What you might be hearing the noise floor of the amp. The the T1's have an impedance of 600 ohms while the HD800's have an impedance of 300 ohms. Therefore it's easier for noise to come through the HD800 than the T1.
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I would tend to agree with you Shahrose.
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@Priyajeet.: what were the transport and DAC you were using when you heard the hiss with the V100/800s?
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Well, I have only recently started to get serious about HeadFi, my first setup is my portable unit, A Graham Slee Voyager, 5th Gen. iPod with all losless files & the ATH M50 headphones, a really nice setup that I am very happy with.
I am now going to start putting a more permanent system together. I will probably go for the Graham Slee ultra linear as I like Grahams engineering, and think the T1 would be great for my music tastes, Blues, Rock and quite a lot of singer / songwriter material. So how do you think the Ultra linear would be with the T1 ?
Thanks
When I have absolute no music playing, the T1s are dead silent no matter how high I crank up the volume, while the HD800s have this very faint 'airy' noise which increases when cranking up the volume.
Sometimes the headphone cable can cause some microphonic noise. The better the cable, the less microphonic noise you hear. Ideally, when no music playing, the headphones shall be dead silent (as you described with the T1 above).
Sometimes the headphone cable can cause some microphonic noise. The better the cable, the less microphonic noise you hear. Ideally, when no music playing, the headphones shall be dead silent (as you described with the T1 above).
Generally, the extent to which a cable is prone to microphonics has little to do with its overall sound quality. That is, a "better" cable is not inherently less microphonic. Some otherwise excellent sounding cables exhibit annoying microphonics. And it would be fairly easy to build a non-microphonic cable that sounded horrible.
Microphonics of a headphone cable is mostly due to the cable maker's choice of outer covering (e.g. monofilament Techflex, which is particularly susceptible to microphonics) and the way the cable is physically anchored to the earcups and/or drivers. The T1's cable is non-microphonic primarily because Beyerdynamic chose a very soft outer material and did not to cover it with a braided sleeve.
A hiss is not an indication of cable microphonics. It's most likely an issue with the source electronics. (In the case of a tube amp, the tubes could be microphonic.) Hearing a hiss on one headphone but not another when driven by the same amp is probably due to impedance and sensitivity differences between the headphone drivers.
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