For the speaker output, the K3 and K3S are optimized for 4 ohms. The SP3 is a 4 ohm speaker.

8 Ohm speakers work fine, but a a slightly lower audio output for the same volume control position.

Eric
/elecraft.com/

On 1/23/2017 9:00 AM, Joe W2KJ wrote:
Howdy Gang:

Checked the KX3 manual but was unable to find the audio output impedance of the 
KX3, i.e., what impedance headphones/speaker should I be using on the rig?

I’m looking to buy a lightweight headset for portable ops and want to know what 
impedance I should be looking for.

Many thanks for any info.

                        73, Joe W2KJ
                        KX3,   KX2



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