The ER-4 MicroPro™ earphones are the next best thing to live music, with noise isolation far surpassing that of active noise-canceling earphones. The ER•4s require NO batteries, and can be plugged into any audio source. Their external noise exclusion -- 35 dB with 3-flange eartips, 42 dB with foam eartips -- allows you to hear the full dynamic range of recordings without having to play them at unnaturally high and unsafe levels.
Unparalleled sound accuracy
Virtual elimination of external background noise (20-25 dB isolation)
Lightweight and portable (great for traveling)
High-fidelity monitor earphones for real-ear measurements
Frequency response re nominal: 20 Hz to 16 kHz +/- 4 dB; 50 Hz to10 kHz +/- 2 dB
1 kHz sensitivity: 109 dB SPL for .2 Volt Input; 107 dB SPL at 1mW
Impedance: 27 Ohms nominal
Maximum output: 122 dB SPL
Maximum safe continuous input: .75 V RMS
Acoustic polarity: + Electric = + Acoustic
Cord Supplied: 5 feet with 3.5mm (1/8 inch) stereo phone plug
Transducer Type: Dynamic
Unparalleled sound accuracy
Virtual elimination of external background noise (20-25 dB isolation)
Lightweight and portable (great for traveling)
High-fidelity monitor earphones for real-ear measurements
Frequency response re nominal: 20 Hz to 16 kHz +/- 4 dB; 50 Hz to10 kHz +/- 2 dB
1 kHz sensitivity: 109 dB SPL for .2 Volt Input; 107 dB SPL at 1mW
Impedance: 27 Ohms nominal
Maximum output: 122 dB SPL
Maximum safe continuous input: .75 V RMS
Acoustic polarity: + Electric = + Acoustic
Cord Supplied: 5 feet with 3.5mm (1/8 inch) stereo phone plug
Transducer Type: Dynamic ER•4 MicroPro earphones
5 ft. cord with 3.5 mm stereo phone plug
1/4" stereo phone adapter plug
Six 3-flange eartips
10 foam eartips
Filter changing tool
4 replacement filters
Shirt clip
Pouch (not shown)
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| Product Specification |
| Cord: |
1.5m |
| Ear Cushions: |
In Ear |
| Maximum Output: |
122 dB SPL |
| Frequency Response: |
20-16 kHz ±4 dB |
| Impedance: |
27 Ohms |
| Plug: |
3.5mm |
| Noise Isolation: |
35-42 dB |
| Sensitivity: |
102 dB |
| Weight: |
29 grams |