Stage A6004 and A9004
• The Stage A6004 and A9004 feature Channel 1 +/-, Channel 2 +/-,
Channel 3 +/-, and Channel 4 +/- terminals.
•
4-channel operation:
Connect the front left speaker to the Channel 1 +
and - terminals, and the front right speaker to the Channel 2 + and -
terminals. Connect the rear left speaker to the Channel 3 + and - terminals,
and the rear right speaker to the Chanel 4 + and - terminals.
•
3-channel operation:
Connect the stereo speakers to the Channel 1
and Channel 2 terminals, as described above. Connect the single
speaker’s + lead to the Channel 3 + terminal, and the - lead to the
Channel 4 - terminal.
•
2-channel (bridged) operation:
Connect one speaker’s + lead to the
Channel 1 + terminal, and the - lead to the Channel 2 - terminal.
Connect the other speaker’s + lead to the Channel 3 + terminal, and
the - lead to the Channel 4 - terminal.
Stage A3001
• The Stage A3001 features a positive (+) and negative (-) terminals.
o To power a single subwoofer, connect the subwoofer’s
positive (+) wire to the positive (+) terminal, and the
subwoofer’s negative (-) wire to the negative (-) terminal.
o To power two subwoofers in parallel, connect one sub’s
positive (+) and negative (-) leads to the positive and negative
terminals of the other sub, then connect that subwoofer’s
positive (+) wire to the positive (+) terminal, and the
subwoofer’s negative (-) wire to the negative (-) terminal.
NOTE:
Minimum speaker impedance for stereo full-range and subwoofer operation
is 2 ohms. Minimum speaker impedance for bridged operation is 4 ohms.
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Line-level inputs and outputs (RCA):
If your source unit offers preamp outputs, connect to the L and R (A6002
and A3001), or CH1, CH2, CH3, and CH4 (A6004 and A9004) inputs using
RCA patch cables.
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High-level audio input:
If your car audio system’s head unit does not have line-level outputs:
Connect the white, white/black, gray, and gray/black wires of the included
high-level input harness(es) to the front and/or rear speaker output wires of
your car audio system’s head unit (splice crimps not included), and the black
wire to vehicle chassis ground. Then plug the high-level harness into the Stage
amplifier’s high-level input.
Important:
Some factory-installed audio system amplifiers include electronic
filters that limit the amount of bass sent to the system’s smaller speakers. This
filtering will adversely affect the Stage amp’s performance. To get the most
bass possible from your Stage amp, splice the high-level harness into the
factory system speaker outputs that are connected to the system’s largest
speakers (the ones designed to reproduce the most bass).
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Input sensitivity (GAIN):
Input level controls. Use these to match the amp’s input sensitivity to the
output level of your source unit. See Setting the input levels in Chapter 3 for a
recommended adjustment procedure.
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Crossover filter selectors (X-OVER):
Let you choose the crossover filters for your system (the Stage A3001 filter is
low-pass only).
• LPF: Low pass. Choose this setting if you’re connecting a subwoofer(s), or
want to provide a low-pass filter for separate mid-bass speakers.
• FULL: Full range. Choose this setting if you’re connecting full-range
speakers, and not using a subwoofer in your system.
• HPF: High pass. Choose this setting to prevent low bass from reaching
midrange or full-range speakers when you’re using a subwoofer in your
system. (See setting the crossovers in Chapter 3.)
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Crossover-filter frequency controls (FREQ):
Turn the dials to the left to lower the crossover point, and to the right to raise
the crossover point. Crossover point settings vary by listener preference.
+
-
Subwoofer
R-PROTECT
R-PROTECT
R-PROTECT
+ -
+ -
+ -
+ -
Front right speaker
Rear right speaker
Front left speaker
Rear left speaker
R-PROTECT
R-PROTECT
R-PROTECT
+
-
+ -
+
-
Front right speaker
Subwoofer
Front left speaker
R-PROTECT
R-PROTECT
R-PROTECT
+ -
+ -
Subwoofer
Subwoofer
Subwoofer
+
-
+
-
+-
Subwoofer
Subwoofer
To vehicle
speaker wires and
chassis ground
