Patent ID: 7566226

Claim:
An adjustable terminal, manually adjustable to select one particular electrical coupling from among at least three possible electrical couplings of leads from at least one amplifier to leads going to at least two speakers, said adjustable terminal comprising: a. at least one terminal base, further comprising: i. at least four input terminals; ii. at least four output terminals each electrically coupled to only one input terminal of said at least four input terminals; iii. at least four electrical contacts each electrically coupled between only one input terminal of said at least four input terminals and only one output terminal of said at least four output terminals; and b. a plurality of mechanically coupled jumpers, wherein each jumper of said plurality of mechanically coupled jumpers is operable to connect at least two electrical contacts of said at least four electrical contacts, c. wherein said plurality of mechanically coupled jumpers is manually operable to be moved to various positions, each position of said various positions corresponding to one of various particular relationships between said plurality of jumpers and said at least four electrical contacts and further corresponding to one of various particular electrical couplings between said at least four input terminals and said at least four output terminals.