Vi. technical information – Bose Direct / Reflecting 901 Series 4 User Manual
Page 17
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VI. Technical Information
A. SPECIFICATIONS
1. The system is packed In two cartons marked “Part 1”
and “Part 2.“
Shipping Weight: Part 1. 45.5 lbs. Part 2. 43.5 lbs.
Carton Dimensions: 25%" x 16" x
2. The Speaker
Dimensions: 21 " Wide x 12%" High x 13" Deep
Weight: 35 lbs. Impedance: 8 ohms
3. Percentages of Reflected and Direct Sound Radiation
Power radiated by reflection: 89%
Power radiated directly:
il%
4. Power Handling
Minimum Recommended Power:
10 watts rms per channel
at 8 ohms.
Maximum Recommended Power: No power restrictions on
amplifier size when used in non-commercial applications,
providing the fusing recommendations 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 to direct sound and the proper
angles of the reflected sound incident upon the listener.
SPEAKER COMPLEMENT: Nine matched full-range speak
ers, utilizing aluminum helically wound voice coils: linear,
high-excursion
suspension;
low
impedance
(0.9
ohms)
voice coils connected in series.
ENCLOSURE: Acoustic Matrix'^“, utilizing three Reactive Air
Columns
tuned
below
system
resonance
and
partially
isolated
individual
cells
for
each
driver;
air
columns
emerge through rear of speaker cabinet for maximum effi
ciency.
6. The Active Equalizer
TAPE MONITOR SWITCH: Replaces tape monitor switch
on receiver or amplifier when equalizer is connected in
tape monitor circuit.
LOW FILTER CONTROL: Two-position. 5 dB decrease at
40 Hz.
SOURCE AND ROOM COMPENSATION
LOW FREQUENCY CONTROL: Continuously adjustable
slider, ± 8 dB adjustment over band from 100 Hz to 400 Hz.
HIGH FREOUENCY CONTROL: Continuously adjustable
slider, shelving control with range of ±8 dB at 10 kHz.
Dimensions:
Input impedance:
Harmonic distortion:
Noise (“A" weighted):
Minimum load impedance:
Maximum output voltage:
Maximum gain:
2^6* High X SXs' Deep x
Wide
80 kilohms
<0.1% (1.0-volt output)
90 dB below 1 volt
5 kilohms
2.5 volts
21 dB at 16 kHz (center
setting)
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