Etymotic ER-4P

Reference-quality earphones for the audiophile or recording engineer. The next best thing to live music, with noise isolation far surpassing that of active-noise-reduction earphones.

• 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

Supplied Accessories:

• 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

Dimensions:

• Weight: Less than 1 oz. (28 grams)