[quote name='skankdelvar' post='433681' date='Mar 13 2009, 02:19 PM']Ah ha! This is an old favourite (try searching this sub-forum for similar posts - there are many).
Just to save you several hours of your life that you'll never have again, here's a quick synopsis of what [i]may[/i] happen next:
Some will say it's perfectly acceptable and sounds fine. Others will say it's a bad idea because they feel you shouldn't mix driver sizes and it will sound awful.
If you're very lucky (or unlucky), a few experts will get into a flame war using terms incomprehensible to many. At this point, your thread may move somewhat off-topic.
Coming back to planet Earth, it may be suggested you sell your 4x10 and instead stack a column of 2 2 x10 cabs on their sides for 'enhanced dispersion' and to 'minimise comb filtering'. Someone else will point you at their 2x12 cab in the 'for sale' section on the grounds that it's better than a 4x10.
Just when you're losing the will to live, you'll get a suggestion that you just give it a try and see what you think of the sound, while ensuring that you comply with connection and impedance recommendations when running multiple cabs (see sticky).
I'd go with the latter.[/quote]
epic