Italian manufacturer Sonum introduces two 8 and 16-channel summing mixers in API 500 format, called SUM.
The SUM 8 summing mixer provides 8 channels, while the SUM 16 can sum up to 16 channels. Each module is also equipped with a headphone output, mono/stereo switches for each pair of channels, and an automatic -3dB pad in stereo mode.
Both SUM modules are made in Italy, their prices have not been announced yet. You'll find more details soon at www.sonum.it.