7Hz: what they publish

This page does not review anything 7Hz 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.

Impedance is almost always printed. Sensitivity is the one that goes wrong, because a decibel figure means two very different things depending on whether it is per milliwatt or per volt — about five decibels apart at 300 Ω and eighteen at 16 Ω. The conversion is here.

• Converted from per volt — 3: the maker prints a figure per volt, converted here with dB/mW = dB/V − 10·log₁₀(1000/Z)
• Unit not stated — 1: the maker prints a decibel figure with no reference unit, so it is shown as printed and flagged rather than quietly converted
• Not published — 1: no sensitivity figure in anything the maker published

Most of what this site says about 7Hz 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.

All 156 manufacturers · What the spec sheets actually say · Download the whole database