REL HT/1003, Operating Instructions Manual

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11
Always switch off your system before disconnecting any wires.
To simplify and to increase the versatility of connecting, 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 connection 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 connection 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 left and right channel output of your preamplifier.
The upper frequency amplification 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 connections so that multiple RELs can be run in parallel by
connecting 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 positions, 0 and 180. One of these positions 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 position results
in the loudest and fullest sub bass, is the correct position.
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 time and move backward at
the same time. When this happens, it results in an increase in sub bass volume and the pressurization in the
room and they are in phase. The opposite is if the speakers and REL are working against each other causing
cancelation of low bass. We call this out of phase.
Connecting Up