klipschman70
Active Member
Picked up my silver MDAC this morning from NA distributor and when I connected it to my system, I realized only one channel is working. Anybody experienced this before or do I have a bad unit ?
Picked up my silver MDAC this morning from NA distributor and when I connected it to my system, I realized only one channel is working. Anybody experienced this before or do I have a bad unit ?
Thanks
I will give it a try tomorrow morning. Anyhow, which channel did not work in your case? mine is the right channel.
Picked up my silver MDAC this morning from NA distributor and when I connected it to my system, I realized only one channel is working. Anybody experienced this before or do I have a bad unit ?
Hi klipschman70,
After you have had to wait for such a long time, I'm extremely sorry to hear of your issue.
It does sound like a case of a stuck Mute relay - you could try cycling the relays by inserting and withdrawing headphones.
I can only hope after your long wait that your dealer has a spare replacement unit.
I've got an M-DAC winging its way to me later this week.
I'm primarily interested in using it as a high quality DAC and headphone amplifier with my laptop and HiFiMan HE-500, but I will also be trying it in my main rig where it will be up against my Young DAC / SQ-PSU.
I will also try using it in place of my pre-amp (Classé DR-6 MKII) to feed my Classé DR-10 power amplifier directly. (Although this is not a viable long term option as I have an analogue source too)
Pictures / report to follow
Lefty
In the meantime I have tried to plug in and out headphone jack without any success. The other thing is, the MDAC seems to work properly both channel on headphone jack. However only one channel working from either RCA/ balance output.
When I used headphone jack with MDAC and stream 24/192k file from Oppo BDP-93. Only the first song title would play. On the second song, MDAC only showing 192.001k (the first song it showed 24bit /192.001k)
The HE-500 sounds pretty good out the M-DAC but they won't reach their full potential. They need more current and voltage swing.
Hi klipschman70,
This clearly points to a faulty Mute relay on your Right channel (the Right Channel works though the headphones).
The Oppo BDP-93 issue has been report here before - We have no idea of the cause - however we can work with your directly with diagnostics software to resolve the issue - Pls. PM your Email address and Dominik will communicate with your directly to pinpoint and resolve the issue.
Sorry for your issues, the Oppo locking issue can be resolved with a software update - the however you will need the unit exchanged for the relay issue.
John
John
Thanks for the clarification. Fortunately my NA distributor has a spare unit for me. I will exchange my faulty one with the new one tomorrow. Hopefully I don't have this issue with the new one.
BTW, I have sent you PM with my email address.
Regards
Harry
Let it run in for a few days. I found the volume control and ability to remove my old preamp to be a great benefit.
How much current and voltage swing do they need? The MDAC's Class A CROSS output stage is pretty beefy...
I think I may have asked this before but forget the answer, what are the specs for the headphone amp?How much current and voltage swing do they need? The MDAC's Class A CROSS output stage is pretty beefy...
John reported:
"The Headphone outputs are the same quality as the Mainoutputs.
THD 0.0015%
SNR-A 117dB
Output impedance lessthen 1 Ohm
Output current limited to +/- 120mA (Before current limit starts to kickin)"
Which should be more than adequate for the vast majority of headphones