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LEVEL CONTROLS
THX certified units are denoted by the THX Ultra logo on the faceplate of
the unit. For use in THX reference theater system, the level controls must
be set to the full clockwise position (highest possible level).
Generally in a home theater application, the level controls on the rear will not be used. All
of the levels will be matched through the surround processor. In a system that uses the
Reference 7270 series II for other applications, adjustment of level controls may be
needed. Start with the level controls turned all the way up (fully clockwise), then adjust
the level according to your system requirements to match each speaker as to produce
the same sound pressure level with the same reference input.
When using a combination of different speakers that may have different speaker ratings
and efficiencies, the level controls may be used to match the output level of the speakers
in the system. Example: Using a speaker with an efficiency of 93 dB @ 1w/1m and a
speaker with an effiency of 97 dB @ 1w/1m together. A 97dB speaker may sound louder
than a 93 dB speaker at a given volume level. The level control for a 93 dB speaker
would be set at a relative level that is higher than a 97 dB speaker to match their audio
volume levels. Turning the level control knob clockwise will increase the relative output
volume of the speaker. Turning the level control knob counter clockwise will decrease the
relative output volume of the speaker.
INPUTS
RCA type connectors accept line inputs from the preamplifier’s output connectors. There
are seven input connectors, one for each channel, that may be used to connect the
amplifier to the preamplifier.
RCA cable connector
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