Ive just taken the x-over off the back of the "MLS" to check and what I ended up with was 0.47uf (green oblong -like a candy!) in series and 22 ohm 5% wire wound in parallel to neg rail. There are also some inductors in series with the Wharfedales and a 1 uf (green rectangle, not electrolytic)in parallel to neg rail. this is the area that needs attention I think.