Safety considerations
Although the HT312B and HT315B loudspeak-
ers have been designed in accordance with
international safety standards, to ensure safe
operation and to maintain the instrument under
safe operating conditions, the warnings and
cautions listed overleaf 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
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 HT312B, measured at 2 m.
Figure 9: The upper curve group shows the horizontal directivity
characteristics of the HT312B 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.
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 HT315B, measured at 2 m.
Figure 10: The upper curve group shows the horizontal directivity
characteristics of the HT315B 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.
producing sound pressure levels in
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
These products are supplied with two year
guarantee against manufacturing faults or
defects that might alter their performance.
Refer to supplier for full sales and guarantee
terms.
