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Headphone Amp : Schiit Audio Magni (Part 1)

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5/26/2014 9:21:29 PM

Under $168.96 and with high-end cred? Schiit Audio’s Magni is the headphone amp to buy if you’re watching the pennies. And it’s made in the USA...

You can stop laughing now. Or maybe not. The joke has not worn off, and Schiit is managing to live with a name that they probably devised after one too many Dirty Martinis: emphasis on the ‘dirty’. The products themselves benefit from Scandinavian nomenclature – Asgard, Bifrost, et al– so, should this stunning little Magni headphone amplifier tempt you, you needn’t approach the salesman with the embarrassing request, ‘Do you stock Schiit?’

Not an IC audio op-amp in sight – the Magni employs all discrete circuitry with a low-noise JFET input, a fast (voltage) preamp stage and substantial output power transistors

Not an IC audio op-amp in sight – the Magni employs all discrete circuitry with a low-noise JFET input, a fast (voltage) preamp stage and substantial output power transistors

The thing is, if you throw enough fancy components at the problem, and follow basic sound design practice, you’re likely to get a reasonable result. But work on something that requires component costs of one-tenth of that flagship silver disc spinner, and you’re into a new world of pain. It’s where real skill comes in, and not everyone has it. Even though standards have recently risen, you need only listen to the average entry-level compact disc player to realise that the ability to make great products at this end of the market remains in short supply.

 

Front face of the all-steel Magni just has a rotary gain control and ¼in headphone socket, plus ‘on’ LED. The unit is powered from an AC wall wart plug

Front face of the all-steel Magni just has a rotary gain control and ¼in headphone socket, plus ‘on’ LED. The unit is powered from an AC wall wart plug

What the absurd name did do is call attention to a brand found at hi-fi shows in huge halls filled with hundreds of likeminded souls. Headphones and the natural adjunct – the amplifiers needed to drive them with more finesse than a weedy socket offered by tablet or smartphone – have been grouped as a separate genre for a few years, and Schiit Audio must compete with the rest in a field that still has a ‘Wild West’ feel to it.

As its founders are seasoned designers of, and I quote, ‘fully balanced differential power amplifiers, fully discrete I/V conversion stages, audiophile D/A converters, relay-switched stepped attenuator volume controls in preamps, etc,’ they could have launched Schiit with whatever they liked. Being savvy, they chose headphone amps, though they also make DACs and we’re promised that other two-channel products will follow.

Catering for today

Schiit recognises that the traditional audiophile path of table radio to console to separates is long gone. ‘Today, nobody starts with a table radio. Everyone… starts with an iPod and headphones screwed into their ears. Headphones are now the standard.’ This is blunt, but honest and right on target. These guys know their Schiit.

Rear panel is basic, with just one pair of RCA phonos for the stereo input signal, on-off switch and 16V power socket. Casework is two-tone with good finish

Rear panel is basic, with just one pair of RCA phonos for the stereo input signal, on-off switch and 16V power socket. Casework is two-tone with good finish

Acknowledging, too, that many newbies soon reach the limits of earbuds, tablet, iPod and computer performance, they asked, what do they do if they don’t possess the gene or the budget that aspires to $33,792.15 wires and $10,137.65 cartridges? The simplest, most obvious move is to a headphone amplifier, something we as audiophiles would deduce immediately, but which is not part of the conditioning of, say, a 17-year-old who’s never known life in front of a pair of speakers.

Schiit works with ‘simple, discrete circuit topologies’ for the analogue sections, while ‘innovative bit-perfect management systems’ are employed ‘on the digital side to avoid asynchronous sample rate conversion’. It also uses Class A designs ‘where practical and single gain stages when possible’. It eschews op-amps, integrated or discrete, except as DC servos, or in the Modi: the least-expensive DAC. Both Mike Moffat and Jason Stoddard are lab rats comfortable with two Stanford Research SR1 audio analyzers, ‘one kitted out with their ultra-low-jitter reference and analysis tools’. Both are unreconstructed audiophiles, so they undertake listening tests with a wide variety of popular headphones.

Despite being built down to a price, the company’s entry-level headphone amp, the $167.27 Magni, is far from Schiit-y. Its build quality, fit and finish do not suggest cost-cutting, and the two controls – the rear-panel on/off toggle and the front panel rotary – feel solid and encouraging. Schiit wants its equipment to be ‘something you can pass down to your children’. And would you believe that the Magni is made in the USA… not China (wall wart excepted)?

This is budget esoterica at its most blissfully simple, inexpensive and compact; it weighs a reassuring 0.45kg. Editor Miller explained that he’s been devising accurate tests for measuring headphone amplifier output: Schiit claims that the Magni delivers 1.2W/32ohm [see PM’s lab Report]. It certainly drove the new Focal Spirit Classic, which barely made a peep with the feed from an iPod. Ironically, this suits the sort of headphones that one might not expect to be partnered with a $167.27 amp: I also gave it a whirl with a grand’s worth of AKG K812s and it was a delight.

This baby runs warm, but it’s suitably ventilated and never caused any worries. A regulated 16V wall wart AC transformer feeds the Magni, and its back accepts line signals via phonos. At the front is the ¼in socket, inviting you to use ‘real’ cans, which are driven by a discrete gain stage design – not IC op-amps – with ‘fast VAS transistors and massive output power transistors’. Schiit also uses a DC servo to eliminate coupling capacitors from the output, operation being Class A/B and DC-coupled throughout.

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