ELECRAFT K4 - Page 17

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SPKRS
Left and/or right speaker audio (nominally 4 to 16 ohms). 1 or 2 non-
powered speakers such as the Elecraft SP3 or SP4 may be connected
to this jack. Powered speakers may also be used, though attenuation
may be needed between the speaker jack and the external speakers to
prevent overdrive.
Plugging in external speaker(s) disconnects the internal speaker.
CAUTION: To avoid possible damage to the second speaker channel,
always use a stereo plug, even when connecting only a single speaker.
If only one external speaker is connected, use the left channel output
(tip), and set MENU:Speakers to 1. As with the internal speaker, a single
external speaker will mix main and sub receiver audio.
If two speakers are connected, set MENU:Speakers to 2. Audio is then
routed as follows:
• If the sub RX is turned ON, the left speaker output supplies main-RX
audio, and the right speaker output supplies sub-RX audio. For balance
control, see RF Gain, Squelch, and Main/Sub Balance. For main/sub
RX audio mix controls, see the RX Audio Mix with Sub ON menu entry.
• If the sub RX is turned OFF, the speaker outputs are identical, unless
stereo effects are in use or left/right balance is changed. Also
see AUDIO EFFECTS (AFX).
PHONES
Connection for rear-panel headphones, in parallel with the front-panel
headphones. Requires a 1/8" (3.5 mm) plug, either mono or stereo.
Plugging in headphones disconnects the speaker(s) unless the
Speakers + Phones menu entry is set to Yes.