PRV Audio DSP 2.4X User manual

2 3
Introduction
The DSP 2.4X is a digital audio processor that oers a huge range of high
precision sengs and conguraons to improve the performance of your
audio system. It has a Digital Signal Processor (DSP) that realizes equalizaons,
crossover lters, alignment, gain control, phase inversion, limiter, digital roung
of inputs and outputs, among other treatments. Its new exclusive sequencer
feature makes it possible to congure the programmed acvaon and shutdown
of up to 3 products from the remote acvaon connecons (REM).
Before installing
Please read this manual carefully.
▪ All product connecons must be made with the product turned OFF.
▪ Use gauges recommended in this manual to avoid the overheang of the
cables to obtain maximum power.
▪ Keep the cables as short as possible to increase sound delity and avoid
potenal power losses.
▪ Route the installaon cables as far away as possible from the original vehicle
wiring as it may cause interference and noise in your audio system.
▪ Perform the installaon in a rm, venlated and dry place.
• Installaon must be done by a qualied professional.
If you have quesons , contact the store where the purchase or installaon was made.
For more informaon please contact: [email protected]
English
Resources
The DSP 2.4X has 2 inputs and 4 independent outputs that allow adjustments
to the audio individually for each output through several funcons and features
integrated into the processor:
▪ Graphic input equalizer (15 bands and equalizaon presets)
▪ Parametric input equalizer (frequency, gain, Q factor)
▪ Parametric equalizer per output (frequency, gain, Q factor)
▪ Roung between inputs and outputs
▪ High precision crossover with Buerworth and Linkwitz-Riley lters and
aenuaons up to 48 dB/8th
▪ High precision alignment/delay
▪ Phase inversion
▪ Limiter with Threshould, Aack and Release adjustment
▪ Independent gain and mute per output and master volume
▪ Working memory with automac saving of sengs
▪ Allows you to save and load the sengs made by the user
▪ Security password to block parameter modicaon
▪ Frequency generator, frequency sweep and pink noise generator
▪ Screen saver with rotang text
▪ Outputs for remote acvaon with congurable sequencing.
Any updates made in this manual will be available for customers to consult without any charge
on the brand’s site.
It is recommended that the updated manual be consulted whenever needed.
Images contained in this manual are merely illustrave and may dier from the actual product.

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1. SEQUENCER: It allows sequenal acvaon of other products through the remote
acvaon (REM) connecon. Use a cable of at least AWG 20.
2. REM IN: Allows automac acvaon of the amplier when turning on the radio/
player. Connect to the remote output of the radio/player mininum of AWG 20.
3. NEGATIVE POWER CONNECTOR (GND): Connect to the negave terminal of the
baery using a cable minimum of AWG 13.
4. POSITIVE POWER CONNECTOR (+BAT): Connect to the posive terminal of the
baery using a cable minimum of AWG 13. It is recommended to use a fuse for
external protecon of 1A.
5. DISPLAY LCD: It allows visualizaon and interacon with the processor system.
6. MAIN CONTROL: Rotary control that allows interacon with the processor
system funcons and resources:
• ENTER funcon: Short press on the encoder.
• RETURN funcon: Long press on the encoder.
Overview 7. HOTKEYS: Shortcut keys for selecng output channels:
• Short press: Selects the channel for applying the parameters.
• Long press: Allows you to turn the selected output channel on or o.
HOTKEY on blue: output channel on.
HOTKEY lit red: output channel o.
8. LED LIMITER: The LEDs will light when the “LIMITER” of the channel in queson is
acng, they are also used as indicators of output saturaon.
9. AUDIO INPUT (INPUT): RCA type connectors with independent actuaon (A and
B). Connect to the radio/player via quality shielded RCA cables to prevent noise.
10. AUDIO OUTPUT (OUTPUT): RCA connectors, provide the audio processed
according to the sengs made on the processor.
ROTATION: Navegation, increase and decre-
ase in values.
SHORT PRESS: Enter, select, skip parameter.
LONG PRESS: Return to the previous screen.
SHORT PRESS: Select output channel.
LONG PRESS: Output ON/OFF.
Navigation keys
Navigaon and control of the DSP 2.4X are made via the MAIN CONTROL knob
and the HOTKEYS hotkeys.
MAIN CONTROL HOTKEYS
5
21 3 4
8
6
109
7

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Settings map
Find the desired conguraon from the illustraon below with all conguraons
and processor features:
Audio Processing
Graphic Equalizer
Presets
Save
Load
Security
Tools
Screensaver
Language
Sequencer
Graphic Input Equalizer
Parametric Input Equalizer
Parametric Output Equalizer
Roung Audio
Crossover
Delay
Phase
Limiter
Gain
Mute
Lock/Unlock
Charge Password
Tone Generator
Frequency Sweep
Time
ON/OFF
Main Menu
Processor features
GRAPHIC EQ
f: 63 Hz +2.6 dB
PARAMETRIC EQ
freq.: 214 Hz
PARAMETRIC EQ
gain: +3.2 dB
PARAMETRIC EQ
Q: 1.4
• Graphic Input Equalizer
The input graphic equalizer has 15 bands, allowing a variaon of ± 12 dB per
band, with a pitch of 0.1 dB, with frequencies equally spaced in 2/3 octave, in
the range of 25 to 16 kHz in accordance with
ISO requirements . The graphic equalizer
acts on the two inputs simultaneously.
• Parametric Input/Output Equalizer
The parametric equalizer allows you to choose a gain / aenuaon at a specic
frequency, as well as the bandwidth of that equalizer by means of the Q factor,
the smaller the Q the greater the width of that equalizaon band, aecng to a
greater extent the neighboring frequencies .
The DSP 2.4X has 5 parametric equalizers distributed as follows, 1 for the inputs
and 4 for the outputs (1 for output).
• Input and Output Routing
The purpose of the roung opon allows you select the audio source A, B
or A + B (sum) for each output. Turning the MAIN CONTROL dial moves the
audio source to the selected route. To
select another channel, quickly press the
corresponding HOTKEY.
ROUTING
IN A+B ---> OUT1

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In the “CROSSOVER” menu, each short press on the MAIN CONTROL changes
the parameter being edited, between output, lter type, frequency and
aenuaon/topology. To select another output channel for eding, short press
the HOTKEY key on the corresponding output.
frequency cancellaons.
The adjustment can be carried out as
follows:
• Crossover
This funcon allows precision denion of the cuto frequencies for the high-
pass lter and the low-pass lter, as well as lter aenuaons and topology
individually by output. The available lters and aenuaons are:
• Balance / Delay
This funcon allows for the digital alignment of transducers (speakers) via the
me correcon performed by the DSP, and ensures that the sound from all
the speakers arrives at the listener with improved audio delity while avoiding
HPF: Buerworth 12/18/24/36/48 dB/8ª
Linkwitz-Riley 12/18/24/36/48 dB/8ª
LPF: Buerworth 12/18/24/36 dB/8ª
Linkwitz-Riley 12/18/24/36 dB/8ª
HPF OUT
f:12 Hz LR48
LPF OUT1
f:107 Hz BT12
DELAY OUT1
12.0cm 0.349ms
Case Front
Panel
Reference (*)
1. Idenfy the coil farthest from the
listener or the front panel of the box.
This coil will be used as a reference;
2. Measure the distance from the other coils to
the reference coil. These are the distances used in
conguring the delay of each output channel.
the “Encoder” dial changes the phase (0°
ou 180°) of the corresponding output. To
select another channel, quickly press the
corresponding HOTKEY shortcut.
• Phase
This funcon is used for resolving problems caused by canceling frequencies.
From this screen you can reverse the phase of all outputs individually. Turning
• Limiter
To protect your ampliers and speakers, the DSP 2.4X has a limiter with an integrated
“Dynamic Aack-Release” system for each of the 4 outputs. Use this funcon to
aenuate and prevent damage to the system caused by signal peaks.
The Threshold (-24 to 0dB) seng denes a threshold for the Limiter’s acvaon:
the Limiter kicks in when this threshold is exceeded.
The Aack parameter (0.1 to 100 ms) denes how fast the Limiter reacts / acts when
the signal exceeds the Threshold.
The Release parameter (1 to 1600 ms) controls the recovery me elapsed between
the me the signal falls below the Threshold and deacvaon of the Limiter.
PHASE
OUT1:180
LIMITER
THRES.: -9.5 dB
LIMITER
ATTACK: 0.1 ms
LIMITER
RELEASE: 500 ms
LIMITER OUT1
AUTO: OFF [ON]
• Gain
This menu allows you to adjust the gains of the
individual outputs within a range of -45 to +15 dB, as
well as to increase the master volume from 0 to 100%.
In addion to manual adjustments
of Aack and Release values, it
is possible to enable the “AUTO”
mode, where the Aack and
Release parameters are controlled
in real me by the “Dynamic Aack-
Release” system, providing ideal
condions for sound delity.
MASTER LVL: 82%
OUT1 GAIN: +3dB

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OUT1: ON
GRAPH EQ: ON
MUTE ALL (ENTER)
GRAPH EQ: ON
ON ALL [ENTER]
GRAPH EQ: ON
• Mute
The outputs can be switched individually on and o quickly by holding down the
HOTKEY key that corresponds to the output. The LED color indicates the status
of the output.
In the “MUTE” screen, you can sll
turn o and on all the output channels
simultaneously using the MAIN CONTROL
go to the output eld and select “ALL-
ENTER” or “ALL-ENTER ON”. Then fast
touch on MAIN CONTROL. You can also
turn the input graphic equalizer on or o.
BLUE LIGHT: OUTPUT ON / RED LIGHT: OUTPUT OFF (MUTE)
MAIN MENU
Graph EQ Presets GRAPH EQ PRESETS Loudness
• Graphic Equalization Presets
The DSP 2.4X oers 12 graphic equalizaon presets that are selected from the
“GRAPH EQ PRESETS ” in the main menu:
• FLAT • LOUDNESS • BASSBOOST • MID BASS • TREBLE BOOST
• POWERFUL • ELECTRONIC • ROCK • HIP HOP • POP
• VOCAL • PANCADAO (Heavy Beat)
• Save / Load / Factory Reset
The DSP 2.4X has 5 memory slots available for saving personalized sengs,
accessed via the “SAVE” funcon. Saved sengs can be named with tles up
to 15-characters long. Besides the memory space available to the user, there
is autosave, where all parameters and sengs are saved in a separate working
To load previously saved sengs use
the “LOAD” funcon. This funcon also
allows the factory presents to be loaded
via the “DEFAULT” memory.
SAVE MEMORY1
Memory1
LOAD
Default
FACTORY RESET
NO [YES]
memory. Or rather, if there is a drop in
power or the product is turned o during
conguraon, the sengs will not be lost.
This funcon cannot be disabled.
If you want to restore all of the DSP 2.4X factory sengs, simultaneously hold down the
HOTKEY shortcut keys for outputs 1, 2 and 3 while turning on the device.
This procedure will erase all internal sengs and saves.
Tone Generator: Generate a specic frequency with gain control.
Each press on the MAIN CONTROL parameter is edited between frequency, gain
and ON/OFF. With the generator on it is sll possible to change the frequency
and gain in real me, and even modify other audio parameters of the processor.
• Security
This funcon locks the ability to edit sengs, including blocking the save
and load sengs. Via the “SECURITY” menu you can lock or unlock (“LOCK/
UNLOCK”) and change the password (“CHANGE PASSWORD”).
The funcon on/o the output channels is not blocked.
SECURITY
Lock/Unlock ENTER PASSWORD ____
SECURITY
Charge Password CHARGE PASSWORD Current PW:____
Default password: PRV1 (all caps)
• Tools
The audio processor has tools to aid in the regulaon of your sound system,
TONE GENERATOR, FREQUENCY SWEEP and PINK NOISE GENERATOR. These
tools are signal sources for all outputs, that is, during their use as inputs.

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Frequency Sweep: Allows you to perform a frequency scan, with the opon of
selecng the inial and nal frequency, gain, scanning speed and ON/OFF.
When acvang the sweep enters a connuous cycle, to close it simply press
any of the HOTKEYS or move the MAIN CONTROL.
TONE GENERATOR
freq: 100 Hz
TONE GENERATOR
gain: -45.0 dB
TONE GENERATOR
OFF [ON]
FREQUENCY SWEEP
start: 10 Hz
FREQUENCY SWEEP
end: 22000 Hz
FREQUENCY SWEEP
speed:medium
FREQUENCY SWEEP
gain: -45.0 dB
FREQUENCY SWEEP
OFF [ON]
Tempo / Time
Amplitude
• Screensaver
The audio processor has a screensaver
funcon, which allows the user to dene a
15-character scrolling text.
SCREENSAVER
PRV DSP2.4X
• Language
You can select from the following operang
languages: English, Spanish and Portuguese.
LANGUAGE
<< ENGLISH >>
• Sequencer
This feature allows you to acvate several products sequenally.
The sequencer has three outputs (S1, S2 and S3) that are acvated and deacvated
sequenally according to the input signal of the remote input (REM IN).
The acvaon interval between each
output can be congured from 0s to 4s.
When the congured me is 0s, the three
outputs will be enabled and disabled at the
same me, aer 3s of the absence of the
remote signal at the input (REM IN).
To connect the remote signals, use cables
of at least 20 AWG.
It is possible to turn ON/OFF each
sequencer output independently.
When the output is turned o, it will not
trigger when the processor is turned on
again.
MAIN MENU
Sequencer
SEQUENCER
ON/OFF
SEQUENCER
S1: ON
SEQUENCER
Time
SEQUENCER
Time : 2.0 s
Radio /
Player
Baery
Example of installing the "SEQUENCER" feature: PRV AUDIO
AMPLIFIER 2
AMPLIFIER 3
AMPLIFIER 1

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Technical specications
Number of Channels:
Graphic Equalizer:
Graphic Equalizaon Presets:
Parametric Equalizer:
Crossover with Variable Frequency:
Roung between Inputs and Outputs:
Alignment:
Phase Inversion:
Limiter:
Master Level and Gain:
Memory Posions Save/Load:
Security:
Frequency Generator:
Frequency Sweep:
Pink Noise Generator:
Screensaver:
Languages:
Latency:
Input Impedance:
Output Impedance:
Max. Input and Output Voltage:
Max. Output current (SEQUENCER):
Saturaon Indicator:
Signal-to-noise rao:
Total Harmonic Distoron (T.H.D):
Channel Separaon:
Frequency Response:
Power supply:
Max. Current Consumpon:
Dimensions (W x H x D):
Weight:
Input: 2 / Output: 4
15 Bands (gain ±12dB)
12
1 Input + 1 per Output (gain ±12dB, Fator Q 0.4 ~ 10.0)
Buerworth: 12/18/24/36/48 dB/8ª
Linkwitz-Riley: 12/18/24/36/48 dB/8ª
A, B or A+B
0 ~ 8ms (275cm)
0° ~ 180°
Threshold: -24 ~ 0dB / Aack: 0.1 ~ 100.0ms and
Release: 1 ~ 1600ms (manual/automac)
0 ~ 100% (Gain -45 ~ +15dB per output)
Autosave + 5 slots
Password with 4 digits
10Hz ~ 22kHz, Level -60 ~ 0dB
Freq. inial and nal 10Hz ~ 22kHz
(Level -60 ~ 0dB and Speed control)
10Hz ~ 22kHz and Level -60 ~ 0dB
Editable text with 15 characters
Portuguese, English and Spanish
1.08ms
10 kΩ
47 Ω
5.6 Vpp (+8,2 dBu)
180 mA per output
1per input + 1per output (linked to the Limiter)
>90dB
<0,01%
>80dB
10Hz ~ 22.5kHz @ -1dB
9V ~ 16V DC
350mA @ 12.6V DC
37 x 200 x 101 mm
455g
Warranty Term
PRV Audio products are guaranteed for a period of
ONE (1) YEAR from the date of original purchase
against any manufacturer’s defects in material and
workmanship under normal use. This warranty
protects only the original purchaser of PRV Audio
products purchased from an Authorized PRV Audio
Dealer. This warranty is non-transferable.
When a product is sent to PRV Audio for warranty
claims, it is assumed that the original purchaser has
read and fully understands the PRV Audio warranty
policy. In no event shall PRV Audio be liable for
incidental or consequenal damages including,
without limitaon: injury to persons, property or loss
of potenal income.
Product must be repacked in original packaging or
equivalent, with padding to avoid damages during
transportaon. The purchaser is responsible for
expenses to return the product to PRV Audio Brazil
for a Warranty Claim. Please DO NOT return your
amplier to a retailer, all warranty claims must be
sent to PRV Audio. Upon receipt of the item, PRV
Audio will nofy claimant within THREE (3) business
days. At this me, PRV will let claimant know: (a)
if the item qualies for a warranty claim; (b) the
expected turn-around me to receive the item
back; (c) the proper procedure to follow to ensure
minimal delays. If an item does not qualify for
warranty, then claimant is responsible for ALL freight,
shipping, and repair costs. The purchaser may decide
if he/she wishes to repair the amplier for a fee.
Please keep in mind all guidelines presented to you
before sending your amplier! PRV Audio Brazil is
NOT responsible for any return without an authorized
number. If you have any quesons concerning what
voids a warranty, please do not hesitate to ask.
We do this to protect our customers and our
retailers. We want you to enjoy the best performance
possible from PRV Audio Ampliers. Purchasing PRV
Audio products from an authorized retailer means
you are guaranteed.
ATTENTION – Product is NOT eligible for warranty
if serial number and/or warranty seal have been
removed or tampered with.
This warranty does not extend to damage resulng
from, but not limited to:
▪ Improper installaon
▪ Product modicaon
▪ Misuse and neglect
▪ Abuse (items returned repeatedly for the same
damage may be considered abuse)
▪ Damage resulng from aempted repairs by
unauthorized repair centers or individuals
▪ Damage incurred during shipment
▪ Product damaged in an accident
▪ Damages due to criminal acvity
▪ By ‘acts of God’ (lightning, ooding, etc.)
▪ Blown outputs or power supplies in ampliers from
overdriving or under voltage due to ignoring the LED
Clipping Indicator
▪ Using an aluminum wire and/or any other wire that
is not recommended in the owner’s manual on a
high-current amplier
▪ We will not honor any warranty claim(s)on
ampliers purchased from internet sellers.
▪ Excessive vibraon damage in ampliers due to
improper installaon
▪ Installaon and removal costs of the products
associated with obtaining a warranty claim
▪ Products with the serial number and/or warranty
seal removed or damaged
Amplier must NEVER operate with the clipping
LED ON !! Abuse may cause damage to amplier or
speakers.
For any products not qualied for warranty
protecon, PRV can sll repair it for a cost determined
by the damages occurred to the unit. Thank you for
choosing PRV!
We’ll contact you as soon as possible once your
Return Authorizaon (RA) request is processed.
We will return your request with an RA number via
e-mail. Thank you!
RA Request Precess
Access the website: www.prvaudio.com/warranty and ll up the form in order to receive a RA #
(Return Authorizaon Number) prior to returning your item.
19548 - R1

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