Does the Schiit Magni Heretic drive the AKG K240 Studio?
Computed from rated specifications · target SPL 110 dB · load 50 Ω
Verdict
AmpleThe Schiit Magni Heretic drives the AKG K240 Studio with ample headroom (~13.0 dB headroom at 50 ohms; needs ~79.4 mW, delivers 1600 mW).
Headroom
13.0 dB
13.0 dB
Required (110 dB SPL)
79.4 mW
79.4 mW
Delivered (@ 50 Ω)
1600 mW
1600 mW
Required voltage
2.09 Vrms
2.09 Vrms
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.
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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.
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Where to buy
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Other amplifiers for the AKG K240 Studio
| Amplifier | Headroom |
|---|---|
| Schiit Lyr 3 | Ample 18.8 dB |
| JDS Labs Atom Amp 2 | Ample 15.2 dB |
| Topping DX3 Pro+ | Ample 13.6 dB |
| FiiO K7 | Ample 11.9 dB |
| Little Dot MkII | Marginal 1.0 dB |
| Apple USB-C to 3.5mm | Insufficient -4.1 dB |
Other headphones the Schiit Magni Heretic can drive
| Headphone | Headroom |
|---|---|
| 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 |