This page does not review anything SMSL 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 |
|---|---|---|---|
| SMSL HO100 | 1.5 W | <0.1 Ω | 1.3 µV |
| SMSL C200 | 1.3 W | not published | not published |
| SMSL SH-9 | 3.0 W | <0.1 Ω | 1.5 µV |
| SMSL H300 | 5.0 W | <0.1 Ω | not published |
| SMSL HO200 | 3.0 W | <0.1 Ω | 1.0 µV |
| SMSL H200 | 2.0 W | <0.1 Ω | not published |
| SMSL DO400 | 3.0 W | <0.1 Ω | not published |
| SMSL SP400 | 3.0 W | <0.1 Ω | 1.9 µV |
| SMSL H400 MK2 | 2.5 W | <0.1 Ω | not published |
| SMSL SH-X | 5.5 W | <0.1 Ω | not published |
| SMSL VMV P2 MK2 | 2.0 W | <0.1 Ω | not published |
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.
SMSL publishes a power figure at a stated load on 11 of 11, output impedance on 10, a noise figure on 4. Of the 44 power figures this site displays for them at 32, 150, 300 and 600 Ω: 27 printed by SMSL at that exact load, 17 worked out by holding output voltage steady across loads.
Most of what this site says about SMSL came from them, with the rest derived and labelled as derived.
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.