20 Db gain

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  • Updated 4 years ago
does the 20db gain work with the XLR input on the 6500?
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Bill -VA3WTB

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Posted 4 years ago

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Jay / NO5J

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Should, Mine does. enable in radio setup/phone tab.
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Tim - W4TME, Customer Experience Manager

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Yes, it works with MIC and XLR but not LINE.
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np2g

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YEP
What happens if you really need 16DB  or 12DB ??? 
Far better to use what your system requires.
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Tim - W4TME, Customer Experience Manager

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The sensitivity of most dynamic mic is in the -55 dB range and whenever you connect a mic without outboard audio processing hardware directly to the FLEX-6000, you will need the +20 dB mic boost (preamp).  With this configuration, the DSP mic gain value (slider) is approximately mid-scale, so there is headroom to accommodate mics that may be a little more sensitive which will require less DSP gain.  

In most radios, this mic preamp also of fixed gain, is enabled all the time and cannot be turned off.  In SmartSDR we provide the flexibility to use the MIC and BAL inputs with outboard audio processing hardware by allowing the user to disable this additional amount of audio input gain because in a properly set outboard audio rack, a significant portion of the audio gain is coming from the mic preamp in the rack and not being provided by the radio for the greatest SNR.
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np2g

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Most mikes are all over the place. And shamefully so some do not read the spec. So if +20. Why not adjustable. To use what. Most. Need not more. ?????
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Bill -VA3WTB

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Than you
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k3Tim

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I realize this seems like "small potatoes" but...  I originally set the 6500 up with mic (Heil PR-40) in the XLR balanced input.  Put a tune pre-amp in line instead to give a warmer sound.  I thought at first cabling would be a hassle but a small XLR jumper cable was all that was needed.  I was using Flex in XLR input mode since I was using the XLR inputs afterall.  That was a big squirrely controlling the gains between the pre-amp and Flex.  The other   Did some reading of the manual and determined the line-input was the way to go.  This would allow the Vu meter on the preamp to display a proper "studio" level.  The manual said TLR input plugs and the thought of cable hassles hit once more.  Luckily the balance jack on the back take both XLR and TLR in common.  Switched the SSR menu item from XLR to balanced and was good to go.  With that the Vox, voice gain settings are in the lower part of the range.  The setup was easy (after reading the manual and taking a short break to think it thru.)   I was very impressed with the Engineering / hardware setup and software.

Best Wishes to All

k3Tim   
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np2g

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Yes your pr 40 needs more output. It's a nice mike. Giving it exactly what it needs makes it sound correct
And it's not small potatoes it's understanding what options you have and making the best of them.
For me a fixed value sometimes is not totally needed. This is why I would suggest that flex make that available gain adjustable .
Too much is just as bad as too little