Has anyone used the Bose A20 headset with the Flex. It is available with either Electret or Dynamic mic. You can get both and swap them back and forth. I am not sure what hoops are needed on the connector side to get from the bose the radio.
I have spent a ton on different headsets and not satisfied with any. Heil Pro set like wearing a pair of bricks on your ears. The Radiosport just pinch my head too much. At this point money is no object. I just want the best that will work. I have the best radio why not the best accessory. I can use my old bose QC15 for 8 to hours and I forget that I've even got them on.
Bose spec
https://www.bose.com/content/dam/Bose_DAM/Web/Consumer_Electronics/products/headphones/a20_aviation_...
Technical Information
38 - English
Headphone
Damage could occur to avionics equipment that is
intended for use only with 600 Ohm headsets. If in doubt,
consult the avionics equipment manufacturer.
Impedance
Monaural mode: 160 Ohms ON and OF
Stereo mode: 320 Ohms ON and OFF
Frequency response
15 Hz to 15 kHz
Sensitivity: 92 dB SPL typical, measured at 1 mw,
1 kHz, full volume on a KEMAR ear simulator.
Microphone (Electret)
Bias required: 8 to 16 VDC through 220 to 2200 Ohms.
Sensitivity: Varies depending on bias and AC radio input
impedance. Typical output is 600 mV at 114 dB SPL. To
assure proper modulation of the radio, it is recommended
that an avionics technician adjusts its input to match the
output of the microphone.
Microphone (Dynamic) Impedance: 5 Ohm or 150 Ohm dynamic mic
Sensitivity: Equivalent to M-87/M-101
Maximum ambient noise level 115 dBC SPL for full active noise reduction performance
Power source
Battery-powered: Two (2) AA alkaline
Aircraft-powered: 10 to 32 VDC
Voltage
Battery-powered: Two (2) AA alkaline batteries
Aircraft-powered: 10 to 32 VDC
Battery life
Alkaline battery life: At least 45 hours in typical general
aviation aircraft noise. Duration varies with battery age,
ambient noise levels, temperature, ear cushion seal, and
use of the
Bluetooth
feature.
Current
Operating: 25 mA in typical aircraft noise
Fuse/breaker recommended 1/4 amp, fast-blow fuse (AGC 1/4 amp fuse) or 1/2 amp
circuit breaker
Headset weight
12 ounces
Headset size range
Slider not extended:
8.425" (214mm) H x 6.34" (161mm) W x 3.15" (80mm) D
Slider extended:
10.2" (259mm) H x 6.6" (168mm) W x 3.15" (80mm) D
Control module dimensions 1.5" (38.1mm) H x 1.5" (38.1mm) W x 4.92" (125mm) D
Temperature and Altitude
(Category A)
Operating: 5 to 131°F (-15 to 55°C)
Storage: -67 to 158°F (-55 to 70°C)
Altitude: 15,000 feet maximum pressure altitude for full
cancellation
Bluetooth
wireless technol
Thanks Roger
I have spent a ton on different headsets and not satisfied with any. Heil Pro set like wearing a pair of bricks on your ears. The Radiosport just pinch my head too much. At this point money is no object. I just want the best that will work. I have the best radio why not the best accessory. I can use my old bose QC15 for 8 to hours and I forget that I've even got them on.
Bose spec
https://www.bose.com/content/dam/Bose_DAM/Web/Consumer_Electronics/products/headphones/a20_aviation_...
Technical Information
38 - English
Headphone
Damage could occur to avionics equipment that is
intended for use only with 600 Ohm headsets. If in doubt,
consult the avionics equipment manufacturer.
Impedance
Monaural mode: 160 Ohms ON and OF
Stereo mode: 320 Ohms ON and OFF
Frequency response
15 Hz to 15 kHz
Sensitivity: 92 dB SPL typical, measured at 1 mw,
1 kHz, full volume on a KEMAR ear simulator.
Microphone (Electret)
Bias required: 8 to 16 VDC through 220 to 2200 Ohms.
Sensitivity: Varies depending on bias and AC radio input
impedance. Typical output is 600 mV at 114 dB SPL. To
assure proper modulation of the radio, it is recommended
that an avionics technician adjusts its input to match the
output of the microphone.
Microphone (Dynamic) Impedance: 5 Ohm or 150 Ohm dynamic mic
Sensitivity: Equivalent to M-87/M-101
Maximum ambient noise level 115 dBC SPL for full active noise reduction performance
Power source
Battery-powered: Two (2) AA alkaline
Aircraft-powered: 10 to 32 VDC
Voltage
Battery-powered: Two (2) AA alkaline batteries
Aircraft-powered: 10 to 32 VDC
Battery life
Alkaline battery life: At least 45 hours in typical general
aviation aircraft noise. Duration varies with battery age,
ambient noise levels, temperature, ear cushion seal, and
use of the
Bluetooth
feature.
Current
Operating: 25 mA in typical aircraft noise
Fuse/breaker recommended 1/4 amp, fast-blow fuse (AGC 1/4 amp fuse) or 1/2 amp
circuit breaker
Headset weight
12 ounces
Headset size range
Slider not extended:
8.425" (214mm) H x 6.34" (161mm) W x 3.15" (80mm) D
Slider extended:
10.2" (259mm) H x 6.6" (168mm) W x 3.15" (80mm) D
Control module dimensions 1.5" (38.1mm) H x 1.5" (38.1mm) W x 4.92" (125mm) D
Temperature and Altitude
(Category A)
Operating: 5 to 131°F (-15 to 55°C)
Storage: -67 to 158°F (-55 to 70°C)
Altitude: 15,000 feet maximum pressure altitude for full
cancellation
Bluetooth
wireless technol
Thanks Roger
Posted 3 years ago
Another good Bose option is QC25 (or older QC15) with added ModMic 4.0, http://www.modmic.com/collections/modmic/products/modmic-muteless
I have used the A20 series for work. While they are a good headset, they are not as comfortable as the QC series. The modmic is the same mic as found on the A20.
How do you attach the ModMic 4 to the QC25
roger
roger
For your qc series, the stereo cable will unplug at the headset. You simply plug the mic module into that same port. It serves a twofold purpose now. Support for the mic module as well as normal audio in from the stereo cable attached to the mic module. There will also be mic cable attached to the module as well.
(Edited)
I use the Bose X Aviation Headset. I have several for use in airplanes and helicopters so it was a natural to build an interface for use with my ham rigs.
Reg
Reg
I dont see any easy way to attach the boom to the head set the electrical connection is straight forward.
roger
roger
Reg,
I see you can get it with all kinds of connections.
standard dual pin
standard 5 pin xlr
U174
6 pin lemo
Would one be easier to interface than another? Are you using dynamic or Electret
roger
I see you can get it with all kinds of connections.
standard dual pin
standard 5 pin xlr
U174
6 pin lemo
Would one be easier to interface than another? Are you using dynamic or Electret
roger
I thought Bose provided an accessory for this but am not certain now. You would need this http://www.headsetbuddy.com/clearmic-noise-canceling-microphone-for-bose-qc15-headphones/ and yes it is straight forward. A ham in South Africa wrote a positive review for this product but I would not be so sure. I am almost certain some co workers have adapted their QC with a bose mic. Perhaps the product has been discontinued to boost A20 sales.
I do not use that accessory. Just the QC headphones.
