How low is double bass tuned Is it the same oct as a eltric or lower?

The double bass is typically tuned in fourths, with the lowest string tuned to E1 (the lowest note on the piano). This is one octave lower than the lowest note on the electric bass, which is tuned to E2.

*However, some double basses are tuned in fifths, rather than fourths, which makes the lowest string G1.*