(19-Dec-2016, 10:35)Pim van Vliet Wrote: I haven't exactly gone from Expert to Pro but going from 200 to Od'A has definitely resulted in less sibilance. Whether that is because of going mono or because the amplification method is better I can't say. Let me try to get a grip on this my way:
Less sibilance would mean to me that the amplifier 'rounds things off' a bit. This would then automatically mean it is less transparent to the source. But the Od'A is more resolving so that theory doesn't add up. Unless you can hear more into the music because the sibilance doesn't 'cover it up' (add noise that's more prominent than the music so it takes 'centre stage')
The Od'A also sounds more natural, meaning it adds more body to instruments and voices. This again could be because of the lack of sibilance but it could also be because the 200 was struggling a bit with the C1's. The C1's need power and the 200 just didn't cut it. SAM made a difference in the lower registers but the Od'A doesn't need SAM to almost give the same powerful lows. That probably explains why people with bigger speakers, who would also have bigger amplifiers, didn't notice as much of a difference as those with smaller (lower sensitivity?) speakers.
I did set up my Od'A with the 10.something firmware at first but changed back to 9.something when I made some changes to the config. 10.whatever did sound more forward but I only used it when the amp was brand new and I haven't since so it's hard to tell if that makes a difference. But I do remember people saying 10.whatever was a bit bright when it first came out and was used on Experts only.
Has anyone tried firmware 9 on a Pro? No idea if it works but worth a try.
Having said all this; this afternoon I played a few Bruce Springsteen songs. I turned the bass up by 4 dB and the treble down by 2 dB. It's not ideal but still very enjoyable. I'm no purist; I'm an enjoyist, if there is such a word.
Sibilance is not a pattern by itself. Sibilance is musical information out of phase...or simply put it is a tone stretched to a longer time intervall (digitally that's jitter) than it is meant to be originally.
The Od'A is simply a better amp with more precision/less jitter. It doesn't round up but in contrary puts the musical signal patterns precisely together in 'Time and Space'. Everything is at its right place. Sibilance diminishes into Precision. This extremly contributes to more body and stage. It's the reason why it sounds more natural and why you perceive more dynamics. More 'In Phase Information' in a closer time intervall...simply put that's greater dynamics.
Power really is a very minor issue when you want to define the differences of each D-Model. If you would really measure the power consumption while hearing loud you would be surprised to see the values most times way below 100W often beneath 10W (depending on speaker efficiency). Remember this is dynamic power. I don't know the exact value but a D200 has a dynamic power of approximately more than 2000W I think.
I have only once driven my D200 at a volume it eventually shut off. But that was something like +5.0dB on a WA Sophia 3 (SAM off
) and performing some big China Drums from a CD. That was very loud but it wasn't apparent to us that it was too loud for the D. No distortion...nothing...it just shut off after a few minutes.Power is just a label on the model until you drive Big speakers in Big rooms or at insane volumes. It's more about how the needed power is provided inside the D...but that's the mod theme
"Oh, you can buy the other. But then it is a cost intensive learning process"
berlin
