This page does not review anything Grace Design 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 |
|---|---|---|---|
| Grace Design m900 | 1.0 W | 0.08 Ω | 5.01 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.
Grace Design publishes a power figure at a stated load on 1 of 1, output impedance on 1, a noise figure on 1. Of the 4 power figures this site displays for them at 32, 150, 300 and 600 Ω: 3 printed by Grace Design at that exact load, 1 worked out by holding output voltage steady across loads.