Does the FiiO K7 drive the Grado SR80x?

Computed from measured specifications · target SPL 110 dB · load 32 Ω

Ample

The FiiO K7 drives the Grado SR80x with ample headroom (~26.2 dB headroom at 32 ohms; needs ~3.0 mW, delivers 1220 mW).

Headroom
26.2 dB
Required (110 dB SPL)
3.0 mW
Delivered (@ 32 Ω)
1220 mW
Required voltage
0.34 Vrms

Power Headroom

Headroom: 26.2 dB 0 · target 26.2 dB below target marginal adequate ample -14 dB +10 +20 +36 dB

Scale shows dB headroom above the 3.0 mW required to reach 110 dB SPL. Amp delivers 1220 mW at 32 Ω (+26.2 dB above target).

Grado SR80x Dynamic · on-ear
Impedance (rated) 32 Ω
Impedance (measured) Source: reference-audio-analyzer.pro/en/r… 38.8 Ω measured
Sensitivity (rated) 99.8 dB/mW
Sensitivity (measured) 105.3 dB/mW measured
Driver Dynamic
Spec basis Measured
Measured by Reference Audio Analyzer (https://reference-audio-analyzer.pro/en/report/hp/grado-sr80x.php) · Source ↗
FiiO K7 Dac Amp · Single Ended
Output impedance manufacturer 1.0 Ω
Power @ 32 Ω 1220 mW
Power @ 300 Ω 140 mW
Power @ 600 Ω 70 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.
FiiO K7 SE headphone output from manufacturer spec page (fiio.com/k7_parameters): L+R ≥ 1220 mW+1220 mW @ 32 Ω, L+R ≥ 140 mW+140 mW @ 300 Ω (THD+N<1%). Output impedance <1 Ω @ 32 Ω from manufacturer. 600 Ω derived from 300 Ω. · Source ↗

Where to buy

FiiO K7 on Amazon ↗ Grado SR80x 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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