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I was planning on using a roofing cement and sand mixture as an extensional damping compound on some loudspeakers that I am building. I just realized that the stuff I bought is solvent based, and I know that both Weems and Dickason have warned against using solvent based products on loudspeaker...

Hi Rob, The best thing to go to your local home audio dealer and listen for yourself. When I was shopping for speakers several months ago I was surprized to find that some Celestion speakers sounded much more clear and natural on certian cds than some Boston Acoustic speakers. I was...

Steve, Absolutely not! If you want the deeper bass, go for it. You're talking to a guy who destroyed his first DIY sub with the 1812 Overture. :) It all depends on your musical preferences. All that I'm saying is that the minimum low frequency extension for good music reproduction is ~ 40...

Robert, The bass will only sound natural at reference levels. If you watch at lower than reference levels, you will need to boost the low frequencies to compensate for the fact that our ears are not very sensitive to low level, low frequency sound. Some times sound processors have a...

Jonny, So you want the boomy car-fi sound do you? on purpose? Using an EQ will get you there. Just boost the bands in the 40 - 80 Hz range. It will be sounding like a boom box in no time :D. Although I have never used one, you might also get what your looking for with an Aphex Aural Exiter...

I was wondering if anyone has built there own DIY quadradic residue diffusors? And if so how was the result? What type of material would you recommend to seperate the wells? Travis

It's not surprizing that the image sounds more natural with the subwoofer placed more towards the center. Most recievers cross the subwoofer over at about 80 Hz. Some directional cues still come from the subwoofer. Travis

Zach, This thread reminds me of when I first built my own subwoofer. It cost me ~ $500 to build, and when I tried it out for the first time, it didn't sound as loud as my old Infinity BU-2 subwoofer, even when the gain was turned up quite high. It sounded as though something was missing...

No Glenwood. It depends on the type of program material that you are playing. Music generally has little energy below 40 Hz or so (subwoofer range). There are some exceptions with electronic music, large organs, and the 1812 overtures cannons. However, special effects in movies frequently...

Thanks Jesse, On mine the three options are, MAXIMUM, TV MODE, and STANDARD. In the instruction manual it says that the STANDARD option provides a "standard" amount of compression. It is obvious, while watching movies, that all three options provide a quite substantial amount of compression...

I just purchased a CyberHome CH-DVD 500 DVD Player at my local Best Buy. I was very pleased at the fact it had the DD and DTS Decoder on board (especially considering the low price.) However, when I got home I was extreemly disappointed to discover that there was no way to turn off the dynamic...

I promised myself that I would not post in this thread anymore. Kevin, I belive that you have two different phase issues confused as one. Issue #1 phase difference between high-pass and low-pass sections of a loudspeaker system. In this situation the two signals are in different bands and...

Kevin, its been fun debating with you but this will be my last post in this thread. a) I agree that minimizing boundary effects is very important. b) I disagree. Crossovers can be forced to sum flat if you alter the XO frequencies and slopes. Flat response is more important than minimizing...

I probably will read that Audio Perfecionist link. Unfortunately, I don't have the time to read that other advertising propaganda;). Travis

Maybe they would but I don't really care. There are alot of loudspeakers (the majority actually) that do agree. The research has shown that phase distortion is generally inaudible under normal listening conditions. There are a few exceptions. Phase shift between drivers is more audible with...

George, If you set the XO to a lower frequency the LFE gets thrown away. It's a seperate channel meant to go to a subwoofer. The reciever can copy bass from the L/R/C (left, right, center speakers) and send it to the sub but it can not send LFE to the L/R/C. Travis

I read a review for this system. The reviewers gave it a poor review. I wish I could remember where I read it. Travis

Michael, If you were to cross your sub @ 100 Hz and your L/Rs @ 60 Hz you would get a 4 or 5 dB hump in the frequency response between 60-100 Hz Kevin, Brian is right. The more crossover frequencies that you add, the more phase issues that you have to deal with. If these issues are not...

sounds like it would work as long as your mike isn't rolling off at low frequencies.

Joe, TS parameters are not a usefull way to know the quality of a speaker IMO. They can be an indicator, but nothing more. Mainly TS parameters can help you decide if a speaker is suitable for a particular situation, and to help you predict the way a speaker will perform in a given box. The...

Brandon, I know books can be expensive and loudspeaker design is not a quick and easy hobby. But you know what they say... Nothing worthwile comes easy. The challenge half the fun. Maybe you should have your local library order some of the books I mentioned above. Not only will you get the...

Joe, I know exactly how you feel. What helps me is every time I have a question, I go to half a dozen forums and ask the same question on all of them. The links sections of audio web pages are great places to find these forums. Chances are at that at least one person's reply will be phrased in...

The carpet will absorb virtually no sound at those low frequencies (unless you have carpet > 6 ft thick.) Travis

I understand that the MTM provides better imaging, which makes me wonder why anyone would choose the 2.5-way format. Is there any "pros" the 2.5-way has that the D'Appolito design doesn't? Travis

As I understand it BFD automatically adjusts for a flat response when you have a calibrated mike hooked up to it and feed a little pink noise into the room. I also understand it has an adjustable subsonic filter. Has anyone here tried using it with a dipole subwoofer to get the 6dB/octave boost...

Javier, You know the value of visually discrete video speakers. I think it's important for the speakers to dissapear when the lights are turned down low and the movie starts. If your speakers fail here than they will be distracting, and won't provide a good illusion. But that aside, If...

Hi Javier, Are your Def Techs Bipolar speakers? In other words are there speakers on the back of the enclosures? If so the bipole radaition will be mostly lost (a good thing IMHO). Also since your speakers are designed to be placed out from the walls, putting the speakers in the walls will...

Solid wood is not the best thing to make enclosures out of because vibrations travel through it easier than through MDF, particle board, or plywood. It is not just a matter of price. Because these woods are not one solid piece with a grain running in one direction, vibrations are not transmited...