Bose 901 IV Series

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VI. Technical Information
A. SPECIFICATIONS
1. The syslem Is packed in two cartons merited ''Part 1*'
end “Part 2/’
Shippir»g Weigh!: Par! 1, 45 5 l*>S. Part 2. 43 5 lbs.
Carton Dimensioos: 25%* x 16* x 14J^*
2. The Speaker
Dimensions: 21' Wide x 12%' High x )3' Deep
Weight: 35 lbs. Impedance. 8 ohms
3. Percentages of Reflected and Direct Sound Radiation
Power radiated by reflection; 89%
Power radiated directly: 11 %
4. Power Handling
Minimum Recommended Power: 10 waits rma per channel
at 8 ohms
Maximum Recommended Power: No power restrictions on
amplifier size when used in norwcommercial eppiicaiions.
providing the fusing recommendailons are followed.
5. Speaker Configuration
SPATIAL CHARACTERISTICS: Eight speakers reflecting
sound at 30* angles from the wall behind the speaker: one
speaker directed into the listening area to provide the op>
timum ratio of reflected lo direcl sound and the proper
angles of the reflected sound incidem upon the listener.
SPEAKER COMPLEMENT: Nine matched full*range speak¬
ers, utilizing aluminum helically wound voice coils: linear,
high-excufsion suspension, low impedance (0.9 ohms)
voice coils connected in series.
ENCLOSURE: Acoustic Matrix'”, utilizing three Reactive Air
Colurrtns tuned below system resonance and partially
isolated individual cells for each dnver; air columns
emerge through rear of speaker oaDinet for maximum sffi*
ciency.
6. T he Active Equalizer
TAPE MONITOR SWITCH: Replaces tape rnonitof switch
on receiver or amplifiar when equalizer is connected In
tape monitor circuit.
LOW FILTER CONTROL: Two*p08ition» 5 08 decrease at
40 Hz.
SOURCE AND ROOM COMPENSATION
LOW FREQUENCY CONTROL; Continuously adjustable
siWer, ±8 dS adjustment over band from 100 Hz to 400 Hz.
HIGH FREQUENCY CONTROL; Continuously adjustable
slider, shelving control with range of ±6 dB at 10 kHz.
Dimensions;
Input impedance;
Harmonic diatonion:
Noise (“A" weighted):
Minimurn load Impedance:
Maximum output voltage:
Maximum gain:
2%,* High X 5K/ Deep x
ll%-Wide
SO kllohms
<0,1% (1.0«volt output)
90 d6 below 1 volt
5 kllohms
2,5 volts
21 dB at 16 kHz (center
setting)
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