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* Q1 adj. EBITDA 217 mln euros vs 220 mln avg in Rtrs poll
* Investments in broadband roll-out weigh
* Sticks to 2013/14 outlook of 8 pct revenue increase
FRANKFURT, Aug 14 (Reuters) - Kabel Deutschland reported on Wednesday worse-than-expected core profit for itsfiscal first quarter, ending June 30, as extra investments inbroadband and marketing weighed.
The company, which is in the process of being bought byVodafone, reported 3.8 percent higher earnings beforeinterest, taxes, depreciation and amortisation (EBITDA), at 217million euros ($287.23 million).
That was below average analyst expectations of 226 millioneuros in a Reuters poll. It even missed the most pessimisticestimate of 220 million euros.
Revenues rose 4.6 percent to 464 million euros, also belowthe lowest estimate in the poll.
Germany's biggest cable company said it expected its 2013/14revenue to increase by about 8 percent, while the adjustedEBITDA margin is seen at about 48 percent.
"Our broadband products are very popular. That is why we aremaking significant investments in that area," Chief ExecutiveAdrian von Hammerstein said in a statement.
In June, Kabel Deutschland agreed to be bought by Vodafonefor 7.7 billion euros, marking the British company's largestdeal in six years and its second major buy of a Europeanfixedline network in 12 months.
So-called "quad-play" services offering TV, broadband,mobile and fixed-line telephony have caught on in Europeanmarkets.
With consumers wanting to watch TV and video on an array ofdevices, cable assets have become more attractive because theycan provide Internet services at speeds often five times fasterthan competing services from traditional telecom companies.
Kabel Deutschland shareholders can tender their shares untilSept. 11.
Kabel Deutschland's Chief Financial Officer Andreas Siementold reporters he expected competition regulators to have made adecision about the deal in spring next year at the latest.
