predecessor, the ER4SR channels are precision matched within an industry-leading 1dB across frequencies from 100Hz to 10kHz.

The new ER4SR incorporates significant cosmetic and functional improvements, from a sleek, anodized and laser-etched aluminum body to the reinforced, user-replaceable detachable cable. The ER4SR is a must have for discerning engineers, audiophiles, and consumers wanting the most accurate in-ear earphone available.

- Frequency response 20Hz-16kHz
- Channel matched within 1 dB from 100Hz to 10kHz
- 35-42 dB noise isolation
- Impedance 45 ohms
- Sensitivity: 98 dB SPL at 1kHz, 0.1V drive level
- 122 dB maximum output
- Assembled and precision matched in the United States

User Detachable Cables
To detach the cables, pull the cable connector away from the earphone body. Pull straight out-Do Not Twist.

To attach the cables, align the key tab on the cable connector with the notch in the body of the earphone. Press together until it snaps in place.

Changing the Filters
Etymotic earphones have special filters that smooth the frequency response and prevent earwax from entering the earphones. The filters are located at the end of the earphone and are visible when the eartip is removed. When a filter becomes clogged it should be replaced. Filters should be changed when output decreases or sound quality declines.

In The Box
- ER4SR Studio Reference earphones.
- Assorted eartips and 1/4" stereo phone adapter.
- Filter removal tool and replacement filters.
- Shirt Clip and Carrying Case.
- Performance Certificate.


Shipping is always free within the Continental U.S. on any product ordered. We also offer free Expedited shipping on most items $99 and over that are not oversize freight since this service is simply not available: select the option that best meets your needs, transit typically takes 2-3 business days* (if you choose an option not available we will automatically ship the next available as free standard). While most orders ship UPS ground, we use a variety of carriers, thus your package may be delivered via FedEx, UPS, USPS, ENSENDIA, LASERSHIP, ONTRAC, BLUE_PACKAGE or PRESTIGE but always fully insured. Shipping cost and options are shown during checkout. In Stock items should arrive in 1-7 business days, depending on your location and method of shipment. For more details on Shipping.

EASY RETURNS maintains a full, money-back guarantee (excluding any shipping charges) on items returned within 30 days of purchase, if for any reasons you are not fully satisfied.
You may return a defective product for refund or exchange.
All returns require authorization and original packaging otherwise we reserve the right to charge a restocking fee.
Defective or non-defective returns are processed differently. Items do not necessarily go back to the location from which they shipped.
Shipping and handling charges are not refundable.
Returned items that are lost or damaged during transit is solely the shipper's responsibility (which is YOU, when you return an item to us). It is important to send us and save the tracking information.
After receiving the item you must contact us within 30 days from the date of product receipt with the reason for the return and secure a Return authorization number (RA #) and return details.
For more details on Returns.

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