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AmplifiersHeadphone AmplifiersPre-AmplifiersDiscontinued
Estimated price (community-sourced)
$85
Around — community and catalog average, updates slowly
About the Magni Heresy
The Magni Heresy is a compact, solid-state headphone amplifier and preamplifier built around an all-op-amp topology. It has RCA line inputs, RCA preamp outputs, a front-panel 6.35 mm headphone output, and selectable low and high gain. Its output stage uses parallel OPA1688 op-amps, with an OPA1662 used for voltage gain. The unit has an all-metal chassis and an external AC power supply.
Specifications
Type: Solid-state headphone amplifier / preamplifier; topology: OPA1662 voltage-gain stage and parallel OPA1688 output buffers; rated output power: 2.4 W RMS per channel into 32 Ω, 2.8 W into 16 Ω, 1.6 W into 50 Ω, 410 mW into 300 Ω, 215 mW into 600 Ω; frequency response: 20 Hz–20 kHz, ±0.04 dB; gain: selectable low (3 dB) or high (18 dB); output impedance: <0.25 Ω; inputs: stereo RCA; outputs: 6.35 mm headphone jack and stereo RCA preamp outputs; power: external AC supply.