Connecting an Optional
Stiffening Capacitor
You may connect an optional
outboard stiffening capacitor (sold
as an accessory at many car audio
dealers) to your GTi Series amplifier.
For best performance, mount the
capacitor as close to the amp as
possible, using the shortest wires
possible to connect the capacitor
to the CapTap™ connections on the
amplifier. Choose the wire gauge
according to the chart on page 3.
Make sure to connect the capacitor
observing proper polarity. Failure to
observe proper polarity may cause
damage to the capacitor and/or the
amplifier. Use at least a 1-Farad
capacitor, or a combination of
smaller capacitors, connected in
parallel, that have a total capacitance
equal to or greater than 1 Farad,
for an A1201GTi and A302GTi.
Use at least a 500uF capacitor or
combination of capacitors in parallel
for the A601GTi. Use the following
formula to determine the total
capacitance of several capacitors
connected in parallel:
Ct = C1 + C2 + C3…
Where Ct is total capacitance and
C1, C2 and C3 are the capacitance
values of the individual capacitors
connected in parallel.
Note: If you must use several
smaller caps in parallel, use caps
of equal value.
Wiring the Speaker Output
Connections
All the GTi Series amplifiers will
accept up to 8-gauge speaker wire.
A302GTi
Connect the speakers observing
proper polarity to the speaker
output connector. The total nominal
impedance of the speaker system
connected to the amplifier when the
amplifier is driven in stereo must be
at least 2 ohms.
If you are bridging the amplifier,
connect the speaker wires to the
terminals marked “bridged”, observing
proper polarity. The total nominal
impedance of the speaker system
connected to the amplifier must
be at least 4 ohms in bridged mode.
If you are running the amp in
Tri-Mode (stereo and mono
simultaneously): Connect the satellite
speakers to the speaker connector
as you would a pair of stereo
speakers. Connect the subwoofer
to the terminals marked “bridged”.
Refer to the chart below to determine
the capacitor and inductor values
you’ll need to route bass signals to
the woofer, and midrange and high
frequencies to the satellite speakers.
These passive crossover components
will also ensure that the impedance
of the speaker system doesn’t drop
below 2 ohms.
A1201GTi, A601GTi
Connect the woofers to the amplifier
observing proper polarity. Although
these amplifiers have a single chan-
nel, duplicate positive and negative
connectors are provided to facilitate
the connection of multiple woofers.
You may use terminal and
either – terminal on the amplifier.
Wiring the Input Signal
Connections
Connect a pair of signal cables with
RCA-type connectors between the
RCA-type input connectors on the
amplifier and the RCA-type output
connectors on the source unit.
The A1201GTi and A601GTi have
been designed to provide constant
bass regardless of the position of the
source unit’s front to rear fader. Use
of this feature requires that all four
inputs are connected to the source
unit as labeled on the amplifier: front,
rear, right and left. If nonfading
bass is not important in your system,
connect a pair of inputs to either
the front or rear input connectors
on the amplifier.
Installing the Remote Level
Control (A1201GTi and A601GTi
only) and Status Monitor
Choose a suitable location for the
status monitor. There must be at
least 2" clearance behind the
mounting surface. Cut a rectangular
hole 3-1/4" by 1-5/8". Connect the
red wire to a constant 12V+ source,
the black wire to ground and the
green wire to the remote turn-on
wire from the head unit. Connect
the RJ45 cable between the amplifier
and the status monitor. Connect the
RJ11 cable between the status
monitor and the remote level control.
Turn the screws located on the front
panel clockwise to engage the
mounting tabs and continue turning
the screws clockwise to tighten the
status monitor in its location. See
Figure 3 below.
Figure 3. Mounting the status monitor
FREQUENCY
INDUCTOR CAPACITOR
Crossover
6dB/oct. LP 6dB/oct. HP
(4-ohm)
(4-ohm)
75Hz
8.0mH
530µF
100Hz
6.4mH
400µF
125Hz
5.0mH
318µF
150Hz
4.2mH
265µF
175Hz
3.6mH
227µF
200Hz
3.2mH
198µF
3.25 in.
PO
WE
R
MO
DE
1.6 in.
0.5 in. m
ax
thickness
TO REMOTE
LEVEL CONTROL
TO AMPLIFIER
REMOTE
ON
(GRN)
GND
(BLK)
BATT+
(RED)
04
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