This chapter explores minimum-variance behavior beyond the single-speaker response. The combined pattern is a narrowed version of the individual elements and therefore has more depth for a given width. Point source arrays create radial extension by fusing speakers at their angular edges. Spectral variation for a single full-range speaker is a fixed parameter. Phase-aligned spatial crossovers cannot eliminate ripple variance over the space. The symmetric coupled point source can provide curved lines of equal level radiating outward from the virtual point source. The combined shape of the uncoupled line source is a lateral extension characterized as side-by-side stacking of the individual Forward aspect ratio (FAR) shapes. The coupled line source contains an unlimited quantity of speakers at the most limited number of angles. The futility of attempting to use quantity to reduce the spectral variance of proportional beamwidth speakers. Multiple unit arrays can be configured as a line source/point source hybrid.