Operation Manual

REL Acoustics ‘ST III’ User Manual

RUNNING IN

Care taken over running in will be rewarded by many years of pleasurable use. Both the

electronics and the drive unit will benefit from an initial period of carefully controlled use.

Possible damage may be sustained by running in the unit at too high a volume setting over an

extended period. On the other hand, by taking a little care over this initial period, about 24

hours of actual use, a longer life with a higher potential eventual performance is assured.

OVERLOAD PROTECTION

REL Sub-Bass Systems are designed as true sub-bass speakers. They are designed to

reproduce those exceptionally deep notes that are felt rather than heard. This they will

attempt to do at whatever volume level you set. If set too high no damage should result

because the built-in electronics will limit the cone movement. This electronic control is called

Set-Safe®. It constantly and instantaneously monitors the output from the power amplifier

and is totally transparent in operation until required. This means it has absolutely no effect on

the sound quality of any REL Sub-Bass System until an overload is detected. Ordinarily an

overload would cause the power amplifier to go into clipping with resultant loss of control over

the drive unit. Apart from being sonically offensive, this can cause drive unit damage. Set-

Safe® detects the point of incipient clipping and reduces the signal level to ensure actual

clipping does not occur.

Even without Set-Safe® overload would be a difficult thing to achieve because REL Sub-bass

Systems have particularly high current amplifiers and very powerful drive units specifically

designed for high sound pressure levels.

From our tests, we believe it would be very difficult to deliberately damage a REL Sub-bass

System. Nevertheless, anything can be damaged if sufficient effort is made. Although

everything possible has been done to minimise damage from moderate attempts at

overloading, there can be no defence against those individuals who deliberately and

perversely abuse the device. Such damage is NOT covered by Warranty. Please remember,

a REL Sub-Bass System is there to supplement your main system, not to overwhelm it!

CARE AND POLISHING

Grittex (sprayed) finishes:

These are best maintained by careful dusting with a lint free cloth. Alternatively, a soft

bristled brush may be used to sweep off any dust failing on the surface. If objects are to be

placed upon the top, it is advisable to use a small mat to protect the surface and to avoid the

risk of rattles.

Wood veneer finishes:

Dusting as above, plus the occasional polishing with a good quality furniture polish for the

wood veneers. Treat the finish as you would any other piece of quality furniture in your home.