Input Configuration; Parallel Mode - Alpine PDP-E802DSP Manual

8 channel class-d dsp power amplifier
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INPUT CONFIGURATION

Set the jumpers accordig to your connection
method to the headunit.
High Level inputs (speaker line)
Load Selection for High Level Inputs
If PDP‑E802DSP is replacing an OEM amplifier,
which has been driven by the factory headunit's
speaker outputs, it is often the case that those
outputs are configured in so called line driver
mode. (DC bias voltage without signal vs. GND
is approx. 3V.)If so, it may be required to set the
corresponding PDP‑E802DSP speaker inputs'
impedance to 100Ω by removing the yellow
jumpers in order to prevent the headunit from
shutting down its speaker outputs.
Low Level inputs (RCA)
10
-EN
Important:
For setting the High/Low level jumpers make sure
the power is disconnected.
To change the position of a jumper, it has to be
removed by pulling it straight up. Make sure that
the jumper is reinserted properly and all pins are
fully inserted.
Default setting is low level input.

PARALLEL MODE

Depending on the system setup there are two
options for driving 2Ω loads (e.g. subwoofer).
Option 1: The 2Ω driver is being connected to a
single output channel.
Advantage: No reduction of available output
channels. Up to 100W (RMS) into 2Ω.
Side effect: The maximum output power is also
being reduced for all other channels.
Option 2: The 2Ω driver is being connected to a
paralleled output channel.
Conditions: Output CH1+2 or CH3+4 or CH5+6 or
CH7+8 need to be paralleled.
Advantage: Better damping factor for the
connected 2Ω load.
Side effect: The total number of output channels
will be reduced.
Note: Please do not to set more than 4 channels
in parallel mode to avoid any overheating. This
feature is intended for driving low impedance
woofers of factory systems.
All channels are in standard mode in the above
image. This is the default setting.

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