howaya, steve here. i know we've met a few times over the years.

where are you based?

Good to see another Irish builder . 

Good to see an Irish build, whereabouts are you??

yo. yep that's me. and i've built mt121s too. i put 6 handles on them.. not sure if they're all needed but i do all my stuff alone so always try to make everything as managable / liftable as possible. here's my mt121 thread from a few years ago... still haven't built the second pair heh. (link.

i'd say definitely don't skimp on the high driver / horn. 900hz or so up is such a huge amount of the overall sound of a system.

i'm often not happy with the sound of mine. but sometimes i am. i've never heard another pair of mt121, with any drivers. i don't have any other 1.4" drivers that i'd take down to 900hz or so, so i can't swap mine out to test. i've never felt like spending on another one just as an experiment to compare to what i have.

i have however decided that i want to play with making the next pair of mt121s three way, with an upper midrange horn too.

so.. looking forward very much to someone else over here getting some together, and possibly being able to play a bit more at comparing stuff!

yours is a good plan. if you ask around the south, there may well be a pile of hd15s not getting much use. sol in clare and some of his mates built a big heap of scoops and hd15s some years ago.. you never know.

i should try to find some more photos of my mt121s as they're finished.. to show the handles.

Got any amp ideas yet man?

Mt121s dont have passive crossovers so you will need and amp for the comp and an amp for the mid horn. So thats 2channels for one box (bi-amp)