They really, and I mean REALLY stepped up heir game in the built quality and sound quality department over he 15s. You will not find a better built or better performing ANC headphone the the QC 25. I've owned it all, including very nice studio monitors by KRK and M Audio, and more, and Bose is pretty phenomenal. Sorry, that's not so much an attack towards you as it is the mindless, ignorant Bose bashing. Please start your own thread if you wish to parade your ignorance about Bose. Their studio monitors are good but thats all that are worth buying. Again, I've owned studio monitors, and numerous other Hi-Fi gear, and BOSE really did it right the Companion 5's. Just wanted to update you all incase anybody here was curious in buying this set of speakers - well worth it. I'm confused between Logitech Z620'sa and the Bose companion 5 as i want to get a better sound and better build and a speaker that will give me almost a pure sound and with high good low for music,games and movies and i want something that will last for a long period of years Again, I've owned studio monitors, and numerous other Hi-Fi gear, and BOSE really did it right the Companion 5's.[/QUOTE Oh, and these walk ALL OVER the Logitech Z620's in sound quality. If you ever get one that's not performing the way it should, return it, and try a new set.

So, in short, ignore ALL the negatives I mentioned about these speakers in this thread. With the bass adjustment dial at half, the bass shakes my whole apartment more or less. I GOT A LEMON - Just got a new a set about a year ago - and ALL the complaints I had with it are gone the bass is incredible, VERY controlled and detailed, and this is from someone who has listened to, again, very high end audio solutions from B&W, Klipsch, Polk, JL Audio. UPDATE - Decided to try the Companion 5's again, just in case I got a lemon the first which was why I was initially disappointed with the sound.

Bose companion 5 speakers software