STATUS: In stock. Orders placed now will ship in 1-2 business days.
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.
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-->
Frequency Response: 20Hz-20Khz, -0.1db, 2Hz-400KHz, -3dB
Maximum Power, 32 ohms: 8.0W
Maximum Power, 50 ohms: 5.0W
Maximum Power, 300 ohms: 850mW
Maximum Power, 600 ohms: 425mW
THD: <0.006%, 20Hz-20KHz, at 1V RMS
IMD: <0.008%, CCIR
SNR: >104db, unweighted, referenced to 1V RMS
Crosstalk: >-75dB, 20 Hz-20KHz
Output Impedance: 1.5 ohms
Gain: 8 (18db)
Topology: Fully discrete FET, cross-shunt push-pull Crossfet output stage, no overall feedback, noninverting, single voltage gain stage
Power Supply: specific Circlotron 4-primary output stage transformer with over 65,000uF filter capacitance, plus dedicated transformer for high-voltage asymmetrical discrete-regulated front end stage with 90V/25V rails and over 15,000uf of filter capacitance
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: 13 lbs
*All measurements made on a Stanford Research SR1+ Audio Analyzer