Originally Posted by Dennis Erskine
Scott has thrown a piece of fat on the fire and is watching it sizzle and spit. Let's look a little deeper into this.
Speakers must be accurate...not at 1 watt 1 meter; but, at the listening position intended. If your seating distance is 20' and your speaker has a 1" dome tweeter, it won't be accurate at the listening position due to the significant loss in the high frequencies. If your speaker was designed to provide 20Hz at 105dB at 25' and your listening position is intended to be 6', it will take your head off. What is accurate? The speaker will produce exactly the signal presented to it at the listening position. If the signal is krap, you get krap. If the signal is magic, you get magic. (NOTE: accuracy includes SPL and does not include any attempts to make a bad recording better.)
Now room correction. We're talking about *room* correction. In a room (not sitting in the near, or very near field which in IMHO totally screws live recordings) in the area of 80% of the sound to your ears is coming not directly from the speakers but from reflections off surfaces in the room. You cannot correct an 80% problem with a 20% solution. Whether you are talking about automagic room correction or professional DSP equipment, you cannot even come close to "room" correction except in a few instances where you have an exceptionally large space (which has its own problems). There are two nice aspects of automagic room correction processors:
1. Consumers are becoming aware that audio calibration is important; and,
2. You can keep pushing the "calibrate" button until you get a sound you like better than the last time you pushed the button.
Room correction must include not only some DSP work; but, a great deal of attention to the room, its design and treatment strategy...including getting the ambient noise floor down to 21dB. Remember that accuracy thing? The softest sound on a track can be 22dB. If you cannot hear a 22dB sound at 22dB at your listening position, you no longer have "accuracy". No DSP or Room Correction software can overcome the laws of physics.
Excellent point about accuracy including SPL. This is why Speaker frequency response curves at 1 watt do not even come close measuring their performance.
Have you measured the ambient room noise in your room. Unless you have a true cave, 22 DB is not happening.
Turning off my AV and refrigerator get me to 40.
The Audyssey is curve rolls off the high end and turns on Dynamic Equalization. What's accurate about that?
The first thing I native when leaving Pure Direct mode on the AV8801 is a change in the phase that alters the stereo image.
This was also true of the Onkyo PR-SC5507. There is an anti into the game, that reduces the benefit for me.
So, we are back to each persons system and room and preferences are the determining factor.