No,Peter, it "acts" like a filter to focus on CW frequencies between approx 500 to 700 Hz while downplaying higher frequency noise.  Good stuff available via Google and Youtube and page 43 of current QST 
73, Stan WB2LQF

On Mon, Feb 06, 2017 at 09:01 PM, Peter Lambert wrote:

G'day,

CW resonant speaker ? - does it have a filter in it ?

If the frequency is significantly different to the KX2's filter it would explain the extremely low volume.

73's Peter VK4JD

-----Original Message-----
From: Elecraft [mailto:[email protected]] On Behalf Of stan levandowski
Sent: Tuesday, 7 February 2017 11:48 AM
To: [email protected]
Subject: [Elecraft] KX2 speaker/headphone question

Hi folks. I need some assistance. Is the KX2's headset jack "padded" to protect hearing?

I'm asking because I built the "CW Resonant Speaker" in the current QST and it works great but the volume is so low that it's unusable.


Do I have to take the speaker output directly off the KX2's speaker terminals to get more volume?


Thanks and 73,
Stan WB2LQF


Sorry for the bum post; fat fingers!!
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