To db loudness that is being said. . When we listen to music especially at moderate volumes. There are transients above 120 db. They may be very short in duration for the instruments being used to measur them. An example of this is a piano . Did you ever notice that no matter how good our dac,s or headphones are a piano just does not sound natural. Well most dac manufactories know this and that ones that do not admit are just lieing. Anyway the reason is two parts first the dac and next the equipment . The amps are more than fact and powerful enough, but the speakers or headphones are not. One reason is the dynamic range of the piano . When a single key is struck it's above 120 db and this is one key imagine what's needed during playing. Another reason for the headphones to sound correct is the overall power reserve needed to accomplish good sound tone with these headphones. They need plenty of reserve, this is obvious with the FW amps we tested. The amps were extremely clear and detailed but made the headphones have not just a bright sound but also changed the sound tone as well. So it's complicated and it's not just one spec we need but havering about 80 watts to start is a really good start . Now some here use the F5 and I intend to buy one as if it can deliver the fastness and details of the j2/f3 and the power of the krell wow what an amp to have.
One more thing to muddy things up a bit , but it is something we all should know. The volume controls in our dacs are mostly robbing us of details and sonics . And most here have no idea it even happens. We are far better off useing an analog volume pot Ina preamp . The reason is complicated but does exist and over all a closer gain Match is needed from dac to amp , meaning the more we need to turn the volume up to hear the music the better we are. Now own reason audio gd is a sounding good is he uses an expensive resister network with relays to accomplish this task.
Edited by ALRAINBOW - 3/4/14 at 2:42am