Schiit Audio MJOLNIR平衡式耳擴、GUNGNIR 24/192平衡DAC

[Leo Yeh]

MJOLNIR
BALANCED CROSSFETTM HEADPHONE AMPLIFIER
ZERO FEEDBACK | SINGLE VOLTAGE GAIN STAGE
$749.00




Mjolnir is the only dedicated headphone amp using an Circlotron-style topology with high-voltage JFET inputs and MOSFET outputs. Unlike other balanced headphone amps, Mjolnir is not simply two of the same amps in a box, with one run inverted. It’s a unique, inherently balanced stage that delivers both low complexity and very high performance.

“So what the heck does that mean in English?” You ask. Here it is: 8 times the output power, 8X lower distortion, and less noise than Asgard. Mjolnir is a super-powerful amp, but it’s also quiet enough to be used with the most sensitive headphones. And, since it’s all solid-state, it’s set-and forget. No tubes to replace. No tube rolling.

So, what’s the catch? Only this: Mjolnir is ONLY a balanced amp. There are no single-ended outputs. Welcome to the wonders of cross-shunt push-pull topologies.

No-Excuses, End-Game Balanced Amp
You won’t find any balanced-to-single-ended conversion or vice-versa in Mjolnir. It’s balanced in and balanced out, with a 4-gang RK27 Alps volume pot--providing end-game performance for a mid-level price.

High Power for Any Headphones
High-gain amps can be noisy. This doesn’t matter for low-efficiency orthodynamics, but if you have, say, Denons, it may not be ideal. Mjolnir delivers both 8W RMS per channel, and exceptionally low noise.

Unique, Simple Crossfet™ topology
Mjolnir is the only dedicated headphone amp using a Circlotron-style, or cross-shunt push-pull topology. This Crossfet™ topology allows us to use only N-channel MOSFETs, for better matching and lower distortion. It also significantly simplifies the output stage.

Fully Discrete, DC-In and DC-Out Design
Mjolnir uses high-voltage JFETs running on 90V rails to achieve low distortion with only a single voltage gain stage and no feedback. It’s also DC-coupled at both input and output, with a precision DC servo and relay protection for all outputs.

5-Year Warranty
Mjolnir is covered by a limited warranty that covers parts and labor for five years. That’s 5 years. Yes. FIVE. Compare that to the competition.

15-Day Satisfaction Guarantee

Don’t like Mjolnir? No problem. Call us for an RA and send it back for a full refund, minus 5% transaction fee, within 15 days of receiving your amp.When was the last time you spent a couple of weeks in an audio store? With your own equipment? Thought so.

More info? Mjolnir FAQ-->

Specifications

Headphone Impedance: 8-600 ohms

Gain: 8 (18db)

Frequency Response: 2Hz-400KHz, -3dB

Maximum Output: 45V P-P typ. Into 32 ohms, or 8W RMS into 32 ohms, 5W RMS into 50 ohms
THD: Less than 0.008%, 20Hz-20KHz, at 1V

Output impedance: less than 1.5 ohms
Topology: Fully discrete FET, cross-shunt push-pull Crossfet output stage, zero feedback, noninverting, single voltage gain stage

Inputs: one pair balanced XLR, one pair single-ended RCAs, choose one
Outputs: one 4-pin balanced female XLR, one pair dual 3-pin female XLR, and one pair male XLR preamp outs
Power Consumption: 45W

Size: 16 x 8.75 x 2.25”

Weight: 12 lbs

[Leo Yeh]

GUNGNIR
FULLY UPGRADABLE BALANCED DAC WITH
UNIQUE ADAPTICLOCKTM REGENERATION SYSTEM
$749.00 / $849 with USB




Gungnir offers the world’s most advanced Adapticlock™ clock regeneration system in a fully upgradable, hardware-balanced DAC with 32-bit D/A converters, advanced fully discrete analog output stage, with hardware summing for single-ended output. Like Bifrost, it also offers one of the most advanced asynchronous USB 2.0 input sections available. The USB, SPDIF BNC and RCA coax inputs, and Toslink optical input all offer 24/192 capability.

So, what’s all this about Adapticlock? Well, you probably know about jitter. And you probably know one of the best ways to kill it is with high-precision, voltage-controlled crystal oscillator (VCXO) reclocking. Now, that’s all well and good, but what happens when you have a source that won’t allow the VCXOs to lock? You know, like a satellite receiver or some computers? In other cases, you’re toast. The VCXOs unlock, and jitter flows right through the system.

In Gungnir, if the VCXOs won’t lock, it shifts the entire reclocking network to VCOs. This allows us to lock to virtually any input, and still provide a low-jitter regenerated master clock. The result is higher-quality clocks, despite the source.

End-Game Performance With Hardware Balancing
Gungnir uses two AKM4399 32-bit D/A converters for real hardware balancing. Each phase of the output is separately generated, rather than being converted from a single DAC.

Advanced Discrete Analog Section with Hardware Summing
After the DAC, Gungnir uses fully discrete, JFET-input output stages for current gain and filtering. Following that, discrete, JFET-based summing stages convert the balanced signal to single-ended outputs, so that Gungnir can offer both balanced and single-ended output.

Fully Upgradable, Future-Proof DAC

Worried about rapidly-changing USB input technology? Concerned about future advances in D/A conversion? Gungnir’s modular design uses separate, USB Input and DAC/Analog cards. When USB technology changes, we can simply drop in a new, better USB Input Card. When meaningful upgrades to D/A converters come out, we can drop in a new DAC/Analog Card. The result? A virtually future-proof DAC that won't end up in the dumpster.

Advanced Bitperfect Clock Management

Like Bifrost, Gungnir does not use asynchronous sample rate conversion to simplify clock management. All data is passed through, bit-perfect, to the D/A converter, preserving all the original music samples--whether it's 16/44.1 or 24/192.
USB 2.0, 24/192, Async, Completely Buzzword Compliant

Gungnir’s USB input is one of the most advanced implementations available today, featuring a high-speed USB 2.0 interface (not 1.1) and asynchronous data transfer to 24/192, based on the C-Media CM6631 USB receiver. No drivers are required for Macs, and Windows drivers are downloadable for Windows 7, Vista, and XP.

Don't Need USB? Cool.

Order Gungnir without the USB 2.0 Input Card and save some money! Add it in for $150 if you need it later.

Want to read more about Gungnir? Check out the FAQ-->

5-Year Warranty
Gungnir is covered by a limited warranty that covers parts and labor for five years. That’s 5 years. Yes. FIVE. Compare that to the competition. Please note this doesn't mean free upgrades for five years!

15-Day Satisfaction Guarantee

Don’t like your Gungnir? No problem. Call us for an RA and send it back for a full refund, minus 5% transaction fee, within 15 days of receiving your DAC. When was the last time you spent a couple of weeks in an audio store? With your own equipment? Thought so.

Specifications
Inputs: Coaxial RCA SPDIF, BNC SPDIF, Optical SPDIF, USB (optional)

Input Capability: up to 24/192 for all inputs

Input Receiver, SPDIF: Crystal Semiconductor CS8416

Input Receiver, USB: C-Media CM6631
D/A Conversion IC: AKM4399
 x 2
Analog Stages: All fully discrete, JFET-input topology, DC coupled, summed for single-ended output
Output: One pair XLR balanced and one pair RCA single-ended
Output Impedance: 10 ohms
Frequency Response, Analog Stage: 1Hz-100KHz, -1dB (actual frequency response limited by sample rate)

Maximum Output: 4.0VRMS 
(balanced), 2.0VRMS (single-ended)
THD: Less than 0.006%, 20Hz-20KHz

S/N: Greater than 108dB
Power supply: two transformers (one digital, one analog) with 8 stages of regulation, including separate supplies for critical digital and analog sections.

Upgradability: Separate, modular USB Input Card and DAC/Analog Cards are snap-in replaceable.
Power Consumption: 20W

Size: 16 x 8.75” x 2.25”
Weight: 9 lbs

http://schiit.com

[izaka]

這家的產品一直都有在關注 不過感覺應該會直接等 Statement 的系列 XDDD