Nexo Digital TDcontroller Series User Manual

AMPLIFIERS SETUP
Amplifiers setup
Refer to the datasheet of the Nexo speaker system used with DTD
and select the power amplifiers output power accordingly.
It is recommended to use only high quality, 32 dB gain amplifiers.
However, the DTD controller can operate with amplifiers with gain up
to 40 dB. Please check your amplifier user manual.
Any processing integrated on the amplifier like high-pass filter must be
disabled.
WARNING! Do not use amplifiers that introduce latency
between its inputs and outputs (amplifiers with integrated DSP for
example) as it will prevent the DTD to protect the speakers.
Sensing the amplifier outputs
WARNING! All Output of the power amplifiers must always be
fed back to the DTD to ensure correct speakers protection.
On the DTD-T, use a four wire SP4 cable to connect the output of the
amplifiers to the back panel SP4 inputs.
From sub amplifier outputs From mains amplifier outputs
WARNING! Use at least a 2.5 mm² (AWG #13) double
insulated cable.
For the SP4 cable coming from the mains amplifier:
• 1+/1- poles must be connected to mains amp left output.
• 2+/2- poles must be connected to mains amp right output.
For the SP4 cable coming from the
sub amplifier:
• 1+/1- poles must be connected to sub first output.
• 2+/2- poles must be connected to sub second output.
If only one sub channel is used (bridged amplifier for example) then
connect the two poles pairs of the DTD sub amp input on this unique
output:
• 1+/1- poles must be connected to sub mono output.
• 2+/2- poles must be connected to sub mono output.
The DTD-T will pass through these signals on the front panel:
• On the Left SP4 plug, mains amp left outputs on 2+/2- and sub amp
first outputs (or mono output) on 1+/1-.
• On the Right SP4 plug, mains amp right outputs on 2+/2- and sub amp
second outputs (or mono output) on 1+/1-.
To left main cabinet To right main cabinet
and left/mono sub and right/mono sub
On the DTD-I, use a four wire speaker cable to connect the output of
the amplifiers to the back panel terminal block connectors.
From sub amplifier outputs From mains amplifier outputs
WARNING! Use at least a 0.5 mm² (AWG #20) double
insulated cable.
On amplifiers with two kinds of output connectors, one kind can be
used to connect the DTD-I amplifier sensing inputs while the other can
be used for connecting the speakers if not then a Y connection should
be used.
SP4 outputs fed the speaker Banana outputs to DTD-I
• Connect the + and – poles for the Mains (left and right) amplifier
sensing to the Mains power amplifier outputs.
• Connect the + and – poles for the Sub amplifier sensing to the Sub
power amplifier outputs. The two poles pairs should be connected
even if only one channel of amplifier is used for the sub (bridged
amplifier for example).
Front panel interface
Graphical OLED display
The DTD uses a high luminosity graphical OLED display to show the
speaker setup running into the unit.
Front Panel Controls (DTD-T only)
Two rotary control knobs and a three position switch are available on
the front panel of the DTD-T.
• Use the sub gain control to adjust the sub channel output level
between -6 and + 6 dB.
• Use the main gain control to adjust the main channels output level
between -6 and + 6 dB.
Use the switch to select between the speaker system options:
• “WB” (Wideband) means the Main outputs are full range (no high-
pass) typically for use without sub. Advanced settings are set to
default.
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Nexo Digital TDcontroller Series Specifications

General

Brand	Nexo
Model	Digital TDcontroller Series
Category	Computer Hardware
Language	English