Originally Posted by Larry L
Originally Posted by arnyk
The 8060ST is a very interesting speaker. I don't particularly like it because it seems to me to be less than what it is sold as, and less than what people who buy it seem to perceive it to be.
The two 4 1/2 speakers are really pretty wimpy as bass drivers, and no way can they be candidates for "large" settings:
Freq,Hz Max SPL, DB
The traditional 80 Hz setting is an absolute and total low water mark for a average In a high quality system, the recommended crossover setting would be more like 120-130 Hz.
Now, lets look at the 10" subwoofer:
Freq,Hz Max SPL, DB
As medium-performance subwoofers, I'd rate them for operation down to 50-60 Hz.
For your approx $2K investment I'm not dancing in the street. Your recovery position would be a subwoofer from SVS, Hsu, etc in the $1k-2K range possibly as your third sub.
I am wondering where tese numbers come from. Are these from an independant lab, the manufacture, home measurements, or where?
They are based on a mathematical model that estimates speaker SPL versus frequency for low distortion. The model is based on accepted loudspeaker theory and the particular one is due to Sigfried Linkwitz. The parameters for the model are developed by taking the most optimistic reasonable view of the parameters for the loudspeaker being analyzed because actual data is unfortunately generally given.
What is the tes set up?
A mathematical model.
Was this using the LFE input of the UUT or using the speaker wire input?
The model ignores any practical differences between those options. It presumes that the best way for that particular speaker was used by ignoring any potential losses.
Was the input signal direct to the speaker system or through another component?
It is presumed that the speaker is connected directly to amplifier, or effectively so.
What was the amplitude of the input signal(s)?
Whatever it takes to achieve the given results. That information is also estimated by the model (an Excel spread sheet) but I generally don't provide it because it requires even more assumptions.
What is meant by "Max SPL, DB"? dos thiis mean the input was increased as the frequency was changed to measure the maximum possible output of the system?
The maximum undistorted acoustical SPL that a speaker can generate is limited by diaphragm area and Xmax.
What was the room?
A room that neither helps nor hurts the performance of the speaker is presumed by simply not including any possible room effects in the model.
The model is only consistent with itself. The intent is that it should be used as a guide. In many cases it shows that it is impossible for the given driver configuration, presuming SOTA drivers which are of course rarely used, to produce enough bass to be satisfying in a neutral room. I''ve checked the model against real world speakers on occasion, and it showed the same general shape of data as the real world speaker, but as promised the computer model significantly overstated what the speaker actually did.