REL HT/MKII - Connecting Up; Low-Level Input Connections; Phase Adjustment Procedure

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Always switch o your system before disconnecng any wires.
To simplify and to increase the versality of connecng, the HT/MKII models have two low-level RCA
inputs. This is to facilitate ability to use with AV surround sound systems, two-channel stereo systems and
powered speakers.
Low-Level Inputs
.1/LFE Input
There is a single RCA jack labeled .1/LFE for LFE connecon to a processor. Plug one end of the RCA to RCA
cable into the .1/LFE jack of the REL and the other end into the SUB OUT Jack of your processor.
Stereo L/R Input
The dual RCA jacks can be used for stereo low-level connecon to the output of a stereo processor source or
powered speakers. When using stereo inputs, plug one end of the RCA to RCA cables into both of the LOW
LEVEL INPUT jacks of the REL and the other end into the le and right channel output of your preamplier.
The upper frequency amplicaon of these inputs can be limited using the CROSSOVER control. This
CROSSOVER control is labeled 30Hz at its minimum. Rarely should the CROSSOVER control be set to it’s
maximum 200Hz setpoint when using either LFE or stereo inputs.
The RCA inputs have corresponding output connecons so that mulple RELs can be run in parallel by
connecng the OUT of one the IN of the next. This is what we refer to as “daisy chaining”.
Phase Switch
The phase control on a REL has two posions, 0 and 180. One of these posions will set the REL in phase
with the speakers, and one will set it out of phase. The labels 0 and 180 are just labels and tell us nothing
about the rest of the system, only if the REL is working with the speakers or not. Whichever posion results
in the loudest and fullest sub bass, is the correct posion.
We want the REL to work in harmony with the speakers, reinforcing bass, not cancelling it. In other words,
we want the drivers in the speakers and the REL to move forward at the same me and move backward at
the same me. When this happens, it results in an increase in sub bass volume and the pressurizaon in the
room and they are in phase. The opposite is if the speakers and REL are working against each other causing
cancelaon of low bass. We call this out of phase.
Connecng Up