Bose 901 Series IV Owner's guide - Page 9
Equalizer, Erv.,2a, Control, Amplifier
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THE FOLLOWING STEPS ARE PROVIDED TO ENSURE THAT THE EQUALIZER IS PROPERLY CONNECTED TO YOUR HIGH-FIDELITY SYSTEM. h. Place the TAPE switch of the equalizer in the MONITOR position. As you slide the LOW and HIGH FREQUENCY SOURCE AND ROOM COMPENSATION controls from one extreme to the other, you will find a detent in the middle of the control's travel. Place both the LOW and HIGH FREQUENCY SOURCE AND ROOM COMPENSATION controls at this position. Set the LOW FILTER control in the "out" position. i. Place the TAPE MONITOR or TAPE FUNCTION switch of your control amplifier in the NORMAL or OUT position. j. Turn your system on. (Be certain that the equalizer is plugged into the switched ac outlet of your control am- plifier and observe that the pilot light on the equalizer is on.) SKVI1g," 'erv.,2A r EQUALIZER AMPLIFIER CONNECTIONS - I TAPE RECORDER CONNECTIONS L A t A L R - L1 OO Ant L- OOi MON REG R L A L TAPE CONTROL AMPLIFIER Figvia 4 k. Play the entire system as you normally would, using a record player or AM/FM source to be sure it is operating properly. (Do not use a tape recorder for this portion of the test.) I. Turn the BALANCE control of the control amplifier to the extreme left and right to check for proper connection of the left and right channels. (If the channels are reversed, check your amplifier or speaker connections carefully.) You have now tested the amplifier, wiring, and speaker systems, but not the equalizer, as it is not yet switched into the system. If your system is not functioning at this point, please go back and check all connections, as any errors in connection of your system must be corrected before proceeding further. m. With the system now playing, turn the TAPE MONITOR or TAPE FUNCTION switch on your control amplifier to the MONITOR or ON position. The sound should stop. If the sound does not stop, recheck Steps "a" through "l." n. Now, place the equalizer TAPE switch in the NORMAL position. The sound should now return. If the sound does not return and the equalizer pilot light is on, then the equalizer is probably connected incorrectly. Recheck Steps "a" through "I." NOTE 1: THE TAPE MONITOR OF YOUR CONTROL AMPLIFIER MUST BE LEFT "ON" FOR THE ACTIVE EQUALIZER TO BE IN THE CIRCUIT. CHECK THE TAPE MONITOR SWITCH PERIODICALLY TO MAKE CERTAIN IT IS IN THE "ON" POSITION. NOTE 2: THE 901 SERIES IV AND III EQUALIZERS ARE NOT COMPATIBLE WITH THE 901 SERIES I AND II SPEAKER SYSTEMS. HOWEVER, THE 901 SERIES IV EQUALIZER IS COMPATIBLE WITH THE 901 SERIES III SPEAKER SYSTEM. 9