ATC HTS7 Instruction Download Page 3

1 : S a f e t y   W a r n i n g s

1.  Read instructions – all the safety and operating instructions 

should be read before the appliance is operated. 

2.  Retain these instructions – the safety and operating 

instructions should be retained for future reference.

3.  Follow instructions – all operating and other instructions 

should be followed. 

4.  Water and moisture - the appliance should not be exposed 

to dripping or splashing and no objects such as vases, 

should be placed on the appliance.

5.  Heat – the appliance should be situated away from heat 

sources such as radiators, stoves or other appliances that 

produce heat.

6.  Cleaning – the appliance should be cleaned only as 

recommended by the manufacturer.

7.  Servicing – the user should not attempt to service the 

appliance beyond those measures described in the operating 

instructions. All other servicing should be referred to 

qualified service personnel.

2 : U n p a c k i n g & H a n d l i n g

1.  All loudspeakers in the HTS range are heavy items and 

should be handled with care. Unpacking should be carried 

out by two people either on the floor or a large low table, 

with adequate open space around the carton, preferably 

close to their final position.

2. Open the carton and remove all loose items, leaving the 

packing foam in place.

3. Up-end the carton so the open end is facing down.

4. Lift the carton off the contents (speaker & foam ‘end-caps’).

5. Lift the upper foam end cap off.

6. Lift each loudspeaker out of the foam end cap. 

3 : M o n i t o r   P l a c e m e n t

The subjective performance of any loudspeaker will be 

influenced by the acoustic character of the room in which it is

used and its position within the room. A mixture of carpets, 

curtains and soft furnishings will help ensure that the middle and

high frequencies are reasonably well controlled. 

When a loudspeaker is wall mounted a proportion of the low

frequency energy which is normally radiated towards the rear is

sent forward, resulting in a boost to lower frequencies. In most

cases the additional bass energy can overwhelm the system and

degrade performance. The HTS range of loudspeakers address

this issue through carefully optimised crossovers designed to

compensate for the wall loading effect. 

For the best performance the loudspeakers should be mounted

directly on to the wall allowing at least 1.5m between the loud-

speaker and any side walls.

Stereo Speaker Placement

For stereo listening, loudspeakers should be positioned so 

they form an equilateral triangle with the listening position 

(See Fig. 1). The loudspeaker height requirements are explained

later in this section.

Centre Speaker Placement

The positioning constraints on a centre channel loudspeaker 

are always influenced by the type and location of the associated

screen. However, the basic parameters that influence the 

subjective performance of any loudspeaker in a listening room 

as described above, should be taken in to account. 

The HTS7C, HTS11C and HTS40 (horizontal configuration) are

intended to be positioned either just below or just above the

screen. 

While every ATC centre channel speaker is effectively magneti-

cally shielded, the extreme sensitivity of some CRT tubes to

residual levels of magnetic flux may mean that, in rare cases, 

ATC centre channel speakers are not appropriate. Adjusting the

relative position of the centre speaker and the CRT can reduce

magnetic interference but should your screen suffer intractable

picture distortion caused by the proximity of a centre speaker

contact your dealer or installer for advice.

30°

30°

distance x

distance y

distance z

distance x = distance y = distance z

Loudspeaker Positioning - Stereo

Fig. 1

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