Magni Heresy raises the bar even higher for affordable headphone amps, with the highest output power in its price class and the cleanest measured performance of any Magni.

Not Just a "Starter Amp"

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Product Review

Magni Heresy raises the bar even higher for affordable headphone amps, with the highest output power in its price class and the cleanest measured performance of any Magni.

Not Just a "Starter Amp"
Magni Heresy has the power, performance, low noise, and versatility to meet all your headphone's needs. You're set from IEMs to hard-to-drive planar designs. With a full 2400mW into 32 ohms, Magni Heresy has tremendous power reserves. Combined with low distortion, an exceptionally low noise floor, and switchable gain, it performs beyond its price.

Even Higher Performance
Magni 3 Heresy has even higher measured performance from integrated (op amp) designs.

It has insanely great measurements from an all-op-amp based headphone amp that uses super high quality parts, including a multiple paralleled output stage with feedforward.

Versatility Comes Standard
Connect Mangni 3 Heresy to your desktop powered monitors, or to a speaker power amp to use it as a preamp. With its built-in time-delayed start-up and instant shut-down, there'll be no glitches or pops through headphones or speakers.

Why the name "Heresy?"
When we started developing an all-op-amp Magni, it was 100% counter to everything we've done. We've always done fully discrete designs, so going op-amp was far, far easier, and more typical in today's world, but it was, well, almost anathema. So to us, an op-amp Magni was heresy. But we're happy with the way it turned out!

Designed and Built in California
The majority of the total production cost of Magni 3 Heresy--chassis, boards, assembly, etc.--goes to US companies manufacturing in the US. Our chassis are made minutes from our facility. Our PCBs are done just over the hill from us, or done in NorCal.

2-Year Warranty
Magni 3 Heresy is covered by a limited warranty that covers parts and labor for 2 years.



  • Magni Heresy is a 100% op-amp-based headphone amp that delivers spectacular measurements with a full 2400mW into 32 ohms, tremendous power reserves, low distortion, an exceptionally low noise floor, and switchable gain.
  • Utilizes super high quality parts, including a multiple paralleled output stage with feedforward. Designed and built in Texas.
  • From IEMs to hard-to-drive planar designs, Magni Heresy has the power, performance, low noise, and versatility to meet the needs of your headphones.
  • Includes preamp outputs that you can connect to your desktop powered monitors for a complete system, or to a speaker power amp and use it as a preamp.
  • With its built-in time-delayed start-up and instant shut-down, there’ll be no glitches or pops through either headphones or speakers. Product is supplied with a 110 – 120V US power supply suitable for use in the United States, Canada, and Mexico. This power supply will not work in 220 – 240V countries.

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