Originally Posted by AV Science Sales 5
Just to clarify for those that did not read the thread. The two High sensitivity speakers in the referenced thread were JTR T12's and Seaton Sound Catalysts. These two speakers are designed to be crossed to subs in the 60hz to 80hz range. They were run full range 2-channel, no subs and were compared with traditional 2-channel speakers.
Incorrect. The Seaton Catlaysts had the bottoms "dropped out" and were tuned to 20hz. They had some serious
low end capabilities. Also, the designer of the JTR's told me to not bother crossing them to subwoofers. All manufacturers that attended were aware we'd be running full range. I'm very appreciative that they attended, but lets not pretend we intentionally gave them an unfair advantage, because we didn't. Later that day we tried to connect the JTR's to the 2-channel preamp with subwoofers, and they were 12dB more sensitive than the GTG host's LMS5400 Ultra subwoofers. Since 2-channel preamps don't typically have level adjustments like receivers do, it made using the JTR's for a dedicated 2.2 channels setup completely impossible with those subwoofers and most traditional 2 or 2.1 channel music preamps. By the way, I intentionally left out which brands they were, as to not start a pi$$ing match. At least I can say you started it instead of me.
Since the topic of reference levels always seems to conincide with high-efficient/high-sensitive designs, here is what Floyd Toole says in his book regarding reference levels...He said (page 513, chapter 22):"In rooms about 4000 cubic feet and under, well-designed conventional cone-dome loudspeakers should have no trouble achieving the required sound levels. In larger rooms, one must be more selective because some loudspeakers may exhibit distress or transducer failure. However, there are also some highly refined designs that can deliver substantial amounts of sound."
He then goes on to say:"In very large rooms and in rooms where the customer feels a need for high sound levels much of the time, horn-loaded speakers are recommended."
Regarding reference levels he states this:"With large woofers and compression-driver horns, the low distortion and an absence of power compression can lead to volume settings that put one's hearing at risk and it still does not sound loud."
Toole also states that most people find reference levels "to be a bit loud - in both cinemas and their homes."
Anyway, it's just something to think about.