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This input does not need to be assigned if the
highlevel input is used.
We do not recommend controlling the remote
input via the ignition switch to avoid pop noise
during turn on / off.
6. Adjustment of the input sensitivity
ATTENTION:
It is mandatory to properly
adapt the input sensitivity of the UP 1FX to
the signal source to achieve the best possi-
ble signal quality and avoid damage to the
amplifier. It is also mandatory to adjust the
"Voltage Range" to the output voltage of
your signal source (see page 13, point 1).
The input sensitivity can be optimally adapt-
ed to the signal source using the gain control
(page 12, point 5).
This is not a volume control; it's only for adjust-
ing the amplifier gain. The setting of the control
affects both the Highlevel and lowlevel Line In-
put.
Input sensitivity is factory set to 16 Volts (high-
level) and 3 Volts (RCA / Cinch). This is definite-
ly the best setting in most applications.
The Gain control ranges are:
Low Voltage Range configuration:
Highlevel:
3
- 16 Volts
RCA / Cinch: 0.5 - 3 Volts
High Voltage Range configuration:
Highlevel:
6
- 32 Volts
RCA / Cinch: 1
- 6 Volts
If the signal source provides a lower output
voltage, the input sensitivity can be smoothly
increased via the Gain Control.
If your signal source delivers a higher output
voltage – for example, if a factory-installed
amplifier serves as a signal source – the input
sensitivity must be lowered via the control, and
the correct configuration of the "Voltage Range"
jumper must be checked.
If you are not sure regarding the signal source's
output voltage, please contact your MATCH
specialist dealer.
The Clipping LED (see page 12, point 4) serves
as monitoring tool.
Note: Don't connect any loudspeakers to the
outputs of the amplifier during this setup.
For adjustment please proceed as follows:
1. Turn on the amplifier.
2. Adjust the volume of your radio to approx.
90 % of the max. volume and playback an
appropriate test tone, e.g., pink noise (0 dB).
3. If the Clipping LED already lights up, you
have to reduce the input sensitivity via the Gain
Control until the LED turns off.
4. Increase the input sensitivity by turning the
Gain Control clockwise until the Clipping
LED lights up. Now turn the control coun-
terclockwise until the Clipping LED turns off
again.
7. Connecting the loudspeaker outputs
The loudspeaker outputs can be connected di-
rectly to the wires of the loudspeakers. Never
connect any of the loudspeaker cables with the
chassis ground as this will damage your ampli-
fier and your speakers. Ensure that the loud-
speakers are correctly connected (in phase),
i.e., plus to plus and minus to minus.
Exchanging plus and minus causes a total loss
of bass reproduction. The plus pole is indicated
on most speakers. The impedance must not be
lower than 1 Ohm, otherwise, the amplifier pro-
tection will be activated. Examples for speaker
configurations can be found on page 17 et sqq.
8. Filter settings
When using the DirectDSP function (see
page 14, point 4), adjust crossover frequencies
in the preconnected DSP or DSP amplifier. For
bandpass function, use the lowpass filter con-
trol (LPF) on the device. In this case, a 15 Hz
high-pass filter (subsonic) is always active.
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