I would prefer followings;

1. a stereo audio output which can be connected to PC audio input.
2. a VR for changing SP output level without changing KX3/KX2 AF VOL

These are useful to operate digital modes.

73 de JH3SIF, Keith
 
> 2018/04/13 2:06、Robert J. Morris <ag...@iloc.com>のメール:
> 
> I've built a prototype powered external speaker for the KX3, and would
> like some feedback on what folks would desire in terms of features, and
> whether folks would want to own one. 
> 
> The speaker currently is designed to match the overall look of the KX3
> and PX3, and accept similar third-party panels and covers as for the KX
> line. Presently, it uses the same legs and feet as the KX3 and PX3, and
> is the same height and depth as those. There is one USB port for
> charging the internal lithium battery, and input and output stereo
> jacks. The speaker is mono. The output jack redirects the right channel
> from the stereo input for a second speaker, just like with the Elecraft
> SP3 and other similar external speakers. The speaker is amplified. 
> 
> The SPX3 puts out a maximum of 3W, and is about as loud as any external
> radio speaker gets. Volume is adjusted by the KX3. It plugs into the KX3
> PHONES jack. There is a built-in low pass filter to reduce noise and
> improve the listening experience. 
> 
> The prototype, as you'll see in pictures in the links below, is slightly
> narrower than the expected finished product. The speaker driver and
> on/off switch are both waterproof, but - just like the KX3 and PX3 - the
> case isn't. So, don't drop it in a lake. It will handle all conditions
> appropriate for the KX3, and is meant for indoor and outdoor use. Having
> matched the case design so closely to the KX3, it isn't as airtight as
> I'd like it, so the next prototype will have the case halves join in a
> more customary way, but remain the same dimensions and overall look.
> This will also improve ingress protection. 
> 
> You'll see the speaker is not a polished finished product yet, as it's a
> rough first prototype made by hand. Your feedback will assure the final
> product is what you want gracing your portable shack. 
> 
> Please note, the KX3 in the photo is only to demonstrate the speaker. 
> 
> All feedback is welcome. Please let me know which reasonable
> enhancements or simplifications you'd like to see.
> Examples:
> * Would you want an output USB port to use the speaker to charge your
> phone?
> * Would you want to dispense with the built-in battery, and run it
> entirely from external power?
> * Would you want a second passive speaker driven by the first to save on
> weight and cost? That is, a SPX3A (active, with battery, charger, and
> amp) and SPX3P (passive, with only speaker driver)
> * If you're a KX2 user, would you like me to produce the SPX2 (also in
> development)? 
> 
> Pictures:
> SPX3 with KX3: http://www.iloc.com/ag6zz/SPX3/AG6ZZ_SPX3_KX3.JPG
> SPX3 Left Oblique:
> http://www.iloc.com/ag6zz/SPX3/AG6ZZ_SPX3_LeftOblique.JPG
> SPX3 Right Oblique:
> http://www.iloc.com/ag6zz/SPX3/AG6ZZ_SPX3_RightOblique.JPG 
> 
> 73,
> Robert (AG6ZZ) 
> 
> SPX2, SPX2A, SPX2P, SPX3, SPX3A, and SPX3P are Trademarks (TM) of Robert
> J. Morris
> SPX2, SPX2A, SPX2P, SPX3, SPX3A, and SPX3P are Copyright (C) 2018 by
> Robert J. Morris
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