Does the Drop THX AAA 789 drive the Sony MDR-7506?
Computed from measured specifications · target SPL 110 dB · load 32 Ω
Verdict
AmpleThe Drop THX AAA 789 drives the Sony MDR-7506 with ample headroom (~26.2 dB headroom at 32 ohms; needs ~4.4 mW, delivers 1800 mW).
Headroom
26.2 dB
26.2 dB
Required (110 dB SPL)
4.4 mW
4.4 mW
Delivered (@ 32 Ω)
1800 mW
1800 mW
Required voltage
0.61 Vrms
0.61 Vrms
Sony MDR-7506
Dynamic · over-ear
| Impedance (rated) | 63 Ω |
| Impedance (measured) Source: reference-audio-analyzer.pro/en/r… | 84.5 Ω measured |
| Sensitivity (rated) | 106.0 dB/mW |
| Sensitivity (measured) | 103.6 dB/mW measured |
| Driver | Dynamic |
| Spec basis | Measured |
Measured by Reference Audio Analyzer (https://reference-audio-analyzer.pro/en/report/hp/sony-mdr-7506.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 Sony MDR-7506
| Amplifier | Headroom |
|---|---|
| Schiit Lyr 3 | Ample 31.4 dB |
| JDS Labs Atom Amp 2 | Ample 27.8 dB |
| Schiit Magni Heretic | Ample 25.6 dB |
| FiiO K7 | Ample 24.5 dB |
| Schiit Fulla 4 | Ample 15.4 dB |
| Apple USB-C to 3.5mm | Adequate 8.5 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 |
| AKG K702 | Ample 16.9 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 |