The X-W wasn't designed for use on a Jecklin; it too was designed to enhance stereo reproduction, but by a different method. The X-W's disc enhances the directional response quite a bit, about the same as a Jecklin (although the Jecklin will be effective at somewhat lower frequencies). But with the X-W, you'll get HF rejection at both sides (and above/below), that is not true of traditional omnis and Jecklin, where the HF only gets attenuated when incident from the baffle side. So I would consider such use experimental.
The X-M is well suited for a traditional Jecklin disc arrangement.
Many thanks for clarifying.. I had not appreciated that the X-W has freq specific off axis rejection and so if making a stereo recording you would typically use it in as spaced pair (or array) without a baffle..
If I were recording say acoustic or semi acoustic instruments in my home studio would I be better off with a pair of X-M and a jecklin disk (which I have) or a pair of X-W on their own would you say?
I notice that the X-W have a better s/n and although they won't handle as loud a source that should not be much of a factor in my case. Would there be any other differences to consider like mono-compatibility, holes in the sound field or fidelity of the recording ?
And am I correct that the X-M and X-W will power straight off a desk with 48v over a standard balanced connection?
Many thanks for your advice