Frequency Response: 20Hz-20Khz, +/-0.01dB

 

Balanced Headphone Output:

Maximum Power, 16 ohms: 6.0W RMS per channel 

Maximum Power, 32 ohms: 5.0W RMS per channel

Maximum Power, 50 ohms: 3.2W RMS per channel

Maximum Power, 300 ohms: 1000mW RMS per channel

Maximum Power, 600 ohms: 500mW RMS per channel

 

Single-Ended Headphone Output:

Maximum Power, 16 ohms: 2.2W RMS per channel 

Maximum Power, 32 ohms: 2.0W RMS per channel

Maximum Power, 50 ohms: 1.3W RMS per channel

Maximum Power, 300 ohms: 300mW RMS per channel

Maximum Power, 600 ohms: 150mW RMS per channel

 

Note: Maximum power rated at 1% THD, high gain

 

THD+N: 

Low Gain, Balanced Output: Less than 0.0001% (-119dB) at 4V RMS into 32 ohms

High Gain, Balanced Output: Less than 0.0003% (-110dB) at 4V RMS into 32 ohms

 

IMD: 

Low Gain, Balanced Output: Less than -112dB at 4V RMS into 32 ohms, CCIF

High Gain, Balanced Output: Less than -110dB at 4V RMS into 32 ohms, CCIF

 

SNR: 

Low Gain, Balanced Output: Greater than 125dB, unweighted, referenced to 4V RMS

High Gain, Balanced Output: Greater than 115dB, unweighted, referenced to 4V RMS

Low Gain, SE Output: Greater than 105dB, unweighted, referenced to 1V RMS

Crosstalk:

Less than -90dB, 20 Hz-20 kHz, either gain, 300 ohm load

Less than -70dB, 20 Hz-20 kHz, either gain, 32 ohm load

 

Output Impedance: Less than 0.1 ohms at either gain

Input Impedance: 50k ohms

 

Gain:

Balanced Output: 1 (0db) or 5 (14db)

Single-ended Output: 0.5 (-6dB) or 2.5 (8db)

Topology: Composite amplifier with OPA1688 input buffers, LME49724 differential amplifier, TPA6120A2 current feedback output stage, DC coupled.

 

Protection: Standard failsafe DC power input and muting relay

 

Power Supply: “Wall wart” style 14-16VAC transformer, linear regulated +/- 13.5V rails with over 6,000uF filter capacitance

 

Power Consumption: 6W idle, 21W max

 

Size: 9 x 6 x 1.5”

 

Weight: 2 lb

 

Right. 

 

Dude, you used the word “conflating.”

 

And Wikipedia. Don’t forget Wikipedia! 

 

We’re glad you asked. The potentiometer is what controls the volume. How well the channels track determine if the volume remains the same between channels at very low levels. How good the taper is determines whether it’s jumpy and hard to use, or gradual and precise. This makes it possibly the single most important component in the amplifier. And that’s why we chose to use the biggest, best potentiometer we could find (at a somewhat-sane price tag)—the 4-gang, 27mm diameter, Japanese-made Alps “Blue Velvet” RK27114. It’s the same potentiometer we use in Jotunheim and Jotunheim R—amps that cost 2 and 4 times as much as Magnius. 

 

Because many amps at and above Magnius’ price use small, 9mm diameter potentiometers. These can be good parts—we use an Alps RK09 in the $99 Magni—but they can’t match the tracking, taper, and feel of an Alps 27mm potentiometer. Again, it’s the control you use the most on your amp, so we decided to give you a really, really good one.

 

Signal switches are Alps, XLR connectors are Neutrik. Again, these are considered to be the industry leaders in parts. ICs are TI, and include some pretty exotic stuff, like the LME49724 balanced, differential op amp. The gain stage is a composite amplifier topology that delivers superb measurements, and sounds very good.

 

Yep, it’s been around a while. But when used as part of a composite amplifier (as an output stage only) it becomes very interesting. And that’s what we’re doing—we’ve created a composite amplifier that uses the strengths of the OPA1688’s feedforward to linearly drive the LME49724 differential amplifier, with the TPA6120A2 just around for output stage duties, where it can source insane amounts of current. 

 

Yes. There is no conversion to single-ended at any stage. The 4-gang potentiometer takes balanced signals natively, and the gain stage is balanced and differential.

 

Nope, it’s made literally across the freeway from us in the same metal stamping partner who does most of our products. The top is aluminum, and the bottom is steel. There are really only two concessions to cost: (1) the bottom standoffs are formed into the chassis, a first for us (also used on Modius), and (2) Magnius is available only in black. 

 

Actually, it’s not that hard. If we’re good at anything, we’re good at production efficiency. It might be better to ask why amps that cost 50-150% more are using less expensive pots, switchgear, and connectors—and are being made in low-wage countries. 

 

No. Come on, guys, we’ve been making things in the USA for 10 years now—ever since we started. It’s part of what we do. It’s not about waving the flag or crapping on other countries. But we make stuff here whenever we can. Except wall-warts. We’ve tried to do that, but we haven’t found anyone who can help us in the USA yet. 

 

Pretty much. 5W into 32 ohms is a ton of power. And it’s dead-silent with IEMs.

 

Yes, there are XLR and RCA preamp outputs on the back.

 

Yes, XLR and RCA.

 

How do the preamp outputs work? Do they mute when you plug headphones in?
Nope. They're on all the time. 

 

Absolutely. 

 

Sometimes we wonder that ourselves. But some people like tube amps and some people want a single-box system and some people need to run speakers too and some people have ribbon headphones. So, you know, horses for courses. And for individual preferences. It would be a boring world if we all drove one single government-issued electric transport pod. Some people like Jeeps. Some people can afford Lamborghinis. Some want Teslas. And, in purely practical terms, Magni Heresy and Modi 3 is a combo at less than half the price that does virtually everything Magnius and Modius does, as long as you don't want or need balanced I/O. Bottom line, we hope you enjoy Magnius…or find something else you like (even if we don’t make it.) It’s all good.

 

Nope. In this strange world where we live, we think there’s room for both an IC-based amp using a wall-wart, and an all-discrete, modular configurable amp using a unique topology and an internal transformer. Maybe we’re right. Maybe we’re wrong. We’ll see how it goes!