The 6 string Contrabass is normally used in guitar orchestras, classical guitar ensembles, jazz groups, folk groups, and church music groups in much the same way as a standup bass or electric bass.
The nylon string contrabass generates a unique full, resonant, warm sound.
The nylon strings are like the bass strings on a classical guitar in that the core is composed of many thin nylon filaments and then thin silver coated wire is wrapped around the core.
Musicians who are use to playing steel string guitar basses are usually amazed with the warm, full sound of these nylon string contrabass.
All 6 strings are tuned an octave below the standard classical guitar.
With this tuning it is very simple for a player of standard guitar to play the contrabass.