If the B&K does not work for you, consider looking at the Emotiva XMC-1 multi-channel preprocessor. This is a *very* capable unit and is only $1995. It can easily compete with units costing $10,00 - $12,000. Plus, it comes with a 30 day in-home trial and a 5 year warranty - w00t!!
https://emotiva.com/products/pres-and-pros/xmc-1
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https://emotiva.com/products/pres-and-pros/xmc-1
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