I always pictured the E series to be more for mobile audio and for listening to music/movies than for gaming. But then again, they do advertise, with the E3 especially, the "Scout Mode" which is only useful for gaming. Which could be a reason why they took it out for the E5 even though it's really just a software thing. But that is just my wild speculation.
Does any other portable DAC/AMP system support 5.1 or 7.1? I really don't know so I'm asking. Like the ASUS Xonar for example. Seems that a lot of people are going to be comparing the E5 with the Xonar.
Nothing about the E5 is mobile.
Their lineup is a joke. The E3 has a huge amount of hiss and you can't control volume in small enough increments. It's either loud or silent with IEMs.
The lineup that is made specifically for headphones doesn't support 5.1 or 7.1 virtual surround sound which is ridiculous.
Use Razer Virtual surround sound. It's free and doesn't require any specific hardware to be attached. Can be used with a USB DAC as well.
I don't think those were ever advertised as N.1 surround system, did they?
With a single (dual, but still single) headphone output, that would be a problem to achieve.
The CL SBX technology creates a 3D sound, with normal 2 way output.
SBX Pro Studio Virtual Surround Sound uses software to simulate how a human head would hear a speaker system. It can take any number of channels whether that is 2.1, 5.1 or 7.1 and will output binuaral audio which is stereo. That is how you can hear things in front, to the sides and behind you.
However, with E the lineup you will only hear the front speakers because the E1,3,5 only appears as stereo to Windows. Even though the software is capable of 5.1 and 7.1 surround sound you won't get it because the DAC only appears as Stereo to Windows.
There is X-Fi MB3 which is purely software but that has it's own problems. Razer Virtual surround sound software appears as a virtual playback device in Windows and shows it self as 7.1 speaker system. It then sends the virtual surround sound processed stereo audio to another playback device e.g. a USB DAC or your onboard soundcard. My USB DAC is stereo only but I Razer VSS will still send the VSS processed audio to it because VSS processed audio is stereo. Headphones are stereo with one channel for each ear.
X-Fi MB3 is the same as Razer VSS. A virtual playback device that just processes a 5.1 or 7.1 channel audio and outputs stereo to headphones. However, if the playback device that X-Fi MB3 outputs audio to, such as a USB DAC, only shows itself as Stereo to Windows then X-Fi MB3 will only show itself as Stereo to Windows. Therefore, stopping you from using Virtual surround sound.