soffit mounting Tannoy Little red's

Hi I've started another thread about my new build here: viewtopic.php?f=2&t=13722 hope it's not too confusing to ask another question in the speaker dept. wanted to know if I can soffit mount my speakers. They are pretty old, passive speakers - Tannoy little red's, with 12" drivers - they are dual concentrics, but think that that's not a problem - I just need to be aware of speaker height - I'm driving them with a quad amp. I like the idea of soffit mounting them - wondered if you guys reckon it'd be cool to do it? cheers chris