Does the Drop THX AAA 789 drive the Audio-Technica ATH-R70x?

Computed from rated specifications · target SPL 110 dB · load 600 Ω

Adequate

The Drop THX AAA 789 adequately drives the Audio-Technica ATH-R70x with limited margin (~8.0 dB headroom at 600 ohms; needs ~15.8 mW, delivers 100 mW).

Headroom
8.0 dB
Required (110 dB SPL)
15.8 mW
Delivered (@ 600 Ω)
100 mW
Required voltage
2.73 Vrms

Power Headroom

Headroom: 8.0 dB 0 · target 8.0 dB below target marginal adequate ample -14 dB +10 +20 +36 dB

Scale shows dB headroom above the 15.8 mW required to reach 110 dB SPL. Amp delivers 100 mW at 600 Ω (+8.0 dB above target).

Audio-Technica ATH-R70x Dynamic · over-ear
Impedance 470.0 Ω rated
Sensitivity 98.0 dB/mW rated
Driver Dynamic
Spec basis Rated
Rated: Audio-Technica official spec (470 Ω, 98 dB/mW at 1 kHz). RAA has no measurement page. · Source ↗
Drop THX AAA 789 Desktop Ss · Single Ended
Output impedance manufacturer 0.1 Ω
Power @ 16 Ω 3000 mW
Power @ 32 Ω 1800 mW
Power @ 300 Ω 200 mW
Power @ 600 Ω 100 mW
Power source Manufacturer
Drop product page SE figures: 3000/1800/200/100 mW at 16/32/300/600 Ω. THX AAA topology, output impedance <0.1 Ω (class spec). · Source ↗

Where to buy

Drop THX AAA 789 on Amazon ↗ Audio-Technica ATH-R70x 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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iFi Zen DAC V2 Marginal 0.6 dB
Apple USB-C to 3.5mm Insufficient -10.0 dB

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