Does the Schiit Asgard 3 drive the Fostex T50RP Mk3?

Computed from measured specifications · target SPL 110 dB · load 50 Ω

Verdict

Ample

The Schiit Asgard 3 drives the Fostex T50RP Mk3 with ample headroom (~13.1 dB headroom at 50 ohms; needs ~123.0 mW, delivers 2500 mW).

Headroom
13.1 dB
Required (110 dB SPL)
123.0 mW
Delivered (@ 50 Ω)
2500 mW
Required voltage
2.57 Vrms

Power Headroom

Headroom: 13.1 dB 0 · target 13.1 dB below target marginal adequate ample -14 dB +10 +20 +36 dB

Scale shows dB headroom above the 123.0 mW required to reach 110 dB SPL. Amp delivers 2500 mW at 50 Ω (+13.1 dB above target).

Fostex T50RP Mk3 Planar · over-ear
Impedance (rated) 50 Ω
Impedance (measured) Source: reference-audio-analyzer.pro/en/r… 53.65 Ω measured
Sensitivity (rated) 91.0 dB/mW
Sensitivity (measured) 89.1 dB/mW measured
Driver Planar
Spec basis Measured
Measured by Reference Audio Analyzer (https://reference-audio-analyzer.pro/en/report/hp/fostex-t50rp-mk3.php) · Source ↗
Schiit Asgard 3 Desktop Ss · Single Ended
Output impedance manufacturer 0.2 Ω
Power @ 16 Ω 5000 mW
Power @ 32 Ω 3500 mW
Power @ 50 Ω 2500 mW
Power @ 300 Ω 600 mW
Power @ 600 Ω 300 mW
Power source Manufacturer
Schiit Asgard 3 manufacturer spec: 5000/3500/2500/600/300 mW at 16/32/50/300/600 Ω. Output impedance <0.2 Ω from 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

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AmplifierHeadroom
Schiit Lyr 3 Ample 16.9 dB
JDS Labs Atom Amp 2 Ample 13.3 dB
Schiit Magni Heretic Ample 11.1 dB
FiiO K7 Adequate 10.0 dB
Little Dot MkII Insufficient -0.9 dB
Apple USB-C to 3.5mm Insufficient -6.0 dB
HeadphoneHeadroom
Grado SR80x Ample 30.7 dB
AKG K371 Ample 30.2 dB
HiFiMan Arya Ample 20.4 dB
Beyerdynamic DT 770 Pro 80 Ample 20.2 dB
Beyerdynamic DT 770 Pro 250 Ample 12.2 dB
Beyerdynamic DT 990 Pro Ample 11.1 dB