QFRSolo/c Headset

28.7dB NRR Passive Attenuation

• Cell/Satellite Phone Interface
• Closed Cell Foam Padded Ear Seals
• Lightweight: Under 12 oz
• Dual Volume Controls, Stereo or Mono switchable
• Adjustable Gain Pre-amp Allowing for Field 'Balancing' of Mic Sensitivities
• Reversible Boom Allowing for Left or Right Side Operation
• 3-Year Warranty
• Padded Headset Bag and Mic Wind Screen

General Data

Connectors: .250" Stereo Headphone Plug .206" Stereo Microphone Plug
Audio Controls: Small In-Line with Left and Right Ear Level Control, Stereo/Mono Switch
Weight: 11.8 oz

Headphone Data

Transducer: Dynamic
Frequency Response: 17-24,000 Hz
Nominal Impedance: 300 ohms Stereo 150 ohms Mono

Microphone Data

Transducer Principle: Noise Cancelling Electret
Frequency Response: 200-5000 Hz
Maximum SPL: 114 dB
Terminating Impedance: 470 ohms
Operating Voltage: 8-16 V DC Appx 5-12mA

Attenuation Data for QFR Solo NRR 28.7

Freq.	125	250	500	1000	2000	4000	8000
Mean Att.	18.67	24.17	36.30	38.27	38.87	43.13	42.70
Stand Dev	1.63	2.04	2.87	3.80	1.74	2.94	3.22
APV (dB)	15.41	20.10	30.57	30.67	35.39	36.86	35.35