Originally Posted by arnyk
My friend, you just proved (unfortunately once again!) that you don't understand dynamic range.
Dynamic range is not about turning down or up, it is about the ratio
of the loudest sound to the softest sound. When you turn the volume up or down you don't change the ratio of the loudest sound to the softest sound unless you turn things up so loud that there is clipping and parts of the loudest sound are lost, or if you turn things down so far that the music gets buried in the noise.
If you turn something down you are reducing its output and thus its audible impact. Thus if you are listening at 85dB and you have a peak (in live performance) of another 20 dB you would have 105 dB. Now if you turn down the amplitude to accommodate the limitations of the CD format, you will NOT have the same impact in CD reproduction as in live performance.
Thus you have altered the dynamics of the music.
Lot of DVD movies were recorded in AC3.
However, I only buy shows on DVD that are either DTS or PCM (24 bits per your own post), which allow greater dynamics or in blu-ray.
DTS is 24 bit 96kHz formathttp://www.audioholics.com/education...of-the-formats
So obviously you are wrong again !!
Just because a speaker say it can handle 250 watt, it does not mean that ALL 250 watts is being transformed into audio output.
At that power level, the more noticeable effect is a little bit of the driver voice coil disappearing in a puff of smoke or varnish bubbling and locking the cone in place. ;-)
Driver compression often starts being significant at far lower power levels. The two most common causes are voice coil heating and nonlinear distortion.
[quote=In the low efficiency speakers significant portion goes to heat rather than audio output, thus you never get the performance that you image you are getting.
Right and this is where low efficiency drivers are more likely to get into trouble at high SPLs. Since they have to handle more power to generate a given SPL, there is a greater liklihood of voice coil heating becoming an issue.
The counterpoint is that high effeciency low frequency drivers tend to have relatively small Xmax as compared similar sized drivers of the low efficiency persuasion. High efficiency (ca. 100 dB/W) LF drivers that have more than 14 mm Xmax are relatively rare and tend to be expensive, while low efficiency drivers with > 30 mm Xmax are both commonly available and relatively inexpensive.[/QUOTE]
Thus as I stated and by your confirmation - with low efficiency speakers, by applying lots of power, in an effort to reproduce dynamic peaks will either introduce so much distortion that you have to turn them down or burn up the driver.
Thus in either case you are unable to reproduce the full dynamic peaks you have in live music. And additionally this also does not allow you to reproduce full peaks of hi-res music, making you unable to hear the benefits.
Thank you for re-affirming the point I have been making all along
xmax >30 mm common and inexpensive? You are full of it!
There are no full range speakers under $10,000 that I know of, that use drivers with xmax >30mm.
It may be available in only a few and expensive sub-woofer drivers.
Anyone can confirm this by looking at Parts Express or US Speaker sites.
But we are talking about speakers and not sub-woofers.
Most woofer drivers used in full range speakers (not subs) have xmax <15mm
High efficiency speakers have woofer drivers with a slightly lower xmax of about 10mm, which is not a problem, since as I have shown you before 105 dB speaker reaches 120 db with 30 watts, which does not bring it anywhere close to its xmax.