Embodiments of the invention relate to methods and apparatus for lossless, or low loss, coupling for many channel RF coil arrays. Non-invertible noise can be converted to invertible noise. Specific embodiments pertain to methods and apparatus for magnetic resonance imaging (MRI) with many channel RF coil arrays. Specific embodiments pertain to methods and apparatus for matching one or more preamplifiers to associated coils in an MRI array and tuning the MRI coil array. Embodiments of the invention can incorporate matching of the coil to the impedance of the preamplifier.