(19)

(11)

EP 0 953 226 A2

(12)

(43) Date of publication: 03.11.1999 Bulletin 1999/44 (21) Application number: 98901809.0 (22) Date of filing: 15.01.1998

(51) International Patent Classification (IPC):  H03H 17/ 00( . ) H04H 60/ 04( . ) (86) International application number: PCT/US1998/000689 (87) International publication number: WO 1998/032223 (23.07.1998 Gazette 1998/29)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 15.01.1997 US 19970035520 (71) Applicant: Mackie Designs Inc. Woodinville, WA 98072 (US)	(72) Inventors: MACKIE, Greg, C. Kirkland, WA 98034 (US) WATTS, Peter, F. Bothell, WA 98011 (US) TUDOR, Robert, J. Snohomish, WA 98290 (US) (74) Representative: Vossius, Volker, Dr., et al  Dr. Volker Vossius, Patentanwaltskanzlei - Rechtsanwaltskanzlei, Holbeinstrasse 5 81679 München 81679 München (DE)