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Ten years ago, we introduced the first Magni. Since then, we’ve been refining and improving the line, to the point where Magni is now the only affordable, true no-excuses headphone amp and preamp. It’s literally the only headphone amp you’ll ever need.

No Excuses—Across the Board
No excuses. Not in design, with discrete and advanced op-amp designs on the table. Not in parts, from its high-spec, sorted potentiometer to high-end thin-film resistors and silicon capacitors. Not in looks, with an all-new steel chassis using advanced stamping techniques. Not in safety, with new protection systems help protect your best headphones. And not even in manufacturing, with USA suppliers and Corpus Christi, Texas production.

Exotic Discrete Design…or Insane Measured Performance
Magni+ is the only affordable headphone amp that offers a exotic, current-feedback, all-discrete design—for the same price as our Magni Heretic, an op-amp design with a unique topology that gives you even more insane measured performance.

  • Choose Magni+ for the ultimate expression of an affordable all-discrete headphone amp—for hundreds less than other discrete designs (including our own!)
  • Choose Magni Heretic for insanely great measurements from a unique op-amp topology that includes no overall feedback and a massively paralleled feedforward output stage. Or if you like red--Magni Heretic has a red bottom chassis.

Total Confidence for All Headphones
Both Magni models offer three gain levels, including negative gain, to span all of your headphone needs. Use power-hungry planars…or super-sensitive IEMs. We’ve also incorporated a decade of learning in protection systems. Don’t worry about plugging your favorite headphones into Magni—included overcurrent and DC protection help ensure they’re totally safe.

Create a Complete Desktop System
All Magnis include preamp outputs. This means you can connect any Magni to your desktop powered monitors for a complete system—or even connect it to a speaker power amp and use it as a preamp.

Designed and Built in Texas
By “designed and built in Texas" this is what we mean: the vast majority of the total production cost of Magni—chassis, boards, transformers, assembly, etc—goes to US companies manufacturing in the US. In the case of the Magni family, the chassis are made in California, the PCBs are made in Nevada, and it all comes together at our Corpus Christi, TX facility.

 

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Frequency Response: 20Hz-20Khz, +/-0.02dB

Maximum Power, 16 ohms: 2.8W RMS per channel
Maximum Power, 32 ohms: 2.4W RMS per channel
Maximum Power, 50 ohms: 1.6W RMS per channel
Maximum Power, 300 ohms: 410mW RMS per channel
Maximum Power, 600 ohms: 215mW RMS per channel

THD+N: 

High Gain: Less than 0.0007% (-102dB) ref 1V RMS, 300 ohms
Low Gain: Less than 0.0003% (-110dB) ref 1V RMS, 300 ohms

IMD: 

High Gain: Less than -103dB ref 1V RMS, 300 ohms, CCIF
Low Gain: Less than -112dB ref 1V RMS, 300 ohms, CCIF

SNR: 

High Gain: Greater than 110dB, unweighted, ref to 2V RMS
Low Gain: Greater than 121dB, unweighted, ref to 2V RMS

Crosstalk: Less than -85dB at 1V RMS out

Output Impedance: Less than 0.2 ohms at either gain

Input Impedance: 25k ohms

Gain: -8dB, 0dB, or 14dB, selectable via front switch

Topology: Fully discrete, fully complementary all-bipolar, symmetrical current-feedback design with driver stage and Vbe multiplier, no capacitors in the signal path and DC servo

Protection: Transparent overcurrent sense and protect, DC correction, failsafe DC power input and muting relay

Power Supply: “Wall wart” style 24VA 14VAC transformer, regulated +/- 16V rails with over 8,000uF filter capacitance

Power Consumption: 6W

Size: 5 x 3.5 x 1.25”

Weight: 1 lb

APx555 Report for Magni+


Magni Heretic

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

Maximum Power, 16 ohms: 2.8W RMS per channel
Maximum Power, 32 ohms: 2.4W RMS per channel
Maximum Power, 50 ohms: 1.6W RMS per channel
Maximum Power, 300 ohms: 410mW RMS per channel
Maximum Power, 600 ohms: 215mW RMS per channel

THD+N: 

High Gain: Less than 0.0002% (-112dB) ref 2V RMS at 300 ohms
Low Gain: Less than 0.0001% (-119dB) ref 2V RMS at 300 ohms

IMD: 

High Gain: Less than -112dB at 1V RMS into 32 ohms, CCIF
Low Gain: Less than -115dB ref 1V RMS into 300 ohms, CCIF

SNR: 

High Gain: Greater than 115dB, unweighted, ref 2V RMS
Low Gain: Greater than 123dB, unweighted, ref 2V RMS

Crosstalk: Less than -86dB, ref 1V out

Output Impedance: Less than 0.33 ohms at either gain

Input Impedance: 50k ohms minimum in all gains

Gain: -10dB, 0dB, or 15dB, selectable via front switch

Topology: OPA1656 op-amp for voltage gain with local feedback, OPA1656 (6 stages per channel) as output buffers with local loops, no overall loop feedback.

Protection: Transparent current sense and protect, DC sense and protect, ESD protect, failsafe DC power input and muting relay

Power Supply: “Wall wart” style 24VA 15VAC transformer, regulated +/- 16V rails with over 8,000uF filter capacitance

Power Consumption: 6W

Size: 5 x 3.5 x 1.25”

Weight: 1 lb

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