Multi-channel phased array coils facilitate acquisition of fast, localized, and high signal-to-noise ratio (SNR) magnetic resonance spectroscopy (MRS) data. As individual spectra are acquired from multiple coil channels, it is necessary to combine these data to form a final spectrum. Here, we present an improved approach for combining multi-channel phased array data using spectral windowing followed by a rank-R singular value decomposition (SVD). Our approach, termed ‘OpTIMUS’ was evaluated using SNR and compared to combination methods including whitened SVD (WSVD), S/N2 weighting, and the vendor-supplied reconstruction. OpTIMUS generated the highest SNR across all methods.