Violectric HPA V90 - Reviews
Pros: Outstanding Performance with Orthos
Cons: None of the jewelry of its older brothers
The Violectric V series amps are consumer/ audiophile grade products from German pro audio house Lake People.
Fried Reim, CEO and head designer at Lake People/ Violectric, has recently released a Lake People branded line of consumer grade headphone amps as well. The new Lake People G series line will include both balanced and unbalanced configurations.... The G103S (Single Ended) G103P (Pro - Balanced), G109S and G109P.
When looking for my desktop amplifier solution, I had initially focused on the G109S (after wringing my hands over Burson, Apex, Woo and Schiit options) however in a last minute change of heart opted for the runt of the litter in the Violectric line. The V90 shares a good portion of its design traits with the G109 and so my decision was largely one of aesthetics.... I opted to pay an extra $15USD for the Violectric logo laser engraved across the face plate. 
I placed the order by email through Fried's sales office (whom were tremendously helpful and courteous through the process), and the amp arrived two business days later. Out here in California I did have to pay UPS a $30.00 import duty fee to take delivery of the amp from UPS. I mentioned this to another Head-fi'er who had recently purchased a Lake People amp but he did not have any import duty on his parcel which made its way to Utah. I have to believe its either something associated with the Local Port of Long Beach or California... The State of California loves itself some fees and taxes so this does not come as a complete surprise. That said if you are in California, you should recognize that this will likely need to be included in your budget.  
The Amp came well protected in an egg crate foam lined box with a simple 10 page owners manual, power cord and the amp itself.
Physical Appearance
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The V90 is the entry level Violectric amp and as such is not adorned with the same jewelry as his older siblings. Where the V100, V181 and V200 showcase the brands iconic gold chassis feet, the V90 makes do with simple smallish but chunky black rubber feet. Where the V100, V181 and V200 have 8mm thick aluminum face plates with beveled edges and beveled insets at the headphone jacks and power buttons.... The V90 has a simple flat face plate with headphone jacks and power button surface mounted. 
It does have the same Violectric logo and model number laser etched into the face plate along the top and left edge, the same suede like Nextel coating around the remaining chassis, the same textured aluminum knob and the same deep blue LED below the power switch. But for nearly $200 less than the V100 and at nearly half the price of the V181 and V200 costs have to be cut somewhere.... I've gotta believe I am in the majority when I say I'd rather they cut corners on bling than components that affect the sound quality.
However even without the other pretty little bells and whistles, with the laser etched logo, model number and the grey suede coating, it is still a very handsome and well built amp. Sitting along side my headphones and laptop, it is still the prettiest looking piece of kit in the bunch.... black feet and all. 
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As far as measurements, the V90 is  a full 4 inches shorter than his older brothers but measures the same in width and height. As far as how it matches up spec wise.... I'll leave that to you. If you are interested in the model by model breakdown, here is a link to the technical spec sheet for all 4 amps on Lake People's site:
What is worth noting is the current delivery these amps provide. The V90 is the smallest of the Violectric line and yet it kicks 1300mw into a 32ohm load & 2300mw into a 100ohm load. And for what it is worth the V90 also scores of the highest of all Violectric models with 730mw into a 600 ohm load... This high current delivery means the Violectric can and does exert masterful control of headphones.
Intel of the Inside
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Opening up the case the path to sonic nirvana is paved with op-amps and monolithic IC's. I don't have enough technical knowledge to tell you the how and what regarding the circuit topology but the amp essentially applies AC voltage through an 3.5VA Alfamag transformer with 22 volt secondaries i.e. 32 volts rail to rail. The V90 is running  NE5532 opamps at the back of the case which I believe is an input buffer because Fried commented that the socketed opamps handled low level signal duties when people pressed him about swapping those opamps. There are 2 three 3 legged critters which I believe are the rectifiers from AC to DC and 2 Burr Brown/ Texas Instruments OPA551 integrated circuits. Obviously the parts count is a lot higher than a gainclone but it is a chip amp nonetheless. The major improvement the V90 sees over its G109s sibling is the inclusion of thru hole metal film resistors and capacitors. The pro version of the G109 also includes thru-hole parts but the single ended output G109s gets by with tiny smd mount resistors and caps. An ALPS RK14 pot handles volume and headphones plug in through silver plated Neutrik 1/4" headphone jacks.... The dual jacks is a real nice benefit however I have noticed that I can't really keep different headphones plugged in both to do swaps unless I have two sets of cans with relatively close impedance and sensitivity. Setting my Denon D5000's on one and the Hifiman HE400's on the other proved dangerous as I turned the dial to twelve to get a good volume out of the HE400's.... the Denon's were being pushed to near their limit and when I went to switch back to the Denon's realized just how painfully loud they were.
If you do plug two in at the same time you can here an audible little scratch when connecting however there is no drop off in volume. 
A few other things to note is that there is a ground lift jumper inside to lift the component ground for pro audio ground loops. Pro audio habits die hard I guess, but it also is an option for removing hum. I personally don't use XLR cables so keep the ground grounded. 
So what does it sound like?
The first couple listening sessions I was staggered by just how good my Hifiman headphones sounded. I had been playing them through an ALO Audio portable amp (Continental and National) and thought they had some serious limitations on them because I tended to hear distortion and frayed edges coming into play whenever I took the HE400 above a certain volume. There is none of that slop with the V90. It's high levels of current bear obvious sonic fruit as it takes authoritative control over the mini transducers in both my planar magnetic and dynamic headphones and does exactly what it is supposed to do.... amplify the signal.
The amp is not colored.... I would call it neutral but I don't like this word because neutral is different from person to person and the word neutral itself is such an inert and lifeless descriptive word in the first place. It short changes people like myself who are looking for terms like "lush" "warm" and "smooth". Trust me when I say the amp does not lack for musicality. It doesn't sterilize the music. Although to be honest, I've never really heard an amp that did such a number as to sterilize music. Music is music for God's sake, of course it has musicality.
However using a word like warm, lush, or musical will triggers thoughts from others that the sound is too congealed and syrupy. There is none of that here. No with the V90 there is no part of the frequency range that I see as tipped up or down either way. The amp itself seems essentially linear in its response.... that is not to say that music is not warm, lush and smooth through it.... it is.... because music is friggin musical. But it has more to do with the guitars, voices, drums etc... sounding warm, smooth, rich and full than the amp... the amp is very good but it doesn't denote a "house sound". A wire with gain. 
Bass is powerful and well driven, highs are clear and crisp, mids and full and live sounding... but none of it seems to be intrinsic to the amp itself... the amp seems to make good music, louder... A good signal amplified to a bigger good signal... but doesn't exact its own price tag on the music for passing through it's circuits. 
What is remarkable to me about this amp is the benefit one gets from its higher than normal power rating.... Because it pushes such a strong level of current and controls headphones so authoritatively... it seems to be immune to distortion, low frequency fuzz and other transient hash that plagues so many under powered portables that I have heard.... It seems confident and sure footed... I have not been able to get this amp to break form at even the highest volume levels I can endure. 
It reminds me of the feeling one gets driving a BMW for the first time... that anchored to the road feeling.... that sensation that makes you unmistakably aware that this car was engineered to drive on the autobahn at 140 MPH... 
Moving from low impedance cans, to orthos to 300 ohm Sennheisers was a snap. A quick flip of the switches on the back and the amp was optimized for multiple configurations. I was able to use IEM's, 32 ohm portable cans, 40 ohm ortho-dynamics and 300 ohm pro audio cans without any lack of synergy... The Violectric does it all very very well.
Compared to a similarly priced portable amp.... it flat out leaves it in the dust. The portable simply doesn't have the horses to keep up and starts getting wobbly and breaks up.... The Violectric smashes ahead violently fast but without losing so much as an inch of form.... locked onto the highway... It's confident and sure footed as it flies down the roadway to audio nirvana.
I am certain there are qualities in the upper range of this line that justify their significantly higher price tag.... but for the money... a scant $440.00 + shipping, I cannot think of a better amp to pair with planar magnetic headphones.
Little brother maybe.... but a bad ass nonetheless.
Good review, thanks. Seems like all the headphone amping one will ever need.
Very helpful review! Thanks!
I just bought this. I was pleasantly surprised at how great it sounds. I think it's a great value for the price