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Schiit Magni Headphone Amplifier - Page 120

post #1786 of 2040
Quote:
Originally Posted by MinedSafe View Post

Headphone amp is not powerful enought for my 880 250 im affarid. Will keep on looking smily_headphones1.gif

What? It should be more than powerful enough for that headphone, that is if you have a "standard" redbook source.


Edited by xnor - 8/23/13 at 12:07pm
post #1787 of 2040
15mW into 300ohms
post #1788 of 2040

What about leckerton uha-4? It works with otg and has a quality dac and amp.

 

Quote:

Originally Posted by MinedSafe View Post

Headphone amp is not powerful enought for my 880 250 im affarid. Will keep on looking smily_headphones1.gif

What? It should be more than powerful enough for that headphone, that is if you have a "standard" redbook source.

 

15mW into 300ohms (for the UHA-4)

 

versus

 

260mW into 300 Ohms for the Magni...17x the power might just matter; it certainly provides scalability for future headphone purchases!

post #1789 of 2040
Exactly smily_headphones1.gif
post #1790 of 2040

Hey peeps,

 

I've been using my Magni at work (iMac 3.4 corei7 > Modi > Magni > Senn Momentum) for about 3 weeks now and it's DRAMATICALLY changed my attitude about being (relatively) early to my office lol

 

Freaking wonderful gear!

 

Anyhoo, just wanted to share a resolution to an issue that arose during my first week (or so) with the Magni. I noticed some scratching in the VOL movements, as well as some seemingly RF static/hum at certain areas of the VOL range (especially 7-11 o'clock - which is my preferred listening lvl). The Frequency hum did not increase or decrease with volume levels appropriately, so I inferred from that there may be a grounding issue or machine signal transferrence going on. It was barely audible, and when music was playing I hardly noticed it, but it was definitely not optimal so eventually I decided to contact Schiit about the issue.

 

Jason responded as promptly as anyone could bounce back an email (as expected, really - their reputation precedes them! no pressure...) Here's the 'official' interaction if anyone's interested (hope he doesn't mind):

 

Warning: Spoiler! (Click to show)

 

me

 

Quote:
Heya :)
 
I recently purchased the Magni / Modi combo as my first true audio stack solution (@ work running out of an iMac via USB - driving Senn Momentums) and I'm in love! In fact, I'm going to be building a home listening rig and more than likely running some Schiit products there as well (but that's a different email...)
 
I'm not sure what to make of this issue : at times I can hear what seems like static (radio? dunno...) between the 8 and 11 "o'clock" positions on the VOL pot. This is sadly the exact range at which I listen. When I move the VOL higher or lower in the "o'clock" (i.e. pre-8 / post-11 ish) range, it seems to be silent. Also, the 'interference' does not get higher or lower based on VOL pot movement, so it seems like machine noise but I can't be certain. I'm wondering if I have a defective unit - a grounding loop issue perhaps? Or is this the norm?
 
I tried to research the issue online and found some similar issues on Head-Fi, but I still can't figure out a definitive answer.
 
Anyhoo, thanks for your time and your brilliant audio solutions - can't wait to watch your company thrive ;)

 

Jason

 

Quote:
It could be ground noise from the machine, or RF interference. Have you tried it on a different computer, or is there a cellphone or WiFi router nearby?
All the best,
 
Jason Stoddard
 
Co-Founder
Schiit Audio

 

me (responding)

 

Quote:
Probably all of the above lol
 
I'll check some things - any clue why it only happens in a certain range of the knob?
 
thanks ;)

 

Jason (responding to my responding...)

 

Quote:
Sometimes it'll just hit the volume pot exactly right--it can act as a rectifier for noise in the system. 
 
If it's not system-related, or RF interference, we might have to change out the volume pot.

 

 

Since this convo (as of this AM actually) first thing I did was move the power to a different wall socket (it was previously plugged into a UPS into another wall) - same RF issues only at different VOL range settings (like 11-2 o'clock). I had purchased a new TrippLite surge multi-outlet to try out if the wall shift didn't work. After plugging the Trip-Lite into the UPS (which was plugged into the original wall outlet) and reConnecting the M/M stack to the TL outlet...

 

No Static or RF hum!! beyersmile.png

 

As an aside, having the new TL surge protector allowed me to move the M/M stack to a position on my desk where I no longer had to use an audio extension cable to run my Momentums to the stack (previously had to run around the iMac or the original cord would have crossed over my keyboard). I was planning to do this (move the stack to extended power) whether or not the RF signal issue was resolved, just to be able to purify the chain as I noticed while A/B'ing with the original cable VS cable+extender that the sound shifted - flattened a bit when the extender was in place.

 

Realizing this, (and because I really don't want to get back to my work current project right now...) I decided to just try the extender with the new M/M position juuuuuust to see if...

 

Static + RF hum = BACK!! blink.gif

 

OK...so...being the fake scientist that I am, I proceeded to unplug the M/M stack and try to plug BACK into the original UPS without the extender in the chain.

 

...

 

(hold on - this takes a minute...) ...

 

 

 

 

 

 

 

 

No Static or RF hum!! beyersmile.png

 

 

 

- - - - - TLDR VERSION - - - - -

 

The problem was NOT the Magni, was NOT the power and was NOT the usb > Modi chain (machine noise).

The culprit was the (sennheiser) audio extension cable. angry_face.gif /whip!

 

(BTW - the extension cable was from a pair of Senn HD448s, which I had been using at work before the Momentum upgrade)

 

Anyhoo, I'll be sending off an email to Jason soon with this development, but I wanted to post here in case anyone had a similar issue. Just to reiterate, I am beyond thrilled with Schiit and their attention not only to detail and quality, but their service is proving to be an industry leading standard as well.

 

Enjoy All The Audios!!

post #1791 of 2040
Quote:
Originally Posted by mazzelectra View Post
Show (Click to show)

 

Hey peeps,

 

I've been using my Magni at work (iMac 3.4 corei7 > Modi > Magni > Senn Momentum) for about 3 weeks now and it's DRAMATICALLY changed my attitude about being (relatively) early to my office lol

 

Freaking wonderful gear!

 

Anyhoo, just wanted to share a resolution to an issue that arose during my first week (or so) with the Magni. I noticed some scratching in the VOL movements, as well as some seemingly RF static/hum at certain areas of the VOL range (especially 7-11 o'clock - which is my preferred listening lvl). The Frequency hum did not increase or decrease with volume levels appropriately, so I inferred from that there may be a grounding issue or machine signal transferrence going on. It was barely audible, and when music was playing I hardly noticed it, but it was definitely not optimal so eventually I decided to contact Schiit about the issue.

 

Jason responded as promptly as anyone could bounce back an email (as expected, really - their reputation precedes them! no pressure...) Here's the 'official' interaction if anyone's interested (hope he doesn't mind):

 

Warning: Spoiler! (Click to show)

 

me

 

 

Jason

 

 

me (responding)

 

 

Jason (responding to my responding...)

 

 

 

Since this convo (as of this AM actually) first thing I did was move the power to a different wall socket (it was previously plugged into a UPS into another wall) - same RF issues only at different VOL range settings (like 11-2 o'clock). I had purchased a new TrippLite surge multi-outlet to try out if the wall shift didn't work. After plugging the Trip-Lite into the UPS (which was plugged into the original wall outlet) and reConnecting the M/M stack to the TL outlet...

 

No Static or RF hum!! beyersmile.png

 

As an aside, having the new TL surge protector allowed me to move the M/M stack to a position on my desk where I no longer had to use an audio extension cable to run my Momentums to the stack (previously had to run around the iMac or the original cord would have crossed over my keyboard). I was planning to do this (move the stack to extended power) whether or not the RF signal issue was resolved, just to be able to purify the chain as I noticed while A/B'ing with the original cable VS cable+extender that the sound shifted - flattened a bit when the extender was in place.

 

Realizing this, (and because I really don't want to get back to my work current project right now...) I decided to just try the extender with the new M/M position juuuuuust to see if...

 

Static + RF hum = BACK!! blink.gif

 

OK...so...being the fake scientist that I am, I proceeded to unplug the M/M stack and try to plug BACK into the original UPS without the extender in the chain.

 

...

 

(hold on - this takes a minute...) ...

 

 

 

 

 

 

 

 

No Static or RF hum!! beyersmile.png

 

 

 

- - - - - TLDR VERSION - - - - -

 

The problem was NOT the Magni, was NOT the power and was NOT the usb > Modi chain (machine noise).

The culprit was the (sennheiser) audio extension cable. angry_face.gif /whip!

 

(BTW - the extension cable was from a pair of Senn HD448s, which I had been using at work before the Momentum upgrade)

 

Anyhoo, I'll be sending off an email to Jason soon with this development, but I wanted to post here in case anyone had a similar issue. Just to reiterate, I am beyond thrilled with Schiit and their attention not only to detail and quality, but their service is proving to be an industry leading standard as well.

 

Enjoy All The Audios!!

 

 

Any idea how long the extended lead is? I was using my Magni with a pair of DT770s which come with a three metre cable as stock, with that I was literally able to tune into a radio station!

post #1792 of 2040
Quote:
Originally Posted by SamHedges View Post

Any idea how long the extended lead is? I was using my Magni with a pair of DT770s which come with a three metre cable as stock, with that I was literally able to tune into a radio station!


lol exactly wink_face.gif

 

Looks like the naughty Extender (Antenna?!) is around 5.5 - 6 Ft.. (1.6 - 1.8 metres)


Edited by mazzelectra - 8/28/13 at 12:18pm
post #1793 of 2040

The FedEx guy just dropped off my Schiit. I've got it hooked up and running, so far everything appears to be working great! There's just a small detail that's confusing me. I use a program on OS X called Boom for my EQing needs and with the Modi hooked up, my audio outputs look like this:

 

 

If I switch the EQ on Boom off or close the program altogether, it drops down and the Schiit USB Audio Device becomes selected. Obviously the sound changes fairly drastically as I'm no longer EQiing the audio. My question is: With Boom Device selected and the EQ "on" am I still using the Modi as my DAC or is it somehow bypassing that and using the DAC in my Macbook still for audio and simply bypassing the Modi? My headphones are obviously plugged into the Magni and the DAC is hooked up via USB so there's no other way for the audio to avoid going through the Modi short of Boom simply bypassing it somehow. Could someone confirm if this is the case? Also, if it is, is there a way for me to EQ still?

 

Thanks.

post #1794 of 2040
Set the EQ to flat and do an ab comparison between the 2 outputs.
Quote:
Originally Posted by Headphonia92 View Post

The FedEx guy just dropped off my Schiit. I've got it hooked up and running, so far everything appears to be working great! There's just a small detail that's confusing me. I use a program on OS X called Boom for my EQing needs and with the Modi hooked up, my audio outputs look like this:




If I switch the EQ on Boom off or close the program altogether, it drops down and the Schiit USB Audio Device becomes selected. Obviously the sound changes fairly drastically as I'm no longer EQiing the audio. My question is: With Boom Device selected and the EQ "on" am I still using the Modi as my DAC or is it somehow bypassing that and using the DAC in my Macbook still for audio and simply bypassing the Modi? My headphones are obviously plugged into the Magni and the DAC is hooked up via USB so there's no other way for the audio to avoid going through the Modi short of Boom simply bypassing it somehow. Could someone confirm if this is the case? Also, if it is, is there a way for me to EQ still?

Thanks.
post #1795 of 2040

Good idea. Doing this yielded (at least as far as my ears can tell) an identical result. I guess it can be assumed that the Modi is in fact the DAC and that it isn't being bypassed?

post #1796 of 2040
Quote:
Originally Posted by Headphonia92 View Post

Good idea. Doing this yielded (at least as far as my ears can tell) an identical result. I guess it can be assumed that the Modi is in fact the DAC and that it isn't being bypassed?
It is not possible for the signal to bypass Modi.
Modi takes in a digital signal, if your setup was using the dac in your mac then the output would be analog. USB is a digit interface, you cant get analog out from it. So if there is anything going into Modi then it's coming in as digital and Modi is doing its job lust how its meant to
post #1797 of 2040

Awesome, so I can continue to EQ and enjoy the benefit of the DAC at the same time. I'm very happy with this stack (my first). Everything is sounding great! L3000.gif

post #1798 of 2040
Quote:
Originally Posted by Headphonia92 View Post

The FedEx guy just dropped off my Schiit. I've got it hooked up and running, so far everything appears to be working great! There's just a small detail that's confusing me. I use a program on OS X called Boom for my EQing needs and with the Modi hooked up, my audio outputs look like this:

 

 

If I switch the EQ on Boom off or close the program altogether, it drops down and the Schiit USB Audio Device becomes selected. Obviously the sound changes fairly drastically as I'm no longer EQiing the audio. My question is: With Boom Device selected and the EQ "on" am I still using the Modi as my DAC or is it somehow bypassing that and using the DAC in my Macbook still for audio and simply bypassing the Modi? My headphones are obviously plugged into the Magni and the DAC is hooked up via USB so there's no other way for the audio to avoid going through the Modi short of Boom simply bypassing it somehow. Could someone confirm if this is the case? Also, if it is, is there a way for me to EQ still?

 

Thanks.

Assuming you have your Modi plugged into your Magni then the only way you'd be able to hear your music is with the Modi as the DAC. The Modi can only receive a digital signal via the USB so it would be impossible to bypass its DAC.

post #1799 of 2040
Quote:
Originally Posted by MinedSafe View Post

15mW into 300ohms

 

Do you have a link with this info? Are the full specs posted somewhere?
post #1800 of 2040
Just checked the website and here are the power specs... i dont understand where you got 15mW Maximum Power, 32 ohms: 1.2W Maximum Power, 50 ohms: 1.0W Maximum Power, 300 ohms: 260mW Maximum Power, 600 ohms: 130mW
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