Etymotic ER-4P Review
By
March 9th, 2004
Summary
Higher sensitivity for use with portable devices 9dB more output with a 1mV input than the ER-4S Slightly modified frequency response. Due to customer requests we increased the low frequency sensitivity of the ER-4P relative to the ER-4S Features include: 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 The ER-4MicroPro¿ earphone system includes: 5' cord with 3.5 mm stereo phone plug 1/4" stereo phone adapter plug 6 white flanged eartips 10 black (13mm) foam eartips Filter-changing tool with 4 filters Instruction booklet Shirt clip Carrying pouch Storage box.
Specs
- 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
- Weight: Less than 1 oz. (28 grams)
- Cord Supplied: 5 feet with 3.5mm (1/8 inch) stereo phone plug
- Transducer Type: Dynamic