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Musiland MD11 to be released - Page 5

post #61 of 66
4/23/11 at 6:53am
dpost
Edited by svyr - 5/2/11 at 3:32am
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post #62 of 66
4/23/11 at 6:54am
I finally got a new multimeter biggrin.gif ... and a chance to measure DC offset on the Line out and HP out again.

It looks like HP out is worse.

I got 130mV and 145mV DC (pics 1-2) on the two channels respectively (0.13/5v biggrin.gif pic 3 ). As far as I'm concerned that's pretty appalling considering the AC voltage for the IEMs volume was about 600mV (Look at the tangent opamp page, he says even DIY crappy amps shouldn't have > 100mv).

This is very very very disappointing.

Measured line out again, (pic 4), and it's 70mv frown.gif (oh and yes, it's badly out of focus, but I can't be bothered retaking it, since there are a few pics of the same measurement for line out with my old fluke mm, before it died)

bleh.

250 (hp R)
250 (hp L)
250 (hp L, V instead of mV)
250 (line out)


The last pic is a baseline measurement of the DC offset on an external amp (showing about 4mV)
250

Musiland mad.gif ....
Edited by svyr - 4/23/11 at 6:56am
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post #63 of 66
4/23/11 at 5:07pm

my beloved Firestone Spitfire DAC outputs 3mV on the L and 4mV on the R...the HA-160D 0mV on the HP out.

 

your sales pitch isn't very effective anyway biggrin.gif

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post #64 of 66
5/2/11 at 3:32am
lol... I just realized that there is no digital out (coax, toslink, etc are all ins biggrin.gif )... That means I can't even use it as a transport (combined with the analog section being all fubar it's not really useful for anything it seems)...
Oh wait, it is...Now it's serving as a glorified monitor stand biggrin.gif

500
Edited by svyr - 5/2/11 at 3:38am
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post #65 of 66
5/30/11 at 6:27pm
http://www.head-fi.org/forum/thread/550811/how-much-dc-offset-would-you-consider-harmful-to-hp-and-after-which-point-would-you-throw-the-commercial-amp-out/30#post_7506714

mmm yea... So basically the DC offsets are by design and the power button issue doesn't look to be a power button issue but the bootloader or something. In other words, if you buy one of these, be prepared to get a HP and line out cable with some capacitors in line biggrin.gif
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post #66 of 66
12/29/11 at 5:37pm
Output impedance on the headphone out is too high (I somewhat suspect it's higher than the quoted 2ohms). Low impedance/high sensitivity IEMs (e.g Unique Melody Aero or Mage), sound terrible and have interaction issues (high noise floor, distorted frequency response). Even hp out 2 doesn't seem to fix it fully.

Not something I'd expect from a $300+ amp/dac. Will be buying an nwaguy o2 amp for low impedance headphones and iems.
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