Use the Z305 since 11/2012 on my PC monitor. Did not expect any miracles, but the sound find very acceptable. Advantage of the speaker can PC Monitor are clamped and on the desk there are no boxes around, a power supply is not needed. In the pouch you can take it good with a laptop on the road, handy little part. Bought 2012 for 32.52 the speakers on Amazon. Now it is for 239, - available. Is that a misprint or simply outrageously expensive? So much money he's certainly not worth it. For this price, there is only one star for the old price I would give it 4 stars.