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ATA1000.4 / ATA1400.4 / ATA2000.4 FOUR-CHANNEL AMPLIFIER APPLICATIONS
4 CHANNEL FULL RANGE SYSTEM
Here we show how to use the 4 channel amplifiers as straight forward discrete 4
channel full range units. The
MODE
Interconnect cable checklist:
- Connect the four inputs of the amplifier to a Radio/CD with quality RCAcables.
Switch setting checklist:
- 1/2CH X-OVER:
FULL
- 3/4CH X-OVER:
FULL
Crossover frequency control checklist:
Channels 1/2:
FULL RANGE
STEREO LINE
INPUTS
2 or 3 CHANNEL SYSTEM
Here we show how to use the 4 channel amplifiers as a 3 channel unit by taking
advantage of the mono bridging capability of allAutotek amplifiers.
The following example shows how to create a 3 channel system by mono
bridging channel pair 3 / 4. In order to create a 2 channel system, simply follow
the example to also mono bridge channel pair 1 / 2.
Interconnect cable checklist:
-
MODE:
Set at 3CH
- Connect the inputs of channel pair 1/2 to a suitable stereo source, e.g. a head
unit with good quality RCAcables.
- A MONO signal source is required to bridge channel pair 3/4, such as would be
available from the mono sub bass output of an active crossover, whether
standalone, or built into a head unit or equalizer. If you only have 1 set of RCA
outputs from your headunit, you can simply connect those to the inputs for ch
1/2 and switch the
MODE
to 2ch. The amplifier will auto sum the signal and
provide mono output for bridged channels 3/4.
Important:
Do not be tempted to connect the hot, or positive outputs, from any
source together to obtain a mono signal, as this could very well damage the
output stage of that source.
- It is necessary to feed the SAME signal to both left and right inputs via a Y-
adapter RCAcable.
- Connect the mono speaker positive terminal to the LEFT +, and its negative
terminal to RIGHT - as shown.
FULL RANGE
STEREO LINE
INPUTS
MONO LINE INPUT
(Unless using procedure
4
listed above for 3ch)
switch should be in 4CH.
- HI PASS: N/A
- LOW PASS: N/A
Channels 3/4:
- HI PASS: N/A
- LOW PASS: N/A
Level control checklist:
- Refer to the section
"Setting up systems after installation for best performance"
Minimum final loudspeaker impedances:
- 2 ohm per channel.
Switch setting checklist:
- 1/2CH X-OVER:
FULL
- 3/4CH X-OVER:
LPF
Crossover frequency control checklist:
Channels 1/2:
- HI PASS: N/A
- LOW PASS: N/A
Channels 3/4:
- HI PASS: N/A
- LPF: 11 o'clock
If you are using the mono sub bass output of an active crossover, there is
TIP:
nothing wrong with switching in the low pass filter in these amplifiers for a
steeper low pass rolloff.
Level control checklist:
- Refer to the section
"Setting up systems after installation for best performance"
Minimum final loudspeaker impedances:
- 2 ohm per channel in stereo mode.
- 4 ohm mono bridged.
MONO SPEAKER
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