Sunfire MK IV - Manual (Page 14)

User's Manual 14
If you are using a
receiver which does not
have a subwoofer output or
line level outputs (pre-outs),
you can connect its
speaker outputs to the
subwoofer’s Speaker-Level
inputs. The front speakers
can still be connected to
your receiver.
The subwoofer’s internal
amplifier supplies the
power to reproduce the low
frequency range. It receives
a sample of the signal
going to your front
speakers. (An insignificant
fraction of your receiver’s
power is transferred to the
subwoofer).
There is no need to use
the Speaker Level inputs if
you are using a separate
amplifier and preamplifier.
Such systems are best
connected using the Line
Level inputs as shown in
the previous diagrams.
If you are using the Line
Level inputs and there is a
excessive amount of noise
or hum present, using the
Speaker Level inputs may
yield a lower background
noise level.
Your receiver MUST
have common
grounded outputs, or
it will be damaged if
connected to the
subwoofer’s Speaker
Level inputs.
TO FRONT SPEAKERS
R
L
RECEIVER
MAIN
OUTPUTS
Using the speaker level inputs