Re: M50s: what's the extra driver supposed to do?
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Joined: Aug 2004
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Well, I'm using my computer to generate test signals, and the SPL meters God gave me, and the results have already been revealing. I'm amazed at how much the sound of pure sine waves is affected by placement.
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Re: M50s: what's the extra driver supposed to do?
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Joined: Feb 2004
Posts: 619
aficionado
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aficionado
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Avia is a home theater configuration DVD. And Radioshack sells the SPL meters for about $40 or so. If you search around on hre there's a number of threads that discuss Avia vs. other configuration DVDs (they have various test tones and video calibration tools.)
[black]-"The further we go and older we grow, the more we know, the less we show."[/black]
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Re: M50s: what's the extra driver supposed to do?
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Joined: Apr 2003
Posts: 16,441
shareholder in the making
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shareholder in the making
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In reply to:
I'm amazed at how much the sound of pure sine waves is affected by placement.
Actually, pure sine tones are not the best test tone to use when calibrating your system. Since they are made up of single frequencies, they are highly susceptible to destructive/constructive interferece from room reflections. A broadband test signal like pink noise is much better since it is made up of a broad range of frequencies.
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Re: M50s: what's the extra driver supposed to do?
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Joined: Aug 2004
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Right, that's why I'm observing such dramatic effects, but I would have thought that you'd want that isolation for calibration...no?
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Re: M50s: what's the extra driver supposed to do?
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Joined: Apr 2003
Posts: 16,441
shareholder in the making
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Do you use a variety of frequencies when you calibrate with sine tones? If not, then you're only calibrating for one specific note.
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Re: M50s: what's the extra driver supposed to do?
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Joined: Aug 2004
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A handful of frequencies, but I haven't done any calibration yet (as though I knew how!), just moved things around a little and marveled at how different it sounds.
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Re: M50s: what's the extra driver supposed to do?
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Joined: Oct 2003
Posts: 604
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Most people don't have multi-thousand-dollar RTAs (Real Time Analyzers)... I find my SPL meter (with the correction table) and a sweep generator (run on each channel independently and then on both) gives me the best results.
Using pink noise to calibrate levels of components such as a subwoofer settings and parametric equalizer frequency, level, and Q settings, would require an RTA. While the results of calibration with this kind of setup are usually more linear than with a simple SPL meter and sweeps, the latter still offers a great performance/price ratio.
Pink and white noise used to calibrate levels between different channels, however, is very useful, and you only need a simple SPL meter to do this.
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Re: M50s: what's the extra driver supposed to do?
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