[Elecraft] headphones for k3 / kx1

[.k8dd.]

I've been real happy with Sennheiser PC350 headset/boom mike.
Features
     * Noise isolationg earcups
     * Noise cancelling microphone
     * E.A.R. system for critical location of audio cues
     * Replaceable earpads
     * Connects to PC soundcard via dual 3.5mm jacks

Technical Data
Cable length 	9.8 ft. (3 m)
Connector 	Two 1/8� / 3.5 mm plug
Distortion 	< 0.1%
Frequency response 	10 Hz â?? 26,000 Hz
Frequency response 	50 Hz . 16,000 Hz
Headphone 	Around-the-ear, closed
Impedance 	150 Ω
Pick-up Pattern 	Noise cancelling
Sensitivity 	108 dBSPL
Sensitivity 	-38 dBV at 94 dBSPL
Speaker data 	Dynamic, 38 mm, Nd magnet

Not exactly the 200 or so that I guess the K3 wants to see, but close 
and they are  very much more comfortable than the Proset's or JBL's, 
even after 4 or 7 hours in front of the K3.
MSRP is over $200 but with some looking and searching you can find them 
for around $150.

73    Hank    K8DD


Paul Christensen wrote:
>> However being that you mention the K3 you'll want to either ensure you
>> use higher impedance headphones or ensure that you change the series
>> caps in the headphone circuit from 10uF to 100uF.
> 
> Not too many high-end headphones will be available with an average Z of more 
> than 100 ohms across the audio spectrum.  With the stock 10uF caps in the 
> K3, one would need to find a set in the area of 200-ohms or so to extract 
> decent low-end response.  When you get up in that Z range, the available 
> headphone options quickly diminish.
> 
> Several SMD replacement caps exist for the K3's headphone coupling caps at 
> C9, and C13, but Mouser P/N 647-UUD1A101MCL (made by Nichicon) is a good 
> choice at only 65-cents each.
> 
> Paul, W9AC