Does the Schiit Valhalla 2 drive the AKG K702?

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

Adequate OTL-compatible pairing

The Schiit Valhalla 2 adequately drives the AKG K702 with limited margin (~6.9 dB headroom at 50 ohms; needs ~36.7 mW, delivers 180 mW). This OTL tube amp suits the headphone's impedance (65 Ω) — a classically compatible pairing for high-output-impedance tube sources.

Headroom
6.9 dB
Required (110 dB SPL)
36.7 mW
Delivered (@ 50 Ω)
180 mW
Required voltage
1.55 Vrms

Power Headroom

Headroom: 6.9 dB 0 · target 6.9 dB below target marginal adequate ample -14 dB +10 +20 +36 dB

Scale shows dB headroom above the 36.7 mW required to reach 110 dB SPL. Amp delivers 180 mW at 50 Ω (+6.9 dB above target).

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 ↗
Schiit Valhalla 2 Desktop Tube · Single Ended
Output impedance manufacturer 14.0 Ω
Power @ 50 Ω 180 mW
Power @ 300 Ω 800 mW
Power @ 600 Ω 450 mW
Power source Manufacturer
Schiit Valhalla 2 manufacturer spec (Audiophonics retailer, citing Schiit official): 180/800/450 mW at 50/300/600 Ω. OTL/hybrid topology: more power into 300 Ω than 50 Ω (normal for OTL). Output impedance 14 Ω (hi-gain) / 3.5 Ω (lo-gain) from Schiit PDF manual and Schiit Europe. Using 14 Ω as worst-case for damping check. · Source ↗
Impedance compatibility

This OTL tube amp's high output impedance (14 Ω) is a good match for the AKG K702's 65 Ω impedance. The impedance ratio (4.7×) falls within the recommended range for high-output-impedance tube sources — a classically well-matched pairing.

Where to buy

Schiit Valhalla 2 on Amazon ↗ AKG K702 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
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JDS Labs Atom Amp 2 Ample 18.6 dB
Topping DX3 Pro+ Ample 16.9 dB
Schiit Magni Heretic Ample 16.4 dB
Little Dot MkII Adequate 4.3 dB
Apple USB-C to 3.5mm Insufficient -0.7 dB

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HeadphoneHeadroom
Sennheiser HD 660S Ample 22.5 dB
Sennheiser HD 800 S Ample 20.6 dB
Philips SHP9500 Ample 13.6 dB
Audeze LCD-2 Classic Ample 13.6 dB
AKG K240 Studio Adequate 3.6 dB
Fostex T50RP Mk3 Marginal 1.7 dB

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