I have finished my pair of Triton MLTLs !

These were designed originally as a standmounter by Jeff Bagby, and then extended by Dr. Jim Griffin as a 'Mass Loaded Transmission Line' design.

You can see more here - DiyAudio Forum Post - I call mine "Copper Reflections"

and here are some photos -

The carbon fibre on the front is called 'Copper reflections' , hence the name. And it ties in with the copper coloured dustcaps of the CSS drivers.

My 'Resident Interior Designer' told me that speakers should be nine inches wide ( I never knew that hi-fi rule ! ) and so I thought I would put extra side panels onto the original

design. Dr. Jim was extremely helpful and patient, as ever; and agreed that a protruding baffle would help keep the 'baffle step effect' in line with Jeff Bagby's crossover.

The extra sides are then composed of 3/4 inch solid oak quadrant in front of pre-veneered mdf panels. I can thoroughly recommend the extra-thick panels;

another step up in clarity and detail, due to less box colouration. The top is also solid oak.

How do they sound ? -

Superb. - For a small room, it doesn't get much better. The midrange is to die for, extremely good at vocals. And in fact, if I go back to my B&G Radia 40's as a midrange, they suddenly sound very 'metallic' , which I never noticed previously. The cone material was invented at Leeds University, so it must be good, right ? And if its good enough for Wilson Benesch, its good enough for me !

Jeff Bagby reckons that the CSS tweeter ( LD25X ) is a gem, I haven't heard any reason to argue.

The bass sounds very similar to sealed bass, precise and detailed.

Jim's design gives a very efficient speaker ( 92 dB ? ) , so the speaker sounds relaxed, and the music can breathe. They seldom need more than 15W per channel

I used the slot port option ( hence 7.5" length, giving F3 of 35Hz ). Lambswool stuffing kept clear of the rear of the drivers using small plastic 'speaker grilles'.

I must mention Wilmslow Audio, near Leicester, who CNC cut the panels to my Autocad drawings.

Initially the midrange is a bit forward in the mix, and has a coloration to it. At ~ 100 hours run-in, this disappears, and you are left with a very neutral well-integrated speaker.

At 200 hours, the bass comes up more, and at 300 hours is probably 'fully there'.