I have a chance to aquire a set of HP 420 JBL towers. They seem to sound pretty good(I do not have an audiophile ear) but know very little about them. They are black and are hexagon shaped. The only visable speakers are a 4 inch mid-range and a tweeter, there is also a bass adjustment knob on the bottem of the speaker. If anyone has used the speekers or has heard of them and could give me a idea if they worth anything that would be great.