Dom7 Full Voicing

R – ♭7 – 3 – 5

Prove it — just do the practice exercise.
C7 Full Voicing
C (R)Bb (♭7)E (3)G (5)
Full Voicing for Dominant 7:

• R – ♭7 – 3 – 5

The whole step between root and minor 7th sounds more open than Maj7.

Example: C7 Full = C + Bb + E + G