Does the Schiit Magnius drive the Sennheiser HD 660S?

Computed from measured specifications · target SPL 110 dB · load 300 Ω

Ample

The Schiit Magnius drives the Sennheiser HD 660S with ample headroom (~18.2 dB headroom at 300 ohms; needs ~4.5 mW, delivers 300 mW).

Headroom
18.2 dB
Required (110 dB SPL)
4.5 mW
Delivered (@ 300 Ω)
300 mW
Required voltage
0.99 Vrms

Power Headroom

Headroom: 18.2 dB 0 · target 18.2 dB below target marginal adequate ample -14 dB +10 +20 +36 dB

Scale shows dB headroom above the 4.5 mW required to reach 110 dB SPL. Amp delivers 300 mW at 300 Ω (+18.2 dB above target).

Sennheiser HD 660S Dynamic · over-ear
Impedance (rated) 150 Ω
Impedance (measured) Source: reference-audio-analyzer.pro/en/r… 216.75 Ω measured
Sensitivity (rated) 104.0 dB/mW
Sensitivity (measured) 103.45 dB/mW measured
Driver Dynamic
Spec basis Measured
Measured by Reference Audio Analyzer (https://reference-audio-analyzer.pro/en/report/hp/sennheiser-hd-660s.php) · Source ↗
Schiit Magnius Desktop Ss · Single Ended
Output impedance manufacturer 0.1 Ω
Power @ 32 Ω 2000 mW
Power @ 300 Ω 300 mW
Power @ 600 Ω 150 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 Magnius SE output: 2000 mW @ 32 Ω, 300 mW @ 300 Ω (both at 1% THD, per Schiit spec). Balanced output is substantially higher. 600 Ω derived from 300 Ω voltage ceiling. · Source ↗

Where to buy

Schiit Magnius on Amazon ↗ Sennheiser HD 660S 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.

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