Manual REL Acoustics ST III (page 20 of 27) (English)

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REL Acoustics ‘ST III’ User Manual

Note: As the Q-series crossover adjustment uses a single variable control, use the closest

correlating position to any of the crossover settings noted above for ST series models.

Ultimately, as with the click stops of the ST range, simply bring gain and then crossover up

until excess output is achieved, then back down a soft-click or two.

Hint: There is a tendency among audiophiles to set the crossover point too high and

the gain too low when first learning how to integrate a REL with the system, the fear

being one of overwhelming the main speakers with bass. But in doing so, the

resulting set-up will be lacking in bass depth and dynamics. The proper crossover

point and gain setting will increase overall dynamics, allow for extended bass

frequencies, and improve soundstage properties. Note, gain must be adjusted in

conjunction with crossover changes. In general, when selecting a lower crossover

point, more gain may need to be applied.

Theatre and Film Applications: For Dolby Digital AC-3 or other 5.1 theatre systems, once

the standard set-up for two-channel outlined above is complete, the LFE output from the

processor or receiver should be connected to the low-level input and appropriate gain

adjustments made. It may be necessary to take the crossover out of the low-level input using

the “mode” switch if extra upper bass output is called for. Keep phase consistent with what

was selected during high-level set-up by simply choosing the corresponding setting (1 = 2, 3 =

4). For this configuration, you must set the processor to the “large” or “full range” setting for

the left and right speakers in order for the REL to receive the bass signal via the high-level

cable. In this configuration, the REL provides support for both the left and right speakers for

two-channel listening, and support for the LFE when movies are playing. Most processors will

allow you to defeat the subwoofer output when listening in the two-channel mode. The effect

of this set-up is one of greatly increased dynamics in the mid-bass range; no bass bloat; and

a greater degree of space and timing from the Foley effects. For an even greater sense of

space and impact, a second woofer connected in parallel to the centre channel will prove to

be a dramatic improvement as well. And if that is not enough fun, a rear sub, both to support

the rear channel speakers as well as to evenly distribute LFE through the room, truly

completes the full-range sonic picture for state-of-the-art film reproduction. A comprehensive

set-up paper for home theatre will be coming very soon.

Other Tips: Generally speaking, do not use the supplied spikes. RELs work on the principle of

the driver in a high-pressure zone relative to the floor. Spiking the REL will decouple the

woofer from the floor, which will lean out the bass response. If the floor is an older, very

“springy” floor, spikes can be useful in reducing the influence of the REL on the floor. But

better yet, a heavy stone slab placed under the REL will work better. Even if you intend to use

the spikes, do NOT insert them until completion of the set-up process. After which, subtle

adjustments to crossover and gain may be necessary

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REL Acoustics ST III Manual

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