Does the Apple USB-C to 3.5mm drive the AKG K702?
Computed from measured specifications · target SPL 110 dB · load 32 Ω
Verdict
InsufficientThe Apple Apple USB-C to 3.5mm cannot drive the AKG K702 to target SPL (~-0.7 dB headroom at 32 ohms; needs ~36.7 mW, delivers 31 mW).
Headroom
-0.7 dB
-0.7 dB
Required (110 dB SPL)
36.7 mW
36.7 mW
Delivered (@ 32 Ω)
31 mW
31 mW
Required voltage
1.55 Vrms
1.55 Vrms
AKG K702
Dynamic · over-ear
| Impedance (rated) | 62 Ω |
| Impedance (measured) Source: reference-audio-analyzer.pro/en/r… | 65.2 Ω measured |
| Sensitivity (rated) | 92.92 dB/mW |
| Sensitivity (measured) | 94.35 dB/mW measured |
| Driver | Dynamic |
| Spec basis | Measured |
Measured by Reference Audio Analyzer (https://reference-audio-analyzer.pro/en/report/hp/akg-k702.php)
· Source ↗
Apple USB-C to 3.5mm
Dongle · Single Ended
| Output impedance review-measured | 1.0 Ω |
| Power @ 32 Ω | 31 mW |
| Power @ 300 Ω | 3 mW *est. |
| Power @ 600 Ω | 1 mW *est. |
| Power source | Review Measured low confidence |
* 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.
Apple does not publish power specs. Power (31 mW @ 32 Ω) from community measurements (Kinemoss Tech review 2025). Output impedance ~1 Ω from multiple independent measurements. Derives 300 Ω and 600 Ω from voltage ceiling. Replaces synthetic 'Generic USB-C dongle' fixture.
· Source ↗
Specification confidence: low
One or more amp specifications (power output or output impedance) are estimated rather than published by the manufacturer. Treat this pairing's verdict as approximate.
Where to buy
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Other amplifiers for the AKG K702
| Amplifier | Headroom |
|---|---|
| Schiit Lyr 3 | Ample 22.1 dB |
| JDS Labs Atom Amp 2 | Ample 18.6 dB |
| Topping DX3 Pro+ | Ample 16.9 dB |
| Schiit Magni Heretic | Ample 16.4 dB |
| Schiit Fulla 4 | Adequate 6.1 dB |
| Little Dot MkII | Adequate 4.3 dB |
Other headphones the Apple USB-C to 3.5mm can drive
| Headphone | Headroom |
|---|---|
| Koss Porta Pro | Ample 10.5 dB |
| Grado SR80x | Ample 10.2 dB |
| HiFiMan Arya | Insufficient -0.1 dB |
| Sennheiser HD 660S | Insufficient -1.4 dB |
| Beyerdynamic DT 770 Pro 250 | Insufficient -10.4 dB |
| Beyerdynamic DT 990 Pro | Insufficient -11.5 dB |