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Author Topic: COMPREHENSIVE IN-DEPTH REVIEW: Schiit Mjolnir Review  (Read 10322 times)

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olor1n

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Re: COMPREHENSIVE IN-DEPTH REVIEW: Schiit Mjolnir Review
« Reply #20 on: September 06, 2012, 08:43:11 AM »

That was me. I sent my first Mjolnir back to Schiit. The diagnoses here of a potential DC offset issue prompted me to take Jason up on a full refund.

I ended up paying the higher asking price for a second Mjolnir from Schiit's Australian distributor. I've had it a week and was initially convinced the popping and crackle had gone with the first unit. Nope. Still there.

So two possibilities. The noise is symptomatic of "dirty power" (though other amps I've owned haven't exhibited this problem), or I've received another unit (from the same batch as the first) with the same fault.

Not sure what to do now. I think I need to invest in a DMM and see if can isolate this issue. I'm a huge noob in this area. Hopefully you guys can advise.


edit: other than that, I agree with purrin's incredibly succinct assessment. This amp should be added to the prestigious Pirate's Booty list.

Ouch, that really sucks. I've had a Parasound hum from a ground loop which I've solved by floating it, and I had powered monitors buzz and pop from GSM radio signals which I solved by using well shielded AC cords, but that's been it. Even my KGSSHV was plugged straight into the wall with an unshielded cord and it was fine.

Any chance you can borrow something like a balanced isolation transformer? If the problem makes it through that I would be very surprised.

Is this the sort of thing you're referring to? Is there an easier way to test for DC offset? Could I just get an el-cheapo DMM and probe the Mjolnir's balanced output? Like I said, I'm a freakin noob. Pardon my ignorance.
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JMcMasterJ

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Re: COMPREHENSIVE IN-DEPTH REVIEW: Schiit Mjolnir Review
« Reply #21 on: September 14, 2012, 09:45:21 PM »

It wasn't just the pads. there are a few r2's out there which were really good. I know the current r2 are very good and also very consistent. They finally got it nailed down pat. Are your r2's still under warranty?

Jason told me at the meet that the pair at his table was a r1. Anyway, I thought the amp sounded great with the LCD2 but less so with the HD800. I wonder if his specific pair had something to do with it.
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Marvey

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Re: COMPREHENSIVE IN-DEPTH REVIEW: Schiit Mjolnir Review
« Reply #22 on: September 14, 2012, 09:54:02 PM »

Jason's HD800 was seriously messed up at that time:  http://www.changstar.com/index.php/topic,488.msg8955.html#msg8955
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schiit

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Re: COMPREHENSIVE IN-DEPTH REVIEW: Schiit Mjolnir Review
« Reply #23 on: September 14, 2012, 09:55:40 PM »

That was me. I sent my first Mjolnir back to Schiit. The diagnoses here of a potential DC offset issue prompted me to take Jason up on a full refund.

I ended up paying the higher asking price for a second Mjolnir from Schiit's Australian distributor. I've had it a week and was initially convinced the popping and crackle had gone with the first unit. Nope. Still there.

So two possibilities. The noise is symptomatic of "dirty power" (though other amps I've owned haven't exhibited this problem), or I've received another unit (from the same batch as the first) with the same fault.

Not sure what to do now. I think I need to invest in a DMM and see if can isolate this issue. I'm a huge noob in this area. Hopefully you guys can advise.


edit: other than that, I agree with purrin's incredibly succinct assessment. This amp should be added to the prestigious Pirate's Booty list.

Ouch, that really sucks. I've had a Parasound hum from a ground loop which I've solved by floating it, and I had powered monitors buzz and pop from GSM radio signals which I solved by using well shielded AC cords, but that's been it. Even my KGSSHV was plugged straight into the wall with an unshielded cord and it was fine.

Any chance you can borrow something like a balanced isolation transformer? If the problem makes it through that I would be very surprised.

Is this the sort of thing you're referring to? Is there an easier way to test for DC offset? Could I just get an el-cheapo DMM and probe the Mjolnir's balanced output? Like I said, I'm a freakin noob. Pardon my ignorance.

It's the AC power. Out of the 200-ish Mjolnirs shipped so far, we've had one other complaint of random ticks and pops that were resolved with a hospital-grade Tripplite isolation transformer.
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Lots o Schiit around here.

schiit

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Re: COMPREHENSIVE IN-DEPTH REVIEW: Schiit Mjolnir Review
« Reply #24 on: September 14, 2012, 09:57:39 PM »

Jason's HD800 was seriously messed up at that time:  http://www.changstar.com/index.php/topic,488.msg8955.html#msg8955

And I'm really, really, really looking forward to hearing them again soon. I hear they're going to me coming back my way shortly.

(And I need their resolution for some tweaking...)
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Lots o Schiit around here.
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