I'm considering buying an Optimum AV Hi-Fi rack and putting a big Sony Wega on top. If I were to put a centre speaker on the bottom shelf, about 10-15cm off the floor, would it sound odd? The top of the TV would be about 1.7M from the floor, which means it would be a very large gap down to the centre. Could this be improved by angling the centre speaker upwards? Thanks.