5 : W a l l M o u n t i n g
Each HTS loudspeaker is equipped with “keyhole” fixing plates as
shown in Fig 3. A soft/compressible 90 degree gasket is posi-
tioned on each corner to ensure positive, vibration free contact
with the wall.
Use the template provided to mark the appropriate fixing
locations on the wall. All HTS loudspeakers are heavy, therefore
it is imperative that the wall construction is appropriate and
suitable fixings capable of holding the weight of the loudspeaker
plus a safety factor of no less than 10:1 are used.
The weights of each loudspeaker are as follows:
HTS7
8kgs (17.6lbs)
HTS7C
8kgs (17.6lbs)
HTS11
11kgs (24.3lbs)
HTS11C
11kgs (24.3lbs)
HTS40
23kgs (50.7lbs)
0.47in
12.00mm
0.20in
5.00mm
Fig. 3
“Keyhole” fixing for wall mounting
6 : A m p l i f i c a t i o n
The choice of partnering amplifier for the monitors will have
significant influence on the performance of the system.
Consider the following when selecting the amplifier:
n
With any passive loudspeaker there is a trade off between low
frequency extension and sensitivity. These monitor’s extended
low frequency response means the sensitivity is relatively low.
It is therefore advisable to select a power amplifier of relatively
high power output capabilities. Typically, best performance comes
with use of amplifiers capable of >150W continuous into 8
ohms.
n
Use of an underpowered amplifier will result in the premature
distortion of the system and increased risk of damage due to
voice coil overheating
n
Valve or solid state amplifiers with high output impedances
should be auditioned carefully, to establish that their
characteristic reduced damping factor at low frequencies
is acceptable.
7 : L i s t e n i n g
The ear and brain tend to interpret distorted sound as loudness
and thus underestimate the actual level of undistorted sound.
The HTS range of loudspeakers, like all ATC monitors,
demonstrate very much lower levels of distortion than
conventional systems of a similar size. It is therefore advisable
to begin listening at an artificially low level and carefully increase
the volume. It is also possible for the loudspeakers to produce
sufficient sound pressure levels for your ears themselves to
become a source of distortion and make the sound appear
harsh. Any audible distortion indicates that either the system
or your ears are being overloaded and that volumes should
be reduced.
8 : C a r e & M a i n t e n a n c e
High technology material finishes are used in this product.
The surfaces are durable and with a little care can be kept as
good as new even under conditions of heavy use. Normally, a
dry duster will be all that is required to keep the finishes clean.
Heavy soiling can be cleaned using a cloth slightly moistened
with a non-abrasive household cleaner.
There are no components within the speakers that can be
considered expendable, or that would benefit from regular main-
tenance. There is no requirement for any kind of routine service
work and there is no schedule for preventative maintenance.
There are no user-replaceable parts within the speaker and, in
the unfortunate event of any malfunction, repair should be
referred to either the supplying dealer or consultant, the relevant
importer, or ATC.
ATC has every confidence in the quality of each product that
it manufactures.