Typical turns ratio is about 500 1 to match a nominal 50 kω signal source such as the magnetic pickup of an electric guitar to a 100 ω input.
Active di box vs passive.
Active di units and passive di units.
The most obvious difference is that passive di boxes don t need to be powered.
Passive does not have active electronics and therefore does not require an external power source.
But the differences go deeper than that.
They contain a transformer to perform impedance matching and balancing and very little else the strength and impedance of.
Passive di boxes are basically just transformers.
A passive di unit typically consists of an audio transformer used as a balun.
In contrast active boxes do have active electronics which are powered by external power sources.
The biggest difference between an active di and a passive di is that an active di includes a preamplifier.
Active di boxes require a power source usually batteries or phantom power over an xlr jack.
The most basic definitions of the two different kinds of di boxes are likely what you d expect.