Specification Sheet

In-ear: Invented here.

Features

· Reference standard

· Metal bodies with anodized ﬁ nish

· Detachable cables allow for easy replacement

and customization

In the Box

· ER4SR earphones

· Detachable, 5-foot cable

· Foam and 3-ﬂ ange ear tips

· Filter removal tool and ﬁ lters

· Deluxe storage case

· Performance certiﬁ cate

Frequency Response 20 Hz – 16 kHz

Channel Matching Within 1 dB from 100 Hz – 10 kHz

Transducers High-performance,

balanced-armature micro-drivers

Noise Isolation 35 - 42 dB

Impedance 45 Ω

Sensitivity (@ 1 kHz) SPL at 0.1V 98 dB

Maximum Output (SPL) 122 dB

Cable Detachable, 5 ft

Warranty 2 years

CUSTOM•FIT Option ✓

User Replaceable Filters ✓

Speciﬁ cations



130

120

110

100

20 100 1000

Frequency (Hz)

dB (SPL)

10000

ER4SR

ER4SR Frequency Response

PAGE 1
 Features · Reference standard · Metal bodies with anodized finish · Detachable cables allow for easy replacement and customization In the Box · ER4SR earphones · Detachable, 5-foot cable · Foam and 3-flange ear tips · Filter removal tool and filters · Deluxe storage case · Performance certificate Specifications Frequency Response Channel Matching Transducers Noise Isolation Impedance Sensitivity (@ 1 kHz) SPL at 0.
PAGE 2
  Features · Enhanced and extended bass · Metal bodies with anodized finish · Detachable cables allow for easy replacement and customization In the Box · ER4XR earphones · Detachable, 5-foot cable · Foam and 3-flange ear tips · Filter removal tool and filters · Deluxe storage case · Performance certificate Specifications Frequency Response Channel Matching Transducers Noise Isolation Impedance Sensitivity (@ 1 kHz) SPL at 0.