Browsing the February SOS magazine I ran across this article: Understanding and Recording Guitar Speakers (http://www.soundonsound.com/sos/feb12/articles/speakers.htm). The thrust of the article is that guitar speakers are designed to be non-linear at virtually all volume levels. When impulse responses are used to model speakers, I understood that the underlying assumption is that the speakers are essentially linear. This article seems to indicate that IRs, which are linear, may not do a good job of recreating that response. Any comments?