Tuning speaker / room response?

I'm also impressed with the graph. I don't have a web server at my disposal--so I doubt I'll try this at home. As to the problem. A couple of things, the meter should be on slow response. I've done it both ways, it doesn't seem to make much of a difference so I believe your graph is close to accurate, with the exceptions of Sean's post (which I'm very interested in the website). Mikec's post points out some very good areas for info. However, I'll bet you have a little over an 11 foot span between walls, or that's your ceiling height (or close 10.5 feet). Room tuning works very well about 125Hz. It does work at lower frequencies, but not nearly as effective. That bump at 50 Hz will be difficult to correct without electical correction. Most people, including myself, consider equalizers a measure of last resort--but if there is no other way--it will make a big improvement. Infinity has a single notch filter on their new speakers to accomplish exactly this. Tact has been making digital correction systems for sometime. Perpetual technologies also has a digital domain correction engine (but this only works if you ONLY listen to digital sources throught the Perpetual technologies P-1A). It seems to me there is a market for a very low noise low frequency addustable notch filter. This is such a common problem. McIntosh made room correction equalizers. They are very good--but something simplier with less noise would be prefered. Looks like an opportunity for someone or some company.

Njonker, is it possible for you to show the graph of your room before treatment with the toolbox. I've been intrigued by this product, and was wondering just how different the results were.