Bose 901 Owner's guide

Bose 901 Manual

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  • Bose 901 | Owner's guide - Page 1
    • • INSTALLATION AND OPERATION of the BOSE 901 STEREO SPEAKER SYSTEM
  • Bose 901 | Owner's guide - Page 2
    accurate simulation of live sound. The BOSE 901 Active Equalizer provides unprecedented accuracy and control of frequency response characteristics. Because the BOSE 901 system differs fundamentally from other speaker systems, IT IS IMPORTANT THAT THESE INSTRUCTIONS BE CAREFULLY FOLLOWED. EACH STEP
  • Bose 901 | Owner's guide - Page 3
    nearby walls and re - radiate freely for the best results. 5. The ideal height of the speakers is in the range from 36 to 48 inches off the floor - the height of most musical in- struments during a concert. At a minimum, keep the speakers 12 inches from the floor. FIGURE 1 IV. Connecting
  • Bose 901 | Owner's guide - Page 4
    securely tightened. V. Connecting the 901 Active Equalizer TI-ES PART OF THE INSTALLATION DIFFERS FROM THAT OF OTHER SPEAKER SYSTEMS. FOLLOW THESE INSTRUCTIONS STEP BY STEP. In order to provide proper equalization of the frequency spectrum, the 901 Active Equalizer must be connected between the
  • Bose 901 | Owner's guide - Page 5
    TAPE IN TAPE OUT LEFT 3RIGHT CON E( T IONS 0 TAF4IE RECORDER EQUALIZER EQUALIZER INPUT OUTPUT ) LEFT C t,- ' ( i RIGHT G--) CONNECTIONS Tth [AMPLIFIER C -.45' 03r \-4-step 5 step 6 step 3 Back panel of Equalizer step 4 TAPE z RECORDER RECEIVER OR PREAMPLIFIER Figure 2 •
  • Bose 901 | Owner's guide - Page 6
    or receiver so that the Equalizer will be automatically switched on and off by the power switch on the preamplifier or receiver. THE OUT position. 10. Turn on the entire system except for the Equalizer, which should be turned off. 11. Play your system as you normally would using a phono-
  • Bose 901 | Owner's guide - Page 7
    operating properly. This tests the rest of your system since the Equalizer has not yet been switched into the system. If • you cannot obtain any sound from the speakers, then there is an error elsewhere in your system. Any such errors must be corrected before proceeding further. 12. With the
  • Bose 901 | Owner's guide - Page 8
    Equalizer replaces the TAPE MONITOR switch on the preamplifier or receiver and performs the identical function. Consult your amplifier manual for a description of its use. VI. Alternative Method: Connecting the 901 • Active Equalizer system (except for your power amplifier) as if the Equalizer
  • Bose 901 | Owner's guide - Page 9
    TAPEIN TAPEOUT EQINUPAULTIZER EOQUUTAPLUIZTER C LEFT( LEFT CTAOPNEONERRCEIOITCGNOHSRTTDOOER RIGHT C COANMNPELCIFTIEIORNTSO __6'OSE- step 5 step 6 step 3 step 4 TY Back panel of Equalizer PREAMPI IFIER Figure 3 POWER AMPLIFIER • •
  • Bose 901 | Owner's guide - Page 10
    is now installed in your system. No other connections should be made to the Equalizer. If you have a tape recorder, it is connected to the prearnp in the normal manner described in the preamp and recorder manuals. THE REMAINING STEPS SHOULD BE FOLLOWED TO INSURE PROPER INSTALLATION AND OPERATION
  • Bose 901 | Owner's guide - Page 11
    The 901 Active Equalizer has a TAPE switch which replaces the function of the TAPE MONITOR switch on your preamplifier or re- ceiver if you have connected the Equalizer as described in Section V. (The Equalizer connected to the tape monitor function on your preamp- li fier or receiver.) In
  • Bose 901 | Owner's guide - Page 12
    of the musical scale. It has long been recognized that the better speaker is more sensitive to the quality of program material and the more the TREBLE CONTOUR switch. Unlike ordinary tone controls, the response of the system remains at a fixed level for high frequencies and does not continue to
  • Bose 901 | Owner's guide - Page 13
    db 10 5 5 4 0 3 -5 BELOW 4) DECREA3E TREBLE CONTOUR switch position Z 10 20 50 100 200 500 lkhz 2khz 5khz 10khz 20khz Figure 4. Contours available with the TREBLE LEVEL switch in the normal or dotted position. db 10 • 5 5 0 4 TREBLE CONTOUR 3 -5 switch position -Mr 10 20
  • Bose 901 | Owner's guide - Page 14
    high energy magnets to allow large excursions without audible distortion on any program material. The speakers are acoustically coupled to eliminate audible resonances. Power Handling Capacity. The 901 can be used with any high quality amplifier. Its efficiency enables operation with moderately
  • Bose 901 | Owner's guide - Page 15
    and room acoustics. Installation. The Active Equalizer is easily connected to any preamplifier, amplifier or receiver using the audio cables supplied. Construction. The Active Equalizer contains over one hundred components, including ten transistors, mounted on a military quality circuit board
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•
INSTALLATION
AND
OPERATION
of
the
BOSE
901
STEREO
SPEAKER
SYSTEM
•