Originally Posted by Magellan55
Heck my Sony AVR sets my tiny 3" Take sats to "large" during cal! They only go down to maybe 100 Hz.
Is there an AVR that DOESN'T set speakers to large during cal?
Darth already gave you a good answer, but I will expand on it a little bit. When you put a speaker (or a subwoofer) inside a room, its bass capabilities change, partly as a result of boundary gain (proximity to walls which amplify the bass frequencies). Speakers can also have bass attenuated, due to room modes, so the bass capabilities can be reduced by the room placement, too. Having an AVR detect speakers with 3" woofers as "Large" is pretty unusual, but the basic principle is the same for all AVR's and calibration procedures.
When a calibration is performed, most AVR's will be measuring the frequency response at the main listening position and assigning settings of Large, or Small with a crossover, based on their <40Hz response. If the speaker (or pair) measures <40Hz at the MLP, the speaker is set to Large. And, if the speaker measures higher than 40Hz, the speaker is set to Small and a crossover is assigned. Some calibration systems are probably more accurate in their measurements than others, but I believe they are all working on the same basic principles.
That initial assignment is not
a recommendation. So, your Sony AVR is not telling you that you should
operate your little satellite speakers as Large, or even with a 40Hz or 60Hz crossover. It is merely informing you that it detected a FR consistent with its programming for Large. It is up to the listener to decide what to do with that information. And, of course, the standard advice is to set speakers to Small with crossovers of about 80Hz. This aspect of HT is one of the most confusing to many HT owners. Why did my AVR set my speakers to X, and what should they really be set to?
The only thing that is perhaps more confusing is, why does my subwoofer sound so soft after a calibration? The answer is that all of the channels in an HT system are initially intended to play at the same volume at the MLP. But, we don't hear bass frequencies as well as other frequencies, depending on the listening level. So, we have to adjust our subwoofer volumes to suit our own listening levels and preferences, after a calibration. If there were more information circulated on why AVR's set speakers the way they do during a calibration, and why they set subwoofer volumes the way they do, life would be simpler for most HT owners. [IMG class=inlineimg]/forum/images/smilies/tongue.gif[/IMG]
Both of those things are explained in detail in the Guide, linked in my signature, but I'm not sure how to make the explanations any more available to people who are curious. They are certainly natural questions for anyone to ask. [IMG class=inlineimg]/forum/images/smilies/smile.gif[/IMG]