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NEW Vali Schiit AMP!!! - Page 12

post #166 of 4963
Thread Starter 

I should have a Vali at the San Diego meet! :bigsmile_face: 

post #167 of 4963

interesting amp. will it be on sale next month?

post #168 of 4963

I don't quite understand this amp. Why and how does Schiit produce amp that seems to do so well with tough to drive hp's at a fraction of the price of amps in their own lineup.

 

Please educate me...

 

Is it replacing the magni? Looks just like it. 


Edited by MattTCG - 10/12/13 at 4:45pm
post #169 of 4963
Quote:
Originally Posted by Headzone View Post
 

What if you put up a resistor in series to lower headphones sensitivity? Would that make lower impedance headphones work?

 

A resistor in series will lower damping factor (headphone impedance / amp output impedance). Since the amp output impedance is already moderately high at 8 ohms, that could make lower impedance headphones sound worse. Headphone sensitivity and headphone impedance are two different things.

post #170 of 4963

I understand the Magni could be theoretically used for the low impedance/high sensitivity headphones that the Vali won't work well with, but the fixed gain on the Magni makes it hard to use said headphones with it, you literally get no volume pot play.

post #171 of 4963
Quote:
Originally Posted by MattTCG View Post
 

I don't quite understand this amp. Why and how does Schiit produce amp that seems to do so well with tough to drive hp's at a fraction of the price of amps in their own lineup.

 

Please educate me...

 

Is it replacing the magni? Looks just like it. 

 

The Vali's output impedance of 8 ohms, although somewhat high, isn't something that's horrible. Folks have opined that a damping factor (headphone impedance / amp output impedance) of at least five is preferable, but this comes down to specific headphones and personal tastes. For headphones with a flat straight impedance curve, we could probably get away with less damping factor before we are able to hear frequency response changes. Even then, the resultant changes could be pleasurable (many headphones have an impedance bump in the bass, which would cause a corresponding rise in that area if the damping factor were too low.) The UERM with the Vali was a disaster in terms of a match because the UERM's nominal impedance is 16 ohms, but its impedance curve is crazy with huge peaks in the midrange and massive roll-off in the treble.

 

The limitation of the Vali's use of these specific tubes is the noise-floor. Noise can be heard with highly sensitive headphones such as Grados, Audio-Technicas, IEMs, etc. The Vali seems to provide a good amount of gain. With an output stage similar to the Magni (I believe the Vali has about 50% of the power of the Magni?), the Vali can put out a decent amount of volume / power. To put things in perspective, I once blew up (literally smoke and flames) the output chips of a Objective2 amp at the same level where the Magni was just showing some minor strain on the distortion analyzer. Another thing to put into perspective: The Magni can output almost the same power as the Eddie Current Balancing Act into 32 ohms.

 

The fact is, we don't really need that much power to drive many of these headphones. That is many of these headphones are not that hard to drive. This is why I find it disturbing when I see people write "How does it do with hard to drive headphones like the LCD2?"

 

This is not to say the extra power and higher damping factor of the bigger Schiit amps (Asgard 2, Mjolnir) don't have any effect. The bass is notably tighter and with more slam on the HE-400, HE-500, and Paradox from the Mjolnir (I tried those last night) than from the Vali.


Edited by purrin - 10/12/13 at 5:16pm
post #172 of 4963

Thank you kindly for the information. I just finished reading the thread but I appreciate the concise explanation none the less. So now the question for me is this, "how would the Vali do with something like the he-4? And how would that pairing look against A2 and lyr? 

post #173 of 4963

Wouldn't you say the better bass control and authority on the bigger Schiit amps is more a result of their beefier components than more total power?

post #174 of 4963

Hard to say. While testing a few prototype power supplies for an EC amp in development, I noted stiffer (ones which have less voltage drop) diodes / tubes resulted in tighter and more slamming bass. On the other hand, I really like the bass performance and transient response of the HE-500 when driven by the Mjolnir, and even more from my 100 watt pro power amp.

post #175 of 4963

My theory behind the speaker amps is they use really robust stuff in their chassis which are meant to swing huge amounts of power at a moment's notice, possibly playing really well with the bass of planar magnetics.  Have you tried the much talked about Emotiva Mini-X yet Purrin? Would be interested to get your take on that.

post #176 of 4963

Yeah your Crest amp is a beast Purrin, makes the Emotiva look weak.

post #177 of 4963

The Pioneer sx-1280 completely changed my perception of what it takes to drive planar magnetic headphones. I will never forget plugging the he-4 into the Pioneer and hearing the loud thud which turned out to be my jaw hitting the top of my desk. I reached over and knocked down the treble a notch and was in disbelief that the he-4 was able to reproduce music in such fashion. 

 

I pretty sure that the Vali will fit in the glove box of the Pioneer. :p 

 

Seriously, I have some interest in the Vali. Just trying to figure out where Jason and the boys are marketing this and where it's best suited. One thing for sure, it should be a nice piece of...well, you know. 

post #178 of 4963
Quote:
Originally Posted by MattTCG View Post
 

The Pioneer sx-1280 completely changed my perception of what it takes to drive planar magnetic headphones. I will never forget plugging the he-4 into the Pioneer and hearing the loud thud which turned out to be my jaw hitting the top of my desk. I reached over and knocked down the treble a notch and was in disbelief that the he-4 was able to reproduce music in such fashion. 

 

I pretty sure that the Vali will fit in the glove box of the Pioneer. :p 

 

Seriously, I have some interest in the Vali. Just trying to figure out where Jason and the boys are marketing this and where it's best suited. One thing for sure, it should be a nice piece of...well, you know. 

 

You always make me want to go pull out my SX-990 and hook it up again. 

post #179 of 4963
Matt, I doubt the Vali would pair well with the HE4. The Vali seems to be doing fine with the planars that sound good off standard amps. The HE4 isn't one of those newer planars that can be driven by standard amps (remotely well). As Purrin said, the Vali has about half the power of the Magni, and the Magni isn't exactly a Lyr. You know the HE4 likes a lot of power/current. Hifiman states 2watts at it's 40 something impedance. I fed it 10 watts (SA-31) and it still was pushing that amp, as well as the Lyr. Hell, Hifiman solds the HE4 with a cable to use for speaker taps...or whatever that was.

The Vali seems more suited for higher impedance headphones.
Edited by Mad Lust Envy - 10/12/13 at 7:40pm
post #180 of 4963
Point taken. Thank you.
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