Does the Drop THX AAA 789 drive the AKG K702?
Computed from measured specifications · target SPL 110 dB · load 32 Ω
Verdict
AmpleThe Drop THX AAA 789 drives the AKG K702 with ample headroom (~16.9 dB headroom at 32 ohms; needs ~36.7 mW, delivers 1800 mW).
Headroom
16.9 dB
16.9 dB
Required (110 dB SPL)
36.7 mW
36.7 mW
Delivered (@ 32 Ω)
1800 mW
1800 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 ↗
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
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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 |
| Schiit Magni Heretic | Ample 16.4 dB |
| FiiO K7 | Ample 15.2 dB |
| Little Dot MkII | Adequate 4.3 dB |
| Apple USB-C to 3.5mm | Insufficient -0.7 dB |
Other headphones the Drop THX AAA 789 can drive
| Headphone | Headroom |
|---|---|
| Koss Porta Pro | Ample 28.2 dB |
| Grado SR80x | Ample 27.9 dB |
| HiFiMan Arya | Ample 17.5 dB |
| HiFiMan Edition XS | Ample 16.6 dB |
| Beyerdynamic DT 770 Pro 250 | Adequate 7.5 dB |
| Beyerdynamic DT 990 Pro | Adequate 6.4 dB |