I put this in a previous topic as well,this is a late reply, I am aware of it, but I'm going to post it anyways as an advise to future buyers.
So I bought the 450H together with a 410 cab about 2 years ago i think.
Overal I'm pleased with the sound, but I think it's mostly the amp that gives you a variety of sounds, and it lets you blend channels nicely.
About the cab I'm not so pleased, mine says "made in India" so I got suspicious, but I was already pleased it didn't say "made in the People's Republic of China"
It struck me how badly it was finished, here and there there is a gap in the covering material (it's not tolex, it looks like a really thin layer of truck bed liner to me), mostly at the joints between different MDF boards. Then the plastic covers for the cutouts (where the head sits) broke of after a few weeks of rehearsing. The screws that were used to assemble the thing started to oxidate after a few weeks...
Yesterday the tweeter (horn, generic marshall?) broke down while playing, it started rattling really bad, I was playing on the "classic" channel, no effect pedals, the gain cranked up 8/10, channel volume on 4/10, master on 2/10, attenuator fully engaged.
It's a budget rig but it shouldn't break after only 2 years of rehearsing and the occasional gig. A replacement horn costs 35 euros...
I wouldn't recommend buying this setup, maybe play the head trough a different cab, I don't know, it's my first "real" cab. For the same money I would buy a hartke amp+cab instead today.
If anyone can point out what I did wrong with the horn, please elaborate, maybe email me. Any hint or help is welcome.