[Elecraft] K3 - Splitting main/sub audio to 2 headphones

[Joe Subich, W4TV]

On 2014-06-01 2:11 PM, Jim Brown wrote:
 > I agree with Don that it's perfectly fine to parallel two sets of
 > headphones on the output of a K3. The load impedance of most modern
 > headphones is much greater than 16 ohms.

You can't guarantee that with any two random headphones - my shack has
headphones anywhere from 8 Ohms to 200 Ohms.  Paralleling headphones
of with differing impedance and sensitivity will result in one operator
getting too much or too little audio and may require gain high enough
to result in excess distortion or dissipation.

73,

    ... Joe, W4TV


On 2014-06-01 2:11 PM, Jim Brown wrote:
> On 6/1/2014 7:45 AM, Joe Subich, W4TV wrote:
>>> You should have no problems with paralleling 2 headphones on the
>>> audio output of the K3, with no need for any external mixer.
>>
>> I would not risk it.  The K3 headphone amplifier is only rated for 105
>> mW at 16 Ohms.
>
> I agree with Don that it's perfectly fine to parallel two sets of
> headphones on the output of a K3. The load impedance of most modern
> headphones is much greater than 16 ohms.
>
> 73, Jim K9YC
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