Cloney Audio, the Blackrock based hi-fi specialist, is determined to kit out as many homes as possible with super-slender speakers and flat "hang-on-the-wall" televisions this Christmas. It is holding an exhibition of the latest, equipment at the Burlington Hotel this weekend. Dolby digital sound will be demonstrated in several rooms and movie disc technology will be available from Phillips. Opening hours on Saturday and Sunday are from 10 a.m. to 6 p.m.