most effective bass traps

Read everything you can on the www.Realtraps.com website. They give you the best information with wonderfully comprehensive details.

FYI: Foam is not all that effective as a bass trap even if the website selling it says so. Compressed fiberglass or bonded acoustical cotton are leagues better down load and across the board.

Do a search here for "superchunks"...you find all sorts of links. One of them has test results plotted. SC's will match or beat nearly anything out there for a whole lot less$$...and they can look nice, or invisible if you finish off the corners of the walls.

Thanks for all the responses thus far. I have seen the data on the Real Traps and other websites. It's difficult for me to view the data as objective since I have no direct knowlege of the subject and the results support the product being advertised. Asthetics is important. Interestingly, I just had my room professionally acoustically treated. The focus was on the upper frequencies. The reason for asking this question is just in case this treatment leaves any low frequency issues unresolved.

Shadorne

As an aside, I enjoy your well thought out responses to many questions on this forum. Am I correct to assume that using corner traps, such as ASC tube traps, is virtually always likely to improve bass response? One nearly always sees them in every high end store/room/show/ etc. in all 4 corners. I have some ASC traps already, and aesthetically these will probably be the best fit for my room.

I found this comparison of 3 different traps and a lot of info where I found the link.

http://forum.studiotips.com/viewtopic.php?t=537
http://www.bobgolds.com/AbsorptionCoefficients.htm

The results are so uniform and illogical, it only goes to show the flaw of the test. The microphone was in the room's 100 Hz null. Perhaps, the best trap actually reduced the null and had the least measured absorption. I can't see any conclusion from this test.