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

[Bill Frantz]

On 6/1/14 at 7:45 AM, lists at subich.com (Joe Subich, W4TV) wrote:

>On 2014-06-01 1:02 AM, Don Wilhelm 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.  Both power dissipation (heat) and distortion
>rise significantly as the load impedance drops and the output power
>increase.

I had this problem when installing a FTM-10 in my Mazda Miata. I 
placed the speakers in series so as not to overload the audio 
amplifiers. The output level is somewhat marginal when traveling 
at freeway speeds with the top down, but so is conversation with 
a passenger.

73, Bill AE6JV

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