The 74-staff company, which specialises in cross-media marketing and data-driven direct mail, invested in the machine in order to develop the continuous form arm of its business.
Managing director David Laybourne said the system had "cut down time to market" with certain jobs, and claimed the group can sometimes take days off jobs.
The Xerox machine offers a cycle speed of 5,486 metres per hour and has helped boost the productivity of form printing at the business.
Laybourne said: "It's proving to be 50% more productive than the previous 525 setup we had in place and, over the course of printing half a million forms, it makes quite a difference."
He added: "We're very pleased with the machine, it's definitely performing to expectation and there was no teething period."
The digital printer, which is on course for an £11m turnover, has also just completed a 10.5m drop print run, the equivalent of 21m A4 sheets, using the new dual-line Xerox machine.
The X1300 incorporates flash-fusing technology, a non-contact fusing process that uses neither heat or pressure, and replaces a Xerox DocuPrint 525, which was the company's first foray into continuous form printing.
Peter Rivett, founder and chairman of Real Digital, said the non-contact flash fusing "broadens the range and type of substrates that we can personalise, and the print quality is superb".
He added: "Although it's early days, it's given us a great capacity and we're putting through some very large runs."
Croydon-based Real Digital also recently installed a Hunkeler delivery system, which consists of UW6 paper unwinders and CS6 double-cut sheeters.
The system, which complements the new Xerox X1300, utilises 28in stackers that can also complete inline folding when needed.
Rivett said: "The ability to cut and fold inline is fundamental to managing costs and timescales."
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