Bose 901 Series IV Owner's guide - Page 10

Installation 2. Using Separate Components, Connecting Between the Preamp and the Amplifier The equalizer can be connected between separate preamplifier and power amplifier units (see Figure 5). This connection method provides complete flexibility of the preamplifier tape monitor functions for use with one or two tape recorders in the conventional manner. The disadvantage of this connection method involves using conventional loudspeakers and headphones because the equalizer is permanently wired into the circuit. (See SECTION IV.) If you do connect the equalizer in this manner, it is suggested that the gain controls of your power amplifier be reduced slightly from fully clockwise for optimum system noise (consult your amplifier owner's manual for further recommendations). 3. Using the Preamp•Out/Main-ln Circuit An alternate method of connecting the BOSE Active Equalizer makes use of the PREAMP-OUT and MAIN-IN jacks provided by many manufacturers on their receivers or integrated amplifiers (see Figure 6). Using the PREAMP-OUT/ MAIN-1N connection jacks retains the total flexibility of the tape monitor circuitry. However, this method of connection permanently connects the equalizer in the circuit; this may prove inconvenient if you are using conventional speakers or headphones. (See SECTION IV.) Due to the circuitry characteristics of some receivers, the equalizer may not function if connected to these jacks. Also, system noise may increase slightly due to the connection of the equalizer immediately before the power amplifier input. EQUALIZER AMPLIFIER n CONNECTIONS TAPE RECORDER CONNECTIONS II rT , C) 0 A. L CD A L R L SEM O O ORM O O •-• eX. 12/ / c:S2- t• cr. MAIN-AMPLIFIER 10 Cassonsf INPUT 74RM/ISIIINMWRIM/0 R OUTPUT Figure 5 PREAMPLIFIER