Does the Schiit Fulla 4 drive the AKG K240 Studio?

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

Marginal

The Schiit Fulla 4 marginally drives the AKG K240 Studio; barely reaches target SPL (~2.8 dB headroom at 50 ohms; needs ~79.4 mW, delivers 150 mW).

Headroom
2.8 dB
Required (110 dB SPL)
79.4 mW
Delivered (@ 50 Ω)
150 mW
Required voltage
2.09 Vrms

Power Headroom

Headroom: 2.8 dB 0 · target 2.8 dB below target marginal adequate ample -14 dB +10 +20 +36 dB

Scale shows dB headroom above the 79.4 mW required to reach 110 dB SPL. Amp delivers 150 mW at 50 Ω (+2.8 dB above target).

AKG K240 Studio Dynamic · over-ear
Impedance 55.0 Ω rated
Sensitivity 91.0 dB/mW rated
Driver Dynamic
Spec basis Rated
Rated: AKG official spec (55 Ω, 91 dB/mW at 1 mW). Note: AKG uses dB/V for most models but explicitly states 1 mW here. RAA has no page. · Source ↗
Schiit Fulla 4 Dac Amp · Single Ended
Output impedance manufacturer 0.5 Ω
Power @ 16 Ω 300 mW
Power @ 32 Ω 200 mW
Power @ 50 Ω 150 mW
Power @ 300 Ω 40 mW
Power @ 600 Ω 20 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.
Schiit Fulla 4 manufacturer spec: 300/200/150/40 mW at 16/32/50/300 Ω. NOTE: prior project fixture used 400/300/220/40 — those figures match the Fulla 3 or an earlier revision; updated to Fulla 4 (current product). Output impedance from Schiit spec. · Source ↗

Where to buy

Schiit Fulla 4 on Amazon ↗ AKG K240 Studio 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 18.8 dB
JDS Labs Atom Amp 2 Ample 15.2 dB
Topping DX3 Pro+ Ample 13.6 dB
Schiit Magni Heretic Ample 13.0 dB
Little Dot MkII Marginal 1.0 dB
Apple USB-C to 3.5mm Insufficient -4.1 dB

See all amplifiers for the AKG K240 Studio →

HeadphoneHeadroom
Grado SR80x Ample 18.3 dB
AKG K371 Ample 17.8 dB
Beyerdynamic DT 770 Pro 80 Adequate 8.0 dB
HiFiMan Arya Adequate 8.0 dB
Beyerdynamic DT 770 Pro 250 Marginal 0.5 dB
Beyerdynamic DT 990 Pro Insufficient -0.6 dB

See all headphones for the Schiit Fulla 4 →