Operation Manual

main system is carried forward into the Sub-Bass System. This is a very important point and together with

REL’s Natural RollOﬀ™ circuitry, ensures far superior system integration of the Sub-Bass System with the

main system.

HIGH-LEVEL INPUT: Connections should be made to the same binding post on main amplifier as the main

speakers. Red to amplifier main right speaker red terminal, yellow to amplifier main left speaker red terminal

and black to amplifier main speaker black terminal, right or left but not both. Plug the Neutrik Speakon plug

into the HIGH-LEVEL Speakon socket. Note: This connection does not draw power from the power amplifier

and, yes, your REL is a powered sub bass system. However, by deriving its signal from the main power

amplifier, better sound quality is achieved.

.1/LFE INPUT: This requires a phono-to-phono cable and is a dedicated true .1 channel. This circuit

therefore eliminates the normal Natural RollOﬀ™ Crossover and passes the .1 LOW-LEVEL signal through

with only the required 120Hz fourth-order filter.

LOW-LEVEL INPUT: This single channel phono input allows for conventional connection to a preamplifier

and should be used in the rare event that a HIGH-LEVEL connection proves incompatible. Plug one end of

a single phono-phono cable into the LOW-LEVEL input jack of the REL and the other end into either the

left or right channel output of your preamplifier. Because much sub-50Hz bass information is mono, there

is little need to connect both left and right channels. Should your system require this style of connection

– HIGH-LEVEL is preferred – additional performance is available by purchasing a second, matching REL and

running each as separate stereo subs.

PHASE SWITCH – Used to set phase

Position 0 / HIGH-LEVEL, LOW-LEVEL or LFE: 0 degrees phase

Position 180 / HIGH-LEVEL, LOW-LEVEL or LFE: 180 degrees phase

PHASE SELECTION AFFECTS BOTH HIGH- AND LOW-LEVEL INPUTS

Crossover is always engaged for HIGH-LEVEL INPUT. The .1/LFE signal does not pass through the

crossover circuit.