Check the listing for details. ESX QE812SP Digital Full HD Audio Player 12-Channel DSP Sound Processor. Condition: New. Listed at 1869.48 USD. With the two brand new processors QL810SP and QL812SP, ESX shows what real high-end DSPs can achieve. The equipment itself is of the finest quality: not only are elegant 32-bit converters from AKM's 5 series installed, but two of the ADAU1452 and therefore the best processors from Analog Devices are used. This is exactly where the wheat is separated from the chaff: Conventional DSPs usually only have one DSP core. However, if a DSP has many channels and corresponding equipment, computing power becomes scarce. Not so with the new ESX top models, on the contrary. The two QL DSPs have so much reserve that they can easily process not only 12 channels, but in addition to numerous functions, the developers also implemented the revolutionary ESX Expert Staging Equalizer with balance and level fun.