Two & four-way switch boxes connecting a stereo power amplifier to up to four pairs of speakers as required. In the 2-way version up to two pairs of speakers can be connected to the amplifiers output either separately or simultaneously provided the amplifier is able to drive two loads at once e.g. down to 4andohm so that 8andohm 2 is acceptable. In the 4-way version up to four pairs of speakers can be connected. Switching is by rocker switches on a sloping front panel. Speaker connections are via spring-loaded terminals.