Is the amplifier supplied with the RCA cable and XLR cable so that it can be connected to external Digital to Analog Converter (DAC)?

The Monolith THX AAA 887 does not come with an extra RCA or XLR cable. The cables that we would recommend are to be found on the following links:

Premium 2 RCA Plug/2 RCA Plug M/M 22AWG Cable

XLR Male to XLR Female Cable: XLR Male to XLR Female Cable | Microphone & Interconnect | Gold Plated