sander99
Headphoneus Supremus
I erased the post not because it would be total BS, that was just a joke, but because there are some subtle issues with the aspect of cancelled out noise. Very general: Things like the type of cable, and whether there are balanced electronics on the other end of the cable instead of headphone drivers, etc. But that is all complicated, not at all relevant for headphones, and beyond my expertise. However, there really is no common ground [Edit: common ground is maybe a bad choice of words, I just now learned it has or can have a very different meaning, I just meant there is no common null contact for the two headphone drivers (no null contact at all)] when the A16 is in balanced mode. There are really 4 different voltages on the 4 wires (left normal, left inverted, right normal, right inverted), so you really can not join any 2 of them together You really need 4 different contacts all the way from the A16 to your headphones. (Just for completeness: I think in theory a trick with transformers could be applied such that you can transform two balanced signals over 4 wires to 2 unbalanced signals over 3 wires, but that is just more complicated and I guess it would degrade sound quality.)OK, but if we assume that the stronger signal is the main and maybe the only reason why A16 will have that balanced mode, can we please continue your expertise in the direction where maybe no changes on the side of the original cable would be needed. I mean, if we merge signals from both A and B 1/4" sockets into the third 1/4" socket (which is the part of the external adapter, together with the two 1/4" plugs on the A16 side), then we can have that stronger signal without having to replace original cable with the XLR cable or without having to cut original cable's plug and replace it with two plugs. Am I right?
And why would I want to avoid changing the original cable on my HD600? Because I have negative experience with my earlier HD589SE. I put the 'upgrade' cable and got different headphone. Not better, but worse.
Edit: I'll put back a part of what I erased from my earlier post here, and this is no BS:
Quote from https://www.kickstarter.com/project...al-3d-audio-headphone-processor/posts/1950248 :
You can conclude that also from the wiring diagram:In balanced mode an amplifier is connected to each side of the headphone transducer, one in anti-phase to the other, thereby doubling the maximum voltage difference across it for any gain setting.
https://www.kickstarter.com/project...al-3d-audio-headphone-processor/posts/1952155
In the case of the A16 the only aim is to have more power. The bridged/balanced amp is symply an amp with different properties - most important the increased power - than the individual single ended amps.
I guess the reason why Smyth offers the bridged/balanced mode is simple: there are 2 stereo headphone amplifiers on board anyway - although they had to change to 2 identical amps - and it is easy to do it so why not offer this extra option?
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