Need manual for Wharfedale Linton 3XP speaker please. Stephen.

Stephan, I don't think there are any manuals around from the Wharfedale. In the seventies of the last century, speakers did not have manuals. I remember they came in a cardboard box, and the only thing they added was a paper, with the impedance and the power handling. And nothing was measured to a certain standard. I know you could destroy a 200 W speaker with a 25 W amplifier, taken you did put in the right (for the speaker the wrong) frequencies. Or what destroyed most speakers, was the certain switching on the amp. You recognise this on: you can't hear the CD player, pump up the volume to the max and then discover you are still on AUX. then without lowering the volume, switch to the CD and the full power comes to the speaker, putting the cones through the baffle.
The Linton 3XP, could handle 30 watt on 6 ohm. Putting it on a 8 ohm amplifier capable of 30 watt should be fine.

But what it is worth? My Kef Concerto's I bought in 1972, are still running. The were rated at 8 ohm for an amp of 25 watt, and the last 15 years they are connected to a 2 time 150 watt amplifier and often put to the test. They still sound as new. Or perhaps even better. No modifications, no new speaker, everything as bought 42 years ago.

If you think something is wrong in one or both your speakers, because you hear strange things, perhaps there are just some bad contacts in the cabling or in the filter. Check everything for bad contacts (soldering) and check the capacitors on the filter. Can't be much of a problem to find out what they used.

I did an extensive search in my documents, but even I can't find anything in my documentation.
I do remember, the brochures in those days were much better then the documentation delivered with the audio stuff.

And if you have a huge amplifier, don't hesitate to plug them on, but always be secure before switching on the amp. Learn to use any switch after you lowered the volume and you will be fine.

Success.