Pequod Acoustics Srl.
Via del Madonnone 25, Florence, Italy
www.pequodacoustics.com
[email protected]
3 Wiring and Settings
The Polyphemus has an input made with a female
NL4 connector. Through a dedicated cable and termi-
nated with 2 male NL4Fc connectors it is connected
directly to the output of the power amplifier.The
3-way passive crossover, made without compromise
with high quality components is housed inside the
Polyphemus itself, and provides a ventilation hole to
allow adequate thermal dissipation. The connectors
are standard NL4 (+ 1 / -1 con 2 / -2 empty)
or water proof on request. In case of custom realiza-
tion by the installer of the connection cables, we re-
commend specifying installation-grade Low Smoke
Zero Halogen (LSZH) cables for permanent installa-
tions. The cables should use Oxygen Free Copper
(OFC) of grade C11000 or above. For distances of
more than 15 meters between Polyphemus and am-
plifiers we recommend increasing the section of the
cable poles to 4 sq.mm, to avoid excessive emission
level losses. For lengths of less than 15 m, you can
use 2-pole cables, each with a section of 2.5 sq.mm.
Connection diagrams:
Amplifier + DSP
Amplifier + DSP
Sub
USER GUIDE
NL4FC ( +1 -1 )
NL4FC ( +1 -1 )
NL4FC ( +1 -1 )
NL4FC ( +1 -1 )
2p
2p
A
B
A)Cable between Polyphemus and amp (not sup-
plied):
2-pole cable (2.5 sq.mm minimum section
per pole up to 15 m cable length, in addition we re-
commend switching to 4 mmq per pole), terminated
with Nl4FC male connector (+ 1 / -1 connected and
corresponding to +1 red and -1 black on the ampli-
fier, + 2 / -2 empty) to connect to the Polyphemus
input, which has an NL4 female connector, standard
or WP on request.
B)Cable between subwoofer and amplifier (not
supplied):
as point A
DSP general settings:
DSP general settings:
*1) High-pass filter @120Hz, 24 dB/oct. LR
Subwoofer
*2) Band pass:
High-pass filter @20Hz, 24 dB/oct. But
Low pass filter @120Hz, 24 dB/oct. LR
Gain and Time Alignment : it depends on Subwoo-
fer utilized
