Bought this brand new from KC Strings here in St. Louis. My visit to the store was my first time ever touching an AUB but I have always wanted one. This one was probably the third one I tried and as soon as I played the 1st note, I knew this was going to be my bass! It has a very 70's vibe, with a huge 'Ooomph' type attack and a very mean growl too! This is their Krutz Series 400 model. The picture does not do it justice but is a very beautiful and well crafted (from what little I know) instrument and the folks at the store were most helpful, even giving me a few lessons on how to stand with the bass, right hand and left hand technique and using the bow. It was a really cool experience and I will definitely be doing business with them should I have a need. The main reason I am posting though is, CARPET! When I got the bass home, the first thing I noticed was that it sounded a lot darker and quieter than it did in the store. So much so that I put some Spiro weichs on, which I really like, but they didn't really do much for the dark/muted tone. On a whim, I took the bass to the foyer, which has a wooden floor and wow! Next, I tried it in the kitchen and all of a sudden I could hear all these wonderful overtones (like faint bells behind the notes) and finally, I tried it in the laundry room with the door closed or open, and Boom!! The bass hits like a cannon! I am removing the carpet and putting down wood flooring as soon as I can afford it, lol!