  We present a novel concept of proportional gas amplification for the read-out
of the spherical proportional counter. The standard single-ball read-out
presents limitations for large diameter spherical detectors and high pressure
operations. We have developed a multi-ball read-out system which consists of
several balls sitting at a fixed distance from the center of the spherical
vessel. Such a module can tune the volume electric field at the desired value
and can also provide detector segmentation with individual ball read-out. In
the latter case the large volume of the vessel becomes a spherical time
projection chamber with 3D capabilities.
