JFA Electronicos J4 REDLINE User manual

INSTRUCTION MANUAL
AUDIO
PROCESSOR
J4 REDLINE

J4 REDLINE AUDIO PROCESSOR - INSTRUCTION MANUAL
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The J4 REDLINE Processor is a digital audio processor with 2 inputs and 4 outputs, which make it
possible to congure independently. It has a display for real-time visualization of the input and
output levels, simulating the function of an oscilloscope, and a potentiometer to adjust the
maximum input audio level.
The model also has a voltmeter on its screen.
Led indicator
Graphic display Scroll Excess of entry level
MUTE key per channel
Leds indicators of
MUTE/LIMITER per channel
Adjustment of
the maximum
input level
Input
L and R Output
1, 2, 3 and 4
Output REM
Input REM
+Battery Positive
PRESENTATION

J4 REDLINE AUDIO PROCESSOR - INSTRUCTION MANUAL
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CONNECTING DIAGRAM
Connect the power cables according to the diagram below.
Check out the example of how the outputs can be congured, remembering that the outputs can
be congured in other ways.
IMPORTANT RECOMMENDATIONS:
The recommended wiring gauge is 1.5mm² for the positive-negative wires and 0.50mm² for the
remote wires. The J4 REDLINE Processor should be xed on a stable and easily accessible base
(support) away from heat sources. It is not recommended to install the product on the sides of
loudspeakers, due to vibration. Do not x directly on the Vehicle Housing.
Never power the J4 REDLINE Processor from the original vehicle wiring. To avoid noise pickup, use
shielded signal cables. They must not pass together to the power lines and must be as short as
possible. Observe the cable crossing points. Sharp edges of Ataria or living corners can cut them,
causing future problems.
The J4 REDLINE Processor must be connected before the ampliers. If this procedure is not
followed, damage to the speakers may occur. For the purpose of safe activation of the ampliers
the J4 REDLINE Processor has a REMOTE OUT output, which sends the +12V signal seconds after
the crossover is triggered.
IMPORTANT: Any connection in the power, input or output connectors
must be made only with the device switched off.
Connect to the
seasoned main
RCA player
Connect to
output remote
player
Connect to
remote input
two ampliers
Entry level
adjustment
Amplier
1Amplier
2Amplier
3Amplier
4
Output 1 Output 2 Output 3 Output 4

GRAPHICAL DISPLAY AND NAVIGATION SYSTEM
We recommend that, when working with the J4 REDLINE Processor, always keep the instruction
manual handy so that you can consult it whenever necessary.
HOME MENU
Output Level Equalization EQ Channel
Time of Use Prole Selection Pink Noise
SCROLL NAVIGATION
Select/return button
Directional arrows
Scroll level selector
in submenus
Simultaneously pressing the
select o r but t o n and the
directional arrow locks and
unlocks access to the settings.
J4 REDLINE AUDIO PROCESSOR - INSTRUCTION MANUAL
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J4 REDLINE AUDIO PROCESSOR - INSTRUCTION MANUAL
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Customizable presentation text
Maximum peak storage
RMS level of independent outputs
RMS level of entries
Temporary storage
(1 second) of minimum
battery value
LOW VOLTAGE
PROTECTION
If the battery voltage is
less than or equal to 10V
for more than 1 second,
the MUTE function is
triggered at all outputs.
Note: The user can
manually remove
the MUTE.
Storage of minimum battery value
LEVEL METER
VOLTMETER FUNCTION
Current Voltage
of the Battery

J4 REDLINE AUDIO PROCESSOR - INSTRUCTION MANUAL
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LEVEL
Memory for 3 custom settings
Individual level
adjustment
PARAMETRIC MEDIUM EQUALIZER
Allows you to adjust the frequency
and gain of each band
Master level adjustment

J4 REDLINE AUDIO PROCESSOR - INSTRUCTION MANUAL
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SCREEN 1/4 Number of output channel
L+R, L or R input routing
Frequency of the high-pass lter
High-pass lter type (See Addendum 1)
Low pass lter frequency
Low-pass lter type (See Addendum 1)
SCREEN 2/4
Changes phase to 0° or 180°
Delays the signal in millimeters

J4 REDLINE AUDIO PROCESSOR - INSTRUCTION MANUAL
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SCREEN 4/4
SCREEN 3/4 Number of output channel
Turn on/off the Limiter function
Value in dBu and VRMS of the
actuation point of Limiter
Response time of Limiter
Recovery time for Limiter
Parametric equalizer
Adjustment of frequency parameters and "Q" merit factor

3 Proles to save processor settings
In each prole,
up to 3 semi-parametric
equalizations can be set
Lets you transfer settings from
one prole to another
Example copy of PROFILE 1 to PROFILE 2
Lets you transfer settings
from one prole to another
J4 REDLINE AUDIO PROCESSOR - INSTRUCTION MANUAL
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J4 REDLINE AUDIO PROCESSOR - INSTRUCTION MANUAL
1
Adjustment of output amplitude
Reset of
working time Momentary counter
of the processor

J4 REDLINE AUDIO PROCESSOR - INSTRUCTION MANUAL
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PRESENTATION TEXT CUSTOMIZABLE
Supports up to 16 characters
By pressing for 5 seconds on the level
meter screen, enter the display text setting.
To exit, simply press the centre key.
Character selector
Advance or retreat from home

J4 REDLINE AUDIO PROCESSOR - INSTRUCTION MANUAL
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ADDENDUM 01 - X-OVER FILTER OPTIONS
The Processor has 3 lter structures for cutting in the X-OVER menu, being them,
BUT = Butte Work, BES = Bessel and LK = Link Witz, besides the option OFF = lters off.
ADDENDUM 02 - LIMIT USE OF THRESHOLD, ATTACK AND RELEASE
The range can be adjusted from 0.10 to 2.18 VRMS.
THRESHOLD - Denes from which level the Limiter acts.
ATTACK - Is the response time of Limiter. When in AUTO (recommended),
the time is dened as follows:
Example:
Frequency L. PASS
BUT cuts in 6, 12, 18, 24 dB/8ª
BES cuts in 12, 24 dB/8th
LK cuts in 12, 24, 36, 48 dB/8th

J4 REDLINE AUDIO PROCESSOR - INSTRUCTION MANUAL
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ADDENDUM 02 - LIMIT USE OF THRESHOLD, ATTACK AND RELEASE
Table with suggestions of Fc cut frequencies and Attack and release times recommended by XTA
(American Audio Entity).
Lower Court Frequency Fc,
in Hz, from Crossover Time Attack
(Mili seconds) Release Time
= 16 x Attack time

J4 REDLINE AUDIO PROCESSOR - INSTRUCTION MANUAL
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ADDENDUM 03 - AUDIO NOISE
To decrease the noise level, we suggest the following processor conguration/settings.
1- Merge the player’s L and R channels into a Y cable and enter the processor’s L channel.
Place the input routing in the L channel (screen ¼).
2- Put the player to play at a volume close to maximum, and keep the adjustment of the input
gain as much as possible, without lighting the input clipping led.
Input CLIPP
LED
Adjustment of
the maximum
input level

ADDENDUM 03 - AUDIO NOISE
3- Level screen
-Keep Master gain at 100%.
-Put channel gain at 90%.
With the player close to the maximum volume and the gain of the amplier at least, increase the
gain of the amplier until reaching the maximum power.
If necessary, ne-tune the channel gain by maintaining its value between 80 and 100%.
4- Make a unique power supply for the 12V direct processor of the battery poles.
J4 REDLINE AUDIO PROCESSOR - INSTRUCTION MANUAL
1

TECHNICAL CHARACTERISTICS
Input channels
Output channels
Frequency response
Master semi-parametric equalizer
Parametric equalizer per channel
DSP, 24-bit hi-pass and low-pass lter
Total Harmonic Distortion (THD)
Signal/Noise Ratio from 20Hz to 30kHz
Phase
Delay
Maximum level of entry
Maximum level of output
Bar Graph
Dimensions in millimetres (L x A x P)
Weight in grams
2
4
20Hz to 20kHz
15 bands -10 to +10dB
1 band -12 to +12dB
20Hz to 20KHz, (off/6/12/18/24/36 and 48dB/8°)
0.002% at 1kHz
>90dB
0 and 180°
0 to 287cm
0,62VRMS/ 10KΩ (with aj. input at most)
4,6VRMS / 47Ω
0 to 2.1VRMS with "hold peaks"
202 x 103 x 43
480
TECHNICAL CHARACTERISTICS OF THE GRAPHIC SCREEN
Display resolution
Level
Function peaks "hold"
Resolution of the measures
Precision
Sampling frequency
128 x 64 dots
Audio = 0,04 to 2,1Vrms
1 second (Maximum audio)
Up to 0,4VRMS - 40mVrms
>0,4 <=0,7Vrms - 60mVrms
>0,7Vrms - 280mVrms
>95%
33Hz
Voltmeter = 9 to 15Vdc
-Show minimum pressure for 1s
-Stores the minimum voltage
250mV*
>97%*
33Hz
J4 REDLINE AUDIO PROCESSOR - INSTRUCTION MANUAL
1
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