Does the Topping DX3 Pro+ drive the Fostex T50RP Mk3?

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

Ample

The Topping DX3 Pro+ drives the Fostex T50RP Mk3 with ample headroom (~11.7 dB headroom at 32 ohms; needs ~123.0 mW, delivers 1800 mW).

Headroom
11.7 dB
Required (110 dB SPL)
123.0 mW
Delivered (@ 32 Ω)
1800 mW
Required voltage
2.57 Vrms

Power Headroom

Headroom: 11.7 dB 0 · target 11.7 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 1800 mW at 32 Ω (+11.7 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 ↗
Topping DX3 Pro+ Dac Amp · Single Ended
Output impedance manufacturer 0.1 Ω
Power @ 32 Ω 1800 mW
Power @ 300 Ω 250 mW
Power @ 600 Ω 125 mW *est.
Power source Manufacturer
* Loads marked "est." are derived from the published voltage ceiling at a lower-impedance load (V = √(P·R) → P_higher = V²/R_higher). All derivations are upward only.
Topping DX3 Pro+ SE headphone output: 1800 mW @ 32 Ω, 250 mW @ 300 Ω (from Topping official spec). Output impedance <0.1 Ω. 600 Ω derived from 300 Ω. · 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

Topping DX3 Pro+ on Amazon ↗ Fostex T50RP Mk3 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 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

See all amplifiers for the Fostex T50RP Mk3 →

HeadphoneHeadroom
Koss Porta Pro Ample 28.2 dB
Grado SR80x Ample 27.9 dB
HiFiMan Arya Ample 17.5 dB
Sennheiser HD 660S Ample 17.4 dB
Beyerdynamic DT 770 Pro 250 Adequate 8.4 dB
Beyerdynamic DT 990 Pro Adequate 7.3 dB

See all headphones for the Topping DX3 Pro+ →