This is a review and detailed measurements of the new Schiit Magnius Balanced (input and output) headphone amplifier. It was kindly sent to me by the company and costs US $199 direct plus shipping.
The sample I received is in black which gives a serious look to the new amp:
There is an input selector (balanced or XLR) and gain with dual settings.
The volume control is a bit stiff but not a problem.
Back panel shows what you expect:
The AC transformer is hefty in size and gets a bit warm in use. Do not attempt to replace it with a DC power supply. AC power is used so that it is easier and higher quality to generate both positive and negative voltages needed for the amplification. So you need to get the right one for your country's voltage.
Headphone Amplifier Measurements
As usual we start with our dashboard of 1 kHz and see what comes out of the unit. I started with 1/4 inch headphone output while feeding the Magnius XLR input:
Hmmm. This is no good. We have headphone amplifiers clocking at SINAD (sum of noise and distortion) at 120 dB and here we are short of that by good bit at 94. And the issue is that second harmonic spike. I figured Schiit would not send me this unit if it did not measure well so I checked the XLR balanced headphone output and Magnius came to life:
Distortion sank down to less than 140 dB and SINAD is now playing with the rest of the record setters:
I confirmed the above with the company and they confirmed that is expected performance.
From here on, the tests are all with balanced output.
At unity gain like above, signal to noise ratio is excellent (left bar charts):
When reducing the output way down to just 50 millivolts, performance is above average:
Frequency response is flat way beyond audible band which is expected and great:
32-tone test signal resembling "music" shows the same very low distortion levels:
Distortion versus frequency is very low and consistent:
Balanced Headphone Amplifier Power Measurements
Headphone amplifiers subjectively live or die by how much power they generate and how clean they. The are brand new tests with optimized wiring harness and best settings in the analyzer. Let's start with 300 ohm load:
Using low gain, the noise and distortion levels are state of the art. You get 57 milliwatts which should be enough to drive many headphones.
If you need more power, high gain mode produces whopping 762 milliwatts of power that is competitive with likes of Drop THX 789.
Going the other extreme with a 50 ohm load to see how much current is available we get a similar picture:
As before low gain produces the best performance with max of 1/3 of watt. Unleashing the high gain mode produces whopping 4.2 watts. There is some rise in distortion at the limit but it is still at 112 dB which is inaudible for any practical purpose.
Headphone Amplifier Channel Balance
The Magnius doesn't have the ultra low, negative gain setting that some other amps have so you may rely on the lower settings of the volume control for sensitive IEMs making this test important:
Performance is good to about 30 dB of attenuation but after that, the error climbs exponentially with the level dropping the same way.
Subjective Listening Tests
Only my very low sensitivity, low impedance Ether CX headphones were ready to go with balanced cables so I tested with that. In low gain, Magnius was able to drive the Ether CX to near deafening levels. The sound was exceptionally clean with authoritative bass. Indeed it is so good I have been enjoying listening to my audiophile playlist as I have been typing this review!
Switching to high gain spanked the Ether CX like nobody's business. I could easily get the drivers to bottom out and start to crackle!!! I only did this for a second or two so please don't try to do it yourself as you risk hearing damage. I am here to do stupid things so you don't need to!
Conclusions
For a balanced input and output the Schiit Magnius provides superb performance objectively and subjectively at incredibly low price for this class. XLR input is very useful to avoid common ground loops especially in desktop products connected to computers where such annoyances and pop up. If you have a balanced DAC like Schiit's own Modius, you have found the perfect match for it.
Performance using 1/4 inch headphone is ordinary from measurement point of view so I don't recommend getting it just to use it that way although the benefit of XLR input remains.
Overall, I am very pleased to recommend the Schiit Magnius balanced headphone amplifier. It breaks the price/performance barrier for exceptional performance at budget pricing.
-----------
As always, questions, comments, recommendations, etc. are welcome.
I had to set the alarm to get up "early" to post this review post announcement. I do a lot for you all but getting up early is not one of them! So I expect to get paid and paid good for not getting enough sleep by having you donate what you can using : https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/
The sample I received is in black which gives a serious look to the new amp:
There is an input selector (balanced or XLR) and gain with dual settings.
The volume control is a bit stiff but not a problem.
Back panel shows what you expect:
The AC transformer is hefty in size and gets a bit warm in use. Do not attempt to replace it with a DC power supply. AC power is used so that it is easier and higher quality to generate both positive and negative voltages needed for the amplification. So you need to get the right one for your country's voltage.
Headphone Amplifier Measurements
As usual we start with our dashboard of 1 kHz and see what comes out of the unit. I started with 1/4 inch headphone output while feeding the Magnius XLR input:
Hmmm. This is no good. We have headphone amplifiers clocking at SINAD (sum of noise and distortion) at 120 dB and here we are short of that by good bit at 94. And the issue is that second harmonic spike. I figured Schiit would not send me this unit if it did not measure well so I checked the XLR balanced headphone output and Magnius came to life:
Distortion sank down to less than 140 dB and SINAD is now playing with the rest of the record setters:
I confirmed the above with the company and they confirmed that is expected performance.
From here on, the tests are all with balanced output.
At unity gain like above, signal to noise ratio is excellent (left bar charts):
When reducing the output way down to just 50 millivolts, performance is above average:
Frequency response is flat way beyond audible band which is expected and great:
32-tone test signal resembling "music" shows the same very low distortion levels:
Distortion versus frequency is very low and consistent:
Balanced Headphone Amplifier Power Measurements
Headphone amplifiers subjectively live or die by how much power they generate and how clean they. The are brand new tests with optimized wiring harness and best settings in the analyzer. Let's start with 300 ohm load:
Using low gain, the noise and distortion levels are state of the art. You get 57 milliwatts which should be enough to drive many headphones.
If you need more power, high gain mode produces whopping 762 milliwatts of power that is competitive with likes of Drop THX 789.
Going the other extreme with a 50 ohm load to see how much current is available we get a similar picture:
As before low gain produces the best performance with max of 1/3 of watt. Unleashing the high gain mode produces whopping 4.2 watts. There is some rise in distortion at the limit but it is still at 112 dB which is inaudible for any practical purpose.
Headphone Amplifier Channel Balance
The Magnius doesn't have the ultra low, negative gain setting that some other amps have so you may rely on the lower settings of the volume control for sensitive IEMs making this test important:
Performance is good to about 30 dB of attenuation but after that, the error climbs exponentially with the level dropping the same way.
Subjective Listening Tests
Only my very low sensitivity, low impedance Ether CX headphones were ready to go with balanced cables so I tested with that. In low gain, Magnius was able to drive the Ether CX to near deafening levels. The sound was exceptionally clean with authoritative bass. Indeed it is so good I have been enjoying listening to my audiophile playlist as I have been typing this review!
Switching to high gain spanked the Ether CX like nobody's business. I could easily get the drivers to bottom out and start to crackle!!! I only did this for a second or two so please don't try to do it yourself as you risk hearing damage. I am here to do stupid things so you don't need to!
Conclusions
For a balanced input and output the Schiit Magnius provides superb performance objectively and subjectively at incredibly low price for this class. XLR input is very useful to avoid common ground loops especially in desktop products connected to computers where such annoyances and pop up. If you have a balanced DAC like Schiit's own Modius, you have found the perfect match for it.
Performance using 1/4 inch headphone is ordinary from measurement point of view so I don't recommend getting it just to use it that way although the benefit of XLR input remains.
Overall, I am very pleased to recommend the Schiit Magnius balanced headphone amplifier. It breaks the price/performance barrier for exceptional performance at budget pricing.
-----------
As always, questions, comments, recommendations, etc. are welcome.
I had to set the alarm to get up "early" to post this review post announcement. I do a lot for you all but getting up early is not one of them! So I expect to get paid and paid good for not getting enough sleep by having you donate what you can using : https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/