The rule for a balanced sound is that the product of the lowest and highest 
frequency should be between 450,000 and 500,000. So for a 2.7 KHz cutoff that 
means a low cut of 166 to 185 Hertz, or rounding that could be 200 Hertz. 

Sent from my iPad

> On Dec 25, 2018, at 8:03 AM, Michael Blake via Elecraft 
> <elecraft@mailman.qth.net> wrote:
> 
> When using the stock K3s 2.7 KHz. roofing filter and all TX EQ settings are 
> zero (0) what is the normal TX audio rolloff below 300Hz.?
> 
> Michael Blake
> k9...@mac.com <mailto:k9...@icloud.com>
> 
> 
> 
> 
> 
> 
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