All the Features of the ER•3A:

• Approximates TDH-39, -49 and-50 response at the eardrum
• 70+ dB isolation between ears: reduces the need for masking
• Eliminates collapsed ear canal problem
• 30+ dB external noise exclusion
• Calibrated in 2 cc Coupler
• Can be calibrated according to ANSI S3.6-1996

• 20 dB higher maximum output at 6 and 8 kHz than ER•3A
• Easier to calibrate at high frequencies
• No front tubes

System Includes

• Earphones (10 Ohm or 50 Ohm immittance)
• Dual-mono 7 ft. cable assembly
• 50 foam eartips (regular, 13 mm)
• 10 foam eartips (baby, 10 mm)
• 4 foam eartips (jumbo, 17 mm)
• Neckstrap
• Shirt clip