This page does not review anything JDS Labs makes. It counts one thing: how much of what this database says about their products came out of their own documents, and how much had to be worked out or left blank.
| Product | Into 32Ω | Output impedance | Output noise |
|---|---|---|---|
| JDS Labs Atom+ (2nd gen) | 1.0 W | 0.7 Ω | 1.99 µV |
| JDS Labs Atom Amp 2 | 2.6 W | 0.7 Ω | 1.33 µV |
| JDS Labs Element III MK2 | 1.3 W | 0.7 Ω | 1.5 µV |
| JDS Labs Element IV | 3.2 W | 1 Ω | 2 µV |
Power decides whether it gets loud enough, output impedance decides whether it tilts the response of a multi-driver in-ear, and the noise figure decides whether you hear hiss with sensitive ones. All three fit on one line of a spec sheet; most of the industry prints one of them.
JDS Labs publishes a power figure at a stated load on 4 of 4, output impedance on 4, a noise figure on 4. Of the 16 power figures this site displays for them at 32, 150, 300 and 600 Ω: 11 printed by JDS Labs at that exact load, 5 worked out by holding output voltage steady across loads.
Almost everything this site says about JDS Labs came from them. That is not the normal case and it is worth saying out loud.
The rule used here is the same for every maker and is described on the manufacturer index. Every figure behind it can be opened on the product page it came from, with the document it came from linked.