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AUDIO PRECISION 1037CANEC
LEVEL(dBr)
dBr
90
85
80
BASS TILT
90
85
80
BASS LEVEL
90
85
80
BASS ROLL-OFF
20
50
100
200
Figure 7: The curves above show the effect of the 'bass', 'mid' and
'treble' level controls, and the 'bass tilt' and 'bass roll-off' controls
on the free field response of the HT312A, measured at 2 m.
AUDIO PRECISION 1037CANEC
LEVEL(dBr)
dBr
95
90
85
80
75
70
100
65
95
90
85
20
50
100
200
Figure 9: The upper curve group shows the horizontal directivity
characteristics of the HT312A in its vertical configuration
measured at 2 m. The lower curve is a 1/6 octave power
response measurement, derived from 144 individual directivity
measurements.
Safety considerations
Although the HT312A and HT315A loud-
speakers have been designed in accordance
with international safety standards, to ensure
safe operation and to maintain the instrument
under safe operating conditions, the following
warnings and cautions must be observed:
1. Servicing and adjustment must only
be performed by qualified service
personnel. The amplifier must not be
opened.
2. Do not use the loudspeakers with an
unearthed mains cable or unearthed
mains connection as this may lead to
personal injury.
3. These loudspeakers are capable of
producing sound pressure levels in
vs
FREQ(Hz)
04 OCT 02
TREBLE LEVEL
MIDRANGE LEVEL
500
1k
2k
5k
10k
20k
Hz
vs
FREQ(Hz)
04 0CT 02
0
15
30
45
500
1k
2k
5k
10k
20k
Hz
excess of 85 dB, which may cause
permanent hearing damage.
4. Free flow of air around the amplifier is
necessary to maintain sufficient cooling.
Do not obstruct airflow around the
amplifier
5. To prevent fire or electric shock, do not
expose the unit to water or moisture. Do
not place any objects filled with liquid,
such as vases on or near the
loudspeaker or the amplifier.
6. Note that the amplifier is not completely
disconnected from the AC mains
service unless the mains cable
is removed from the amplifier or the
mains outlet.
Guarantee
This product is supplied with one year guar-
antee against manufacturing faults or defects
AUDIO PRECISION 1038BANEC
LEVEL(dBr)
dBr
90
85
80
BASS TILT
90
85
80
BASS LEVEL
90
85
80
BASS ROLL-OFF
MIDRANGE LEVEL
100
20
50
200
500
Figure 8: The curves above show the effect of the 'bass', 'mid' and
'treble' level controls, and the 'bass tilt' and 'bass roll-off' controls
on the free field response of the HT315A, measured at 2 m.
AUDIO PRECISION 1038BANEC
LEVEL(dBr)
dBr
95
90
85
80
75
70
100
65
95
90
85
20
50
100
200
500
Figure 10: The upper curve group shows the horizontal directivity
characteristics of the HT315A in its vertical configuration
measured at 2 m. The lower curve is a 1/6 octave power
response measurement, derived from 144 individual directivity
measurements.
that might alter its performance. Refer to sup-
plier for full sales and guarantee terms.
HT312A Accessories
Handles
Protective grille
Rack adapter
* Factory installed option only
HT315A Accessories
Handles
Protective grille
Rack adapter
* Factory installed option only
vs
FREQ(Hz)
16 APR 02
TREBLE LEVEL
1k
2k
5k
10k
20k
Hz
vs
FREQ(Hz)
16 APR 02
0°
15°
30°
45°
1k
2k
5k
10k
20k
Hz
Order code
1001-406*
1037-409
1037-412
Order code
1001-406*
1038-409
1038-421
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