Support · keep the instruments free

Every test on this site is free, with no account and no paywalled downloads. Two things keep it that way.

Affiliate disclosure

Some outbound gear links are affiliate links marked withrel="sponsored". If you buy through one, the retailer may pay this site a small commission at no extra cost to you. Affiliate status never changes a measurement, a verdict, or a recommendation — the instruments report what they measure.

Spread honest measurement

The most useful support is linking to a tool that helped you and telling us what was wrong via the contact page. Corrections from listeners with real gear make every tool better.