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Actually, we were using the 35 which is the Dell Axim based unit. I do not have enough "seat time" with the 35 to say how well the other features work, but I am betting that they are good. Even though we own a few of the NTI handheld analyzers, I can say for sure that the Ivie 35 is a better...

?? This is not about testing mics. It was included in a test of meters / handhelds vs. known solid test platforms (AP / Listen / Clio / MLSSA). The microphone tests and comparisons are there for a couple of reasons, one being to demonstrate the similarity between the 2 upper end mics, the 2...

The issues I have observed are from 500Hz and down. I think that is what you meant, but want to clarify that. I do not know what the version details are, but I am sure it is current as this test was done only 3 weeks back and the program was newly downloaded . At some point, we will have...

John- We calibrated per the instructions and I am sure that it was tested using 2 different sound cards since the results were not what we anticipated. I am not certain of the specifics other than once setup and running, a basic R&R test using REW was poor at the lower end of the scale. Compared...

I do not know the specifics of the setup where I sit; I am 8200 + miles from our lab in a hotel room, but I can assure you that my staff gave this program every bit the same care as Listen, MLSSA or Clio… Being the owner of a service company that is known for expertise in difficult test and...

Just FYI- The price point where things start getting reliable and repeatable from my point of view is with the NIT Minilyzer - about $600 I believe. I am not a purchasing guy- please do your own research on costs, but I think the NIT rig I am taking about here is under $700. Earthworks...

My technical staff had done such a study a while back for a client who is doing a auto-EQ feature on a integrated product. We did the lab and real world testing using an array of mics and available equipment. This may be a painful post for some to read, but I had promised to share the info when...

For the foam to paper bond, you want to use a latex or starch based adhesive. DO not use an epoxy or acrylic and certainly not a rubber based adhesive- these are likely to damage the foam surround. If you can find a latex adhesive, use that- most importantly, let it cure in a well ventilated...

At least you have good taste in cars / vintage. My bottomless money pit which I seldom even get to drive

Bobby- How they get 400 watts in, 700 watts out- Keebler style, Elf and magic. ;) Seriously, do the math on the wattage numbers. Assuming that the numbers are the real deal (not ILS ratings) then the difference between the 90 WPC amp and the 110 WPC amp is very small in terms of actual...

The TC sounds factory pics- Reminds me of a place I saw in India. And that open cap bank on the magnetizer- they are going to kill someone with that thing. They could use some serious housekeeping and equipment upgrades.

OK, this is a perfect example of how the Denon AVR 4306 is actually smarter than me and a couple of my staff. We had a visitor in the listening room today and after leaving them alone for a while, we returned and there are no vocals on the center channel. Audio= yes, but vocals = no. We have...

Bobby- With all that extra cash, you can hire me to design and validate your systems, select manufacturing centers, get your S&R certifications, FCC work done, validate the packages, provide a QA plan, DV and PV startup work and get you into production. That way, you do not have to worry about...

I like the Polk stuff better, but sound quality in a speaker like this is so dependent on environment that how they sound in the store is not how they will sound on your porch. Note that these are not outdoor speakers and the lifespan may be limited by the environment; depends on so many...

I am not sure what is available to the DIY market. Some stuff may be, but in general, I am doing a transducer design to match the system requirements. A lot of time, this is taking a standard or semi-standard driver or platform that some vendor offers and doing some tweaks to it to change...

Bobby- My suggestion is to get the book in your hands and go through it a few times. Doing so will let you learn to make a few of the decisions on your own and when something happens (good or bad) you will have a better feel for why that happened. I did not suggest using that driver mainly...

OK, It is one of the best 15" DVC drivers for DIY home theater projects for the money. Of all the drivers I have ever seen, it is definitely one of them. My basis for "knocking it" is not the specs alone. Looking at the published parameters, I have a basic feel for the overall performance...

Bobby- I suggest reading the book and learning all that you can. In the mean time, I suggest writing a spec sheet for your system and use it as a roadmap for your project and to identify all the stuff you need to learn. I am a little reluctant to post specifics or my opinions if I am going...

Robert- You are entitled to your opinion of that driver as am I. For me, my comment about the driver stands as is, but I will explain a bit further. From what I see after reviewing the listed specs, that is a basic driver and yes, you can do a lot better. I did not say it would not work...

I suppose that will work, but the box is going to be big. As in very big. Look at the Vas on that driver- 280 liter is a deal breaker in my book; I would spend some time looking for a better driver and build a reasonable sized, good sounding sub with some power handling. I attached a screen...

Post a link of the driver you are currently considering. You mentioned not liking the sound of an MTX sub. Ask yourself, are you listening to the driver or the system? If the system tune is incorrect or inappropriate for a large environment, yes, it is going to sound crappy. However, do not...

Ha - If you can do accounting, you can in fact _absolutely_ do all the necessary math and 'figgerin to make a good sounding sub and probably do a great job putting together a good system. Reading the cookbook is a very helpful aspect as well- good stuff.

BobbyG2- While I will not give you specific info on how to build your system, I can give you a few bits of inside info. The first money you spend should be on Vance’s book – “The Loudspeaker Cookbook” Get it, read it, learn it, live it. Vance knows system design and what you are getting into...

You may also want to consider the placement of the sub in the room. If your sofa is near a wall, you may end up with overwhelming bass or significant dead spots (mainly the listening position) if the sofa is near the middle of the room. I would play with this a bit using a working sub before...

I am familiar with the diaphragm material that they are using (Rohacell) which is some pretty cool stuff if you can get it to work. I have done a couple of products that use the Rohacell foam base and it is pretty good when you are talking piston mode; for a sub, it is really good. I actually...

Speakers- Mostly one-off, prototype or DV run stuff; we are constantly going through speakers. We do have what we call a "house" system which is pretty cool. All handmade, exotic cone mix and geometry as well as some pretty cool componentry in the filters. Nice tweeters, basic cabinets. Krylon...

Thanks for the link- Yes, looking at pretty well the whole range there. And yes, the point is to see how accurate and mainly how repeatable the devices are from measurement to measurement.

I kinda figured that you had solid reasons, but wanted to give it a shot. ;) I think the RTi 4 is a good speaker for the money, but there are a lot of competitors out there with similarly good product. Frankly, I would suggest that you listen to several different models and try to find...

Some of the more experienced installers may flip out at my suggestion, and this may not work at all in your home, but here is my thought- How about rotating the setup 90 degrees clockwise. Puts the mains, sub and center on the 18 foot wall and gives you a lot of room between you (on the sofa)...

Kevin- I do not have a bias except that I do not anticipate fantastic results in terms of the calibrated accuracy, but hey, we are talking about low cost stuff and in most cases, it is used as a relative measurement device. We do have some of the NTI hand held analyzers at the office, but I...