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” When I was confident that the R400b could perform well in my reference multichannel system, I hooked it up to a two-channel system via the preamplifier outputs of a NuPrime IDA-8 integrated amplifier-DAC that powered a pair of Definitive Technology StudioMonitor 45 bookshelf speakers. I was able to get a smooth transition from sub to satellites with only some relatively simple fine-tuning of the subwoofer’s controls and minor adjustments to placement, so that the bass was now evenly distributed between the two speakers and throughout the room.”