[en] An intermediate-image magnetic plus Si(Li) combination pair spectrometer featuring an excellent energy resolution and a pair-line efficiency of 10^-3, recently presented and demonstrated, has been made more universally applicable by reducing the background underlying the pair lines. The best background reduction is achieved by using two standard Si(Li) detectors and a sum-coincidence method. An experimental coincidence pair-line efficiency of 2.1x10^-4 for the 1911 keV E0 pair line in ⁶⁴Zn is achieved. In this typical case, the high-energy background (mainly caused by β⁺ activity) is reduced by a factor of about 200 as compared to the direct spectrum of a single detector. (author)