Originally Posted by Oregonian
I have done basically DOE's (design of experiments for those who don't know what I'm saying) on the best setup for my double amping combinations, and trust me, how I have it running sounds the best. Yes, ZO maxed out, on High gain (forgot to mention that in my earlier post) and with E-11 controlling the volume. There is no bloated bass here - NONE. The key really was using LOD as the connection to source, and then fine tuning with equalization, which again was one of the key 'quality adders'.
Maybe with ZO by itself your settings would apply...............but not with the setup I laid out.
Wish y'all could experience what I am describing.
OK then it probably means ZO simply works better at higher levels of bass boost when double amped compared to without double amping. It does make a lot of sense here, very much so and here is why:
Let's take for example XB500 and Q40 that I've got and used both for a while.
- XB500 is VERY sensitive, easily driven headphone that goes really loud
- Q40 is not overly sensitive and is 64 ohm for starters.
- XB500 responds to the bass boost much more than Q40 continues to sound noticably bassier the higher you go
- Q40 stops sounding noteworthy bassier somewhere midways and starts to sound less controlled and tight after that
- The very low frequencies consume a lot more power, ZO's bass boost curves goes only deeper and deeper the higher you go => the power requirement becomes much more higher
- XB500 because it's a sensitive, easy driven headphones doesn't need as much power for the bass and therefore it continues to easily respond to the bass boost (my point here is obviously the more sensitive / easier driven the headphone the better it will probably respond to ZO's bass boost)
- ZO2.1 has at least a bit higher gain than ZO2.3, ZO2.1 is said to be 2x amp staging, preamp + amp, I'm not sure what was the case with ZO2.3 which is actually based on ZO1 config, ZO2.1 was a more experimental config so it may even have a better amping config besides higher gain (at the expense of unability to use with IEMs and sensitive headphones due to hissing and not possible to use LOD)
- ZO2.1 provides stronger bass than ZO2.3
- A lot of people are having good results with double amping
All these statements is a sign of that it indeed could use some better amping to keep the bass boost more controlled and refined at the higher levels.
So probably when double amping it will sound fine at the higher settings too which may not sound great if you only used ZO. digiZoid at one point was also concidering putting out a high-power amp "buffer" that can be used both with ZO and otherwise as a normal amp (probably they are well aware that ZO probably doesn't quite have the ideal power delivery on its own). I hope the future ZO3 will have better amping or at minimum ZO2.1 levels.
Edited by RPGWiZaRD - 2/7/13 at 7:27am