Storm, you should try plugging in at a different location to absolutely narrow down what's the cause.
Recent Images In This Thread
Related Forum Threads
- I'm Trying To Decide On Best Setup For My Budget(4k) And Taste. Which would you buy? Last post on 8/23/14 at 5:17pm in Introductions, Help and Recommendations
- <$600 AMP/DAC for the Sennheiser HD800's Last post on 12/5/12 at 11:59am in Headphone Amps (full-size)
- Audeze LCD-3 and $1K amp or Audeze LCD-2 and $2K, where is the sweet spot? Last post on 8/11/14 at 1:08pm in High-end Audio Forum
- Need Help Choosing Headphones/Amp/DAC/Cables Last post on 7/11/12 at 2:39am in Headphones (full-size)
- Apex Peak/Volcano vs. Zana Deux Last post on 6/25/12 at 1:54am in Headphone Amps (full-size)
Head-Fi Buying Guide (Ultra-High-End Headphones (Summit-Fi))
Last edited: 12/4/15
- Head-Fi Buying Guide (Over-Ear Headphones)Last edited: 1/18/16
- Diy Beginners GuideLast edited: 7/22/13
- Headphone ImpedanceLast edited: 8/18/12
Bought these after receiving the Massdrop HE-350s which were just too treble-forward for my taste. I listen to a lot of music when at work. Desk space is limited, so I can't justify running an...
When i first got the Cayin iHA-6 and iDAC-6 combo and paired it with my HD800S, i wasn't too thrilled. Compared to my previous HDVD800, there was more detail present from the dac, but it came with...
For larger views of the photos (1200 x 800) - please click on the individual images INTRODUCTION I can remember when I first joined Head-Fi, I started with some pretty cheap gear, and I...
At the time this review was written, the TFZ Series 3 was listed for sale on Penon Audio’s website. Here is a link to their listing of the...
Background: I own Sennheiser HD600 and Fiio X3II. I love HD600 because it is comfortable and also works well for my classical music and vocal music. But it doesn't play well with any pop music...
Schiit Mjolnir headphone amplifier - Page 190post #2836 of 35259/28/13 at 7:11pm
Gear mentioned in this thread:post #2837 of 35259/29/13 at 3:19ampost #2838 of 35259/29/13 at 3:49pm
Some more experiments:
I plugged the Mjolnir into the regenerator and it hummed. I then disconnected the regenerator from the wall (pulled the plug) so that it was functioning as a battery back-up UPS - and the Mjolnir still hummed. That means that either my problems are the Mjolnir itself, radiated EMI from somewhere, or the regenerator is putting out the same kind of AC problems that I'm getting from the wall. Note that this regenerator has always been 100% consistent in the past but also 100% mediocre in terms of sound quality, so it's not inconceivable that the power it supplies is flawed in some way (in fact I know it is as the treble is a little rough and the midband lacks finesse when the whole system is plugged into it). The probability that it's also causing the Mjolnir to hum in the same way as the regular mains supply is the question.
I took the Mjolnir upstairs and plugged it into a socket in the bedroom, which is the quietest room in the house and on a different circuit. It hummed as before. I'm beginning to think it's just a noisy unit, but I'm sure it wasn't always this way. I'm in the UK with a 230v version. It would be interesting to note which versions other people have and whether they're noisy or not.
Having removed the Mjolnir from my system to experiment with it, I hooked up some old speaker amps to power my headphones. These are 20 year old monsters with big toroidals and in desperate need of a service. I can't use them to drive speakers due to the thinness of an adjoining wall with the neighbours, so they've been in storage for a while. They work fine with the volume set to -60db apart from an audible hiss through the headphones. Having set them up one of them hums with the same intensity as the Mjolnir (perhaps a bit louder), whilst the other is dead silent. They're both plugged into the same DC blocker/filter combo.
NB: By hum I'm talking about mechanical noise emitted by the Mjolnir, which is audible from up to ten feet away in a quiet room (not through the headphones) and annoying within six feet. It's higher pitched than a thrum, and lower pitched than a whine, if that helps :-)post #2839 of 35259/30/13 at 5:59am
Just a thought. You may have already did this - not sure. Try taking it to work or a friends house or somewhere other than your house. Best place would be an audio shop where other amps are being used with no hum.post #2840 of 35259/30/13 at 1:42pm
I've not tried it with the Mjolnir yet, but it's a good idea. I did try that with a Lehmann BCL I borrowed, which hummed like a bastard here but was silent at the shop. Trouble is, that was before I got the Syncro so it may have been caused by DC offset in that case so not comparable. It was so loud I didn't even bother to listen to it and just took it immediately back to the store.post #2841 of 352510/3/13 at 2:49pm
Made a discovery that I should have tried some time ago. As the Mjolnir is on the end of the P3 I can adjust the voltage feeding it up and down in 1v increments with the P3's remote control. At 230v - 240v the hum is similarly bad, and it's still bad below 230v, but by the time I hit 222v - 220v it is significantly diminished. Unfortunately my local UK voltage is 240v - 250v so the P3 is operating way outside its recommended comfort zone outputting 220v. The hum doesn't completely disappear at 220v but it's about half as loud (by my completely non-scientific calculations ) and much less annoying. The lowest voltage the UK P3 can do is 214v, which is slightly quieter still.
The DAC and source use switched-mode psus and don't care what the voltage is, so I'll leave it like this for the moment and hope nothing explodes!post #2842 of 352510/6/13 at 4:49pmpost #2843 of 352510/6/13 at 5:43pmpost #2844 of 352510/6/13 at 8:48pmpost #2845 of 352510/7/13 at 1:40am
I use mine with the HD800 and it's lovely after midnight, super smooth and transparent. It does lack a little low-end grunt, but I'm used to small speakers so it sounds pretty normal to me. The only issues I have are when the mains supply is noisy as some brightness and aggression creeps in, but that's true with all my amps to some extent. Edit - some of that aggression comes from further up the chain with other devices being affected by the noise as well. I'm having a really hard time getting my mains supply consistently good.
I've been running on 220v since my last post, with the Mjolnir on continuously, and if anything it's got quieter. I can't hear anything from more than a foot away now, which is how it should be. I just wish it did that at 240v.
Edited by Stormfriend - 10/7/13 at 1:43ampost #2846 of 352510/7/13 at 9:09ampost #2847 of 352510/7/13 at 9:23ampost #2848 of 352510/10/13 at 9:40am
I have not been following the Mjolnir closely since I bought one shortly after Schiit released it. In reading some other threads, I have seen references to an "old" and "new" Mjolnir, suggesting the latest production versions are improved upon the originals. Could someone please explain to me what changes, if any, Schiit has made to the Mjolnir since its initial release, or how these changes affect sound quality? I would greatly appreciate it.post #2849 of 352510/10/13 at 12:03pmQuote:Originally Posted by JeffA
I have not been following the Mjolnir closely since I bought one shortly after Schiit released it. In reading some other threads, I have seen references to an "old" and "new" Mjolnir, suggesting the latest production versions are improved upon the originals. Could someone please explain to me what changes, if any, Schiit has made to the Mjolnir since its initial release, or how these changes affect sound quality? I would greatly appreciate it.
To the best of my knowledge there have not been any changes.post #2850 of 352510/12/13 at 5:23pm
So on a whim I brought in the Gungnir and Mjolnir stack to see if I could free up some desk space without too much drop and... interesting results.
First things first. This was not a fair fight. $1600 v $7000 MSRP but this is Head-Fi so what the hell. Secondly the Schiit stack is awesome given it's price tag and maybe more importantly really synergize with each other, cancelling out each other's potential faults.
So if we assume the GS-X mk2 and PWD2 are neutral, humour me :P Then the Mjolnir is tilted up tonally and the Gungnir is tilted down. Ie the PWD2 and Mjolnir is a little too forward and illuminated and the Gungnir paired with the GS-X mk2 a little too laid back and dark.
But the Gungnir and Mjolnir really mesh well. Since both "stacks" played best as a unit what do I think you give up for opting to keep several thousands in the bank? Resolution and speed. The GS-X mk2/PWD2 combo does a better job of digging deep into the recording and almost slowing things down during busy passages where the Mjolnir/Gungnir combo is turning towards hard times. But it's the last 10% type difference, not a lopsided blowout.
So I can honestly now say my previous experience with the Mjolnir was in a large part the fault of the W4S DAC-2. But partnered with a warm dac it really is something else. Great dynamic swing and sense of air.
The Gungnir was also incredible and could bring life to a lot of the amps in the sub $1000 range that are often dried out and lacking down low. I would however avoid pairing it to overly warm sources or you could fall into dark territory. Headphone choice obviously plays a part here.
Should add. Kudos to Schiit for having the balls to crank class A bias to reasonable levels. Loves me some hot Schiit. The Mjolnir gets quite hot. Even the Gungnir is warm to the touch. Love it!
Always drove me nuts that Burson had a massive heatsink for a case and set the bias to levels that barely warm the case sigh.
Edited by Solude - 10/12/13 at 5:34pm
- Schiit Mjolnir headphone amplifier
Gear mentioned in this thread:
- Head-Fi Buying Guide (Over-Ear Headphones)
- › Sony MDR-100ABN h.ear on wireless impressions thread 24 seconds ago
- › Home-Made IEMs 1 minute ago
- › FIIL Diva PRO Appreciation and Discussion Thread - Premium Headsets... 2 minutes ago
- › The (new) HD800 Impressions Thread 2 minutes ago
- › Turn Your Detachable Cable Headphones into HiFi Bluetooth... 2 minutes ago
- › Benjie S5 Offical Thread 3 minutes ago
- › JH Audio & Astell&Kern Siren Series Full Metal Jacket Line Announced! 3 minutes ago
- › Chinese / Asian Brand Info Thread (Portable Headphones and IEMs) 3 minutes ago
- › The Hardest hitting Headphones are.. ( "The EXTREME BASS Club") 7 minutes ago
- › Chord Mojo - The Official Thread .☆*¨*★. Please READ the 3rd... 7 minutes ago
- › Philips SHP9500 by MaximumEnnui
- › Cayin iDAC-6 by EvenR
- › Sennheiser HD 800 S by Brooko
- › The Fragrant Zither (TFZ) Series 3 Hifi Earphones by Hisoundfi
- › Bowers & Wilkins P3 by foobar2015
- › "PETEREK (Verbessen)" by Hawaiibadboy
- › FiiO AM2 - Medium Power Amplifier Module for X7 by howdy
- › DiDiT DAC212 by Runningwater
- › Soundaware Esther by FUYU
- › Edifier R1700BT Bluetooth Bookshelf Speakers - Active Near-field... by ryanjsoo
- › Flawless Album Suggestions
- › The Audiophile Scene in a Third World Country...
- › Mad Lust Envy's Headphone Gaming Guide,...
- › Mad Lust Envy's Headphone Gaming Guide,...
- › Mad Lust Envy's Headphone Gaming Guide:...
- › Chord Mojo FAQ
- › Head-Fi Logo Gear
- › All about iPod Touch 6G as digital transport
- › List of major HiFiMan HE1000 reviews,...
- › Can I change my user name? Can I delete my...