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Originally Posted by The-One
i was on Xin's forum for the super macros and there it said in a later version V8, it'll have two amps together in one package as a pre power combo set up, but you can also do it now with two separate amps.
my question is, what is it exactly and how does it improve the sound? And is 2 amps combo together excessive for IEMs?
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There are two amplification stages in most headphone amplifiers. There is a voltage gain stage, which Xin calls the preamplifier stage, where the amplitude of the original signal is increased to a level large enough to produce adequate sound from the headphone, and the current output stage which Xin calls the amplifier stage, where the current required to physically move the headphone driver is provided. In most headphone amplifiers, these are powered by a single power supply, in essence allowing the potential for one to interfere with the supply to the other. By using two amplifiers with only one of the stages in each, you are completely seperating the signal and power supply paths to reduce any possible interference to a minimum.
That's the theory. The fact that it isn't done even in the most expensive headphone amplifiers tells you something. It may or may not make a difference, however there are better ways to improve your sound for double the money in headphone amplification.
