The S4 is likewise fully Bi-polar. The precise and particularly linear bass range (down to 28Hz!) owes to the S6' Bi-polar concept.
With the S4 the belated extension to the ROWEN Bi-Active-technology is possible. The increase of dynamics and detail fidelity delivers musicality and the character of a live performance even more clearly. With an increasing listening experience and the requirements grown accordingly you can let the ROWEN Loudspeakers gradually grow along.