Improved dual channel amplifier system

Claim 1

AN AUDIO AMPLIFIER SYSTEM COMPRISING FIRST AND SECOND AMPLIFIER CHANNELS, EACH OF SAID AMPLIFIER CHANNELS INCLUDING AT LEAST ONE AMPLIFIER STAGE, MEANS FOR SUPPLYING A SIGNAL FROM A FIRST SOURCE TO THE INPUT OF SAID FIRST AMPLIFIER CHANNEL, MEANS FOR SUPPLYING A SIGNAL FROM A SECOND SOURCE TO THE INPUT OF SAID SECOND AMPLIFIER CHANNEL, A COMMON LOW FREQUENCY OUTPUT TRANSDUCER, MEANS COUPLING THE OUTPUT OF SAID FIRST AND SECOND AMPLIFIER CHANNELS TO SAID COMMON TRANSDUCER FOR LOW FREQUENCY SIGNALS, LOW-PASS SIGNAL COUPLING MEANS HAVING ONE INPUT TERMINAL CONNECTED TO A POINT IN SAID FIRST AMPLIFIER CHANNEL SEPARATED FROM THE INPUT OF SAID FIRST AMPLIFIER CHANNEL BY AT LEAST ONE AMPLIFIER STAGE AND A SECOND TERMINAL CONNECTED TO A POINT IN SAID SECOND AMPLIFIER CHANNEL SEPARATED FROM THE INPUT OF SAID SECOND AMPLIFIER CHANNEL BY AT LEAST ONE AMPLIFIER STAGE AND OUTPUT TERMINALS CONNECTED, RESPECTIVELY, TO THE INPUT OF SAID FIRST AMPLIFIER CHANNEL AND THE INPUT OF SAID SECOND AMPLIFIER CHANNEL, SAID LOW-PASS SIGNAL COUPLING MEANS BEING CONSTRUCTED AND ARRANGED TO CROSS-COUPLE LOW-FREQUENCY SIGNALS ONLY FROM EACH CHANNEL TO THE INPUT OF THE OTHER CHANNEL THEREBY TO TEND TO EQUALIZE THE AMPLITUDE OF THE LOW FREQUENCY SIGNALS PRESENT IN SAID TWO AMPLIFIER CHANNELS.