iFi audio hip-dac: Tech Note #4
The S-Balanced Solution
(As found in xCAN, xDSD and nano iDSD BL)
No second amplifier is used, neither are extra signal, noise, nor distortion added - perfect for sensitive IEMs. Further including the iEMatch technology extends compatibility with ultra-sensitive IEMs. A dedicated negative wire per channel all the way to each channel ’s amplifier ’s star-ground makes sure there is no crosstalk between the channels.
Plugging in unbalanced headphones with a TRS connector instead of TRRS will cause zero issues and, in fact, will still cut crosstalk by 50%, compared to using a TRS socket.
S-Balanced output works on TRS & TRRS headphones
It is fully compatible with and supports balanced wired headphones on TRRS 3.5mm and the Chinese 3.5PRO balanced wiring standard maintaining the channel separation. That is, after all, the point of S-Balanced.
It can also use 3.5mm TRS connections without problems.
‘S-Balanced ’ is short for ‘Single-Ended Compatible Balanced’
https://www.head-fi.org/threads/some-common-headphones-plug-wiring-for- balanced-audio.875730/
We are compatible with Hifiman/LHLabs/3.5PRO/OPPO PM3 in the above on 3.5mm S-Balanced.
Balanced wiring delivers the full benefits with lower noise and distortion (and lower output) than other balanced circuitry and is transparently compatible with TRS unbalanced headphones and headphones with microphones making sure neither Amp nor Headphone can be damaged.
Which is why ‘S-Balanced ’ is so awesome and could only be invented by a Nicola Tesla level genius.
- Compatible with A&K/FiiO on 2.5mm Balanced
- Compatible with any 2.5mm Balanced equipped product compatible with A&K/FiiO
The key to the S-Balanced advantage is to understand the following:
- A balanced output includes two separate amplifiers
- All else being equal, two amplifiers contribute both noise and distortion
- Due the laws underpinning this, the output noise of the two balanced amplifiers MUST be at least 3dB greater (1.4 times) than that of the single amplifier
- The odd order (unpleasant or disharmonic) distortion of the two amplifiers for the same level on each amplifier summed will also be at least 3dB greater than the single amplifier.
With S-Balanced and XBass, we have pretty much game-changing tech. All the benefits of balanced, with none of the drawbacks.
XBass
XBass is there for open-back headphones or just those tracks that ‘miss that bit of bass’. By now, customers are familiar with the Analogue Signal Processing circuit that was developed in-house for our own use.
Premium audiophile parts
TDK high stability C0G surface mounted capacitors - C0G dielectric close to Teflon in key areas that affect the smoothest sonics.
As you can see, the hip-dac really is one of those products that looks spectacular on the outside, and sounds absolutely wonderful because of what it is inside.