DIFF Subgroup Additional Only
H04R 2201/028 Structural combinations of loudspeakers with built-in power amplifiers, e.g. in the same acoustic enclosure (H04R2499/10 takes precedence; Single (sub)woofer with two or more satellite loudspeakers for mid- and high-frequency band reproduction driven via the (sub)woofer H04R2205/026)
Full Title
Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups > Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups > Structural combinations of loudspeakers with built-in power amplifiers, e.g. in the same acoustic enclosure (H04R2499/10 takes precedence; Single (sub)woofer with two or more satellite loudspeakers for mid- and high-frequency band reproduction driven via the (sub)woofer H04R2205/026)