Radiosport RS60CF headset with M350-ADJ mic, audio output too low on Flex6500

  • 1
  • Question
  • Updated 1 year ago
  • Answered
I have the Radiosport RS60CF headset with the M350-ADJ mic & the correct cable for the Flex6500. I enabled the +20db Mic Preamp Bias but the mic aidio output seems very low & even with full mic gain I cannot get anywhere near the yellow or red line section on audio ouyput at normal speech levels. What am I doing wrong or must I just speak louder? I used the same headset (different cable) on my K3 and remember I had to set something in config to increase output for this mic..
Photo of Ray G3XLG

Ray G3XLG

  • 21 Posts
  • 5 Reply Likes

Posted 1 year ago

  • 1
Photo of Ray G3XLG

Ray G3XLG

  • 21 Posts
  • 5 Reply Likes
Official Response

Problem Solved by Dave at Radiosport, thank you!

I feel such an idiot ....! Whilst I had enabled the Bias in the "Settings/Phone CW Tab", I had not clicked on the separate 20db boost button. When I did this there was plenty of audio gain!

 For info I show below Dave's advice:-

"We have recently dropped the -ADJ nomenclature for the M350 Mic (part numbers getting way too long when appended to headsets) and yes all M350 do have adjustable gain, although virtually everyone runs them at full gain.  Be certain that the +20dB Boost (next to the BIAS) is enabled (highlighted Blue just like the BIAS) as I've seen this disabled if the Mic Profile has been saved without it enabled and so each time the radio is started it goes back to the profile setting.  If you have verified this then there is something wrong.  

Please note we have only had one M350 failure in 7 years and that Mic was blown from a static discharge (handling the headset in very dry conditions without discharging one's self before picking up the headset).  That type of failure is complete, the Mic won't work at all.  If yours works but has low output, please have xxxxxxxxxr at xxxx check it out in their workshop.  They will be happy to replace if it is defective."