Does the JDS Labs Atom Amp 2 drive the Grado SR80x?
Computed from measured specifications · target SPL 110 dB · load 32 Ω
Verdict
AmpleThe JDS Labs Atom Amp 2 drives the Grado SR80x with ample headroom (~29.5 dB headroom at 32 ohms; needs ~3.0 mW, delivers 2650 mW).
Headroom
29.5 dB
29.5 dB
Required (110 dB SPL)
3.0 mW
3.0 mW
Delivered (@ 32 Ω)
2650 mW
2650 mW
Required voltage
0.34 Vrms
0.34 Vrms
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 ↗
JDS Labs Atom Amp 2
Desktop Ss · Single Ended
| Output impedance manufacturer | 0.1 Ω |
| Power @ 32 Ω | 2650 mW |
| Power @ 150 Ω | 570 mW |
| Power @ 300 Ω | 286 mW |
| Power @ 600 Ω | 143 mW |
| Power source | Manufacturer |
JDS Labs product page: 2650/570/286/143 mW at 32/150/300/600 Ω per channel. All published — no derivations. Output impedance <0.1 Ω from manufacturer.
· Source ↗
Where to buy
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Other amplifiers for the Grado SR80x
| Amplifier | Headroom |
|---|---|
| Schiit Lyr 3 | Ample 33.1 dB |
| Schiit Asgard 3 | Ample 30.7 dB |
| Topping DX3 Pro+ | Ample 27.9 dB |
| FiiO K7 | Ample 26.2 dB |
| Little Dot MkII | Ample 15.3 dB |
| Apple USB-C to 3.5mm | Ample 10.2 dB |
Other headphones the JDS Labs Atom Amp 2 can drive
| Headphone | Headroom |
|---|---|
| Koss Porta Pro | Ample 29.8 dB |
| AKG K371 | Ample 29.0 dB |
| AKG K702 | Ample 18.6 dB |
| AKG K712 Pro | Ample 17.2 dB |
| Beyerdynamic DT 770 Pro 250 | Adequate 9.0 dB |
| Beyerdynamic DT 990 Pro | Adequate 7.9 dB |