- Sep 14, 2010
Guy's, i think u don't understand me :/
When the "HI-FI" toggle is off, then i press it and change to ON i hear the PAUSE (half of second), but after this, the volume and even quality don't change, but if i put the Sennheiser's (much more impedence) the situation is change dramaticaly - when i press ON of the HI-FI, again i hear the PAUSE, but after this now i can hear the diffrence very well - the volume increase much louder and quality also has improve! This is looking like when i plug the XBA-H3 the toggling ON/OFF HI-FI doesnt change enything (maybe the DAC is active, i only tell that is no changes in sound),but when I plug Sennheiser's headphones the change of toggling ON/OFF work's perfect!
I understand completely. With both of my full size headphones, which both have an impedance in the low 60's, the volume change is very significant. With all the iem's I've tried the volume change is minimal. All of my iem's are between 16 and 40 ohm. I know what you are saying. The ess dac and amp is active though. The reason there are different results with different headphones and iem's is because the amp is adaptive based on the impedance that the amp is seeing.
When you hear the "pause" when toggling hifi mode on and off that "pause" is the phone switching between the snapdragon amp/dac and the ess amp/dac. There is no question about that.