Does the Schiit Magni Heretic drive the HiFiMan Sundara?

Computed from measured specifications · target SPL 110 dB · load 32 Ω

Ample

The Schiit Magni Heretic drives the HiFiMan Sundara with ample headroom (~16.5 dB headroom at 32 ohms; needs ~54.3 mW, delivers 2400 mW).

Headroom
16.5 dB
Required (110 dB SPL)
54.3 mW
Delivered (@ 32 Ω)
2400 mW
Required voltage
1.46 Vrms

Power Headroom

Headroom: 16.5 dB 0 · target 16.5 dB below target marginal adequate ample -14 dB +10 +20 +36 dB

Scale shows dB headroom above the 54.3 mW required to reach 110 dB SPL. Amp delivers 2400 mW at 32 Ω (+16.5 dB above target).

HiFiMan Sundara Planar · over-ear
Impedance (rated) 37 Ω
Impedance (measured) Source: reference-audio-analyzer.pro/en/r… 39.25 Ω measured
Sensitivity (rated) 94.0 dB/mW
Sensitivity (measured) 92.65 dB/mW measured
Driver Planar
Spec basis Measured
Measured by Reference Audio Analyzer (https://reference-audio-analyzer.pro/en/report/hp/hifiman-sundara.php) · Source ↗
Schiit Magni Heretic Desktop Ss · Single Ended
Output impedance manufacturer 0.2 Ω
Power @ 16 Ω 2800 mW
Power @ 32 Ω 2400 mW
Power @ 50 Ω 1600 mW
Power @ 300 Ω 410 mW
Power @ 600 Ω 215 mW
Power source Manufacturer
Manufacturer-rated: 2800/2400/1600/410/215 mW at 16/32/50/300/600 Ω. 16/32/300 confirmed from Schiit product page; 50/600 from original project fixture (step 1). Output impedance 0.2 Ω from Schiit spec. · Source ↗
Planar driver note

Planar-magnetic headphones can have high current demands that are not fully captured by the power headroom model. Even with adequate headroom, some solid-state amps may struggle to deliver sufficient peak current for transient dynamics. Prefer amps rated for low-impedance planars.

Where to buy

Schiit Magni Heretic on Amazon ↗ HiFiMan Sundara on Amazon ↗

Disclosure: links above are Amazon affiliate links. As an Amazon Associate this site earns from qualifying purchases — at no extra cost to you. Affiliate commissions do not influence verdicts; all analysis is computed independently from the data.

AmplifierHeadroom
Schiit Lyr 3 Ample 20.4 dB
Schiit Asgard 3 Ample 18.1 dB
Topping DX3 Pro+ Ample 15.2 dB
FiiO K7 Ample 13.5 dB
Little Dot MkII Marginal 2.7 dB
Apple USB-C to 3.5mm Insufficient -2.4 dB

See all amplifiers for the HiFiMan Sundara →

HeadphoneHeadroom
Grado SR80x Ample 29.1 dB
AKG K371 Ample 28.6 dB
HiFiMan Arya Ample 18.8 dB
Beyerdynamic DT 770 Pro 80 Ample 18.2 dB
Beyerdynamic DT 770 Pro 250 Ample 10.6 dB
Beyerdynamic DT 990 Pro Adequate 9.5 dB

See all headphones for the Schiit Magni Heretic →