User Manual

Table Of Contents
53
AP F8.9 bit /
USER’S MANUAL
9. ACCESSORIES
9.1 DRC DIGITAL REMOTE CONTROL
The DRC MP is the digital interface between the bit processors
and the user. When mounted on the vehicle’s dashboard with an
AP F8.9 bit processor, it will enable the following functions:
- select Master or Optical input
- control general volume, subwoofer volume, balance and fader.
- select between 2 memories pre-set by the user for the set up
of equalizer and crossover alignment.
- enable/disable the Bass boost function.
- adjust the display lighting according to lighting in the car
compartment.
The DRC AB is the digital interface between the bit processors and
the user providing reduced functions compared to the DRC MP.
When mounted on the vehicle’s dashboard with an AP F8.9 bit
processor, it will enable the following functions:
- select Master or Optical input
- control general volume, subwoofer volume, balance and fader.
- select between 2 memories pre-set by the user for the set up
of equalizer and crossover alignment.
9.1.1 DRC MP
9.1.2 DRC AB
9
9.2 SPM4 (Stereo Passive Mixer 4Ch)
Stereo passive mixer (unpowered) featuring 4 input
channels and 2 output channels, designed for active
OEM multi-way systems where each speaker is powered
by one specific amplified channel. SPM4 mixes
audio through 4 audio transformers specifically developed
to achieve very low distortion and highly linear
acoustic response. SPM4 provides the ability to mix the
midrange/woofer and tweeter channels coming
from the amplifier and supply one single mid-high
channel. The Ch1(L/R) channels feature two inputs,
one features an inverting input compared to Ch2 (L/R)
channels; the mixing process often gives better
results when one of the two channels undergoes a 180°
dephasing. SPM4 is especially recommended
to extend the number of inputs of the Audison digital
processors or amplifiers with built-in DSP because
they feature a De-equalizer (De-Eq). In that case, any
possible non-linear acoustic emissions due to the
mixing of the pre-existing filtered channels are duly
compensated.