Speakers for Mc240

Speakers you say, I missed that, I went straight to what preamp.

I find 40 wpc not enough for 90 db sensitivity for a main system, so you might get a lot of people recommending Klipsch Horns, Cornwall, .....

however if a secondary, like my office, or never going for big powerful bass, I’m actually quite happy using a small tube luxman SQ-N150 (it delivers beyond it’s 10 wpc/6 ohm rating) to drive a pair of restored AR-2ax which are 90 db, 3 way, 10" woofer, enough that I don’t add a sub. I highly recommend AR-2ax, they have no vents, and actually fit on a bookshelf, and have a pair of level controls to adjust in any listening space.

https://www.audiogon.com/systems/10092

In my case, for Phono, the Luxman has built-in Phono, MM or MC, (single 0.33mv/100 ohm setting), So far, I have only used MM in my office.

Look into an AVA FET-Valve CFR all tube line preamp. $2299.00

For speakers, the Fritz Carbon 7 SE have a smooth impedance curve and are a perfect match with any tube amp. $2950.00 per pair and you’ll want some sturdy 24” stands. 

for speakers, we need a better idea of the size and use of the space, (and prior speakers you have liked).

i.e. small space, my prior office setup was a small pair of Wharfedale 225 speakers with 6.5" driver and a single self-powered sub, just enough from the sub that the small mains (like the Fritz mentioned) didn’t sound small or the amp need to try too hard. Larger space, I would prefer larger speakers, like my change to the AR-2ax, OR, a stereo pair of self-powered subs located near the stand mounted small mains.

I love my Wharfedale Super Lintons with my Mac equipment but limited to moderately high listening levels. If you wanted to rock the house out, I would suggest other options. Probably Sonus-Faber.

Listening to a hot rod MC240 as i peck out a somewhat informed reply…. i vividly remember it coming in the door in 1965…. I’m currently running some TAD ME-1K with a JL sub but the amp is capable of a lot…you can see it paired w all sorts of speakers from ESL-63, Cornwalls, etc in my virtual systems pages.  Since you are UK based, i would get the best NEAT you can afford keeping in mind a well sorted MC240 will typically make 52wpc , or any of the 200 ish mm BBC spec speakers. you also might be shocked how good a NAIM preamp might sound w 240 ( i actually know…vs just reading about it… ditto the 110Z

also do not be afraid to use Mullard in the front end of the 240. Do absolutely make sure the filter caps are in good shape… the power transformer is… rare…and near unobtanium….

have fun. enjoy the music