Crescendo audio Concerto Series User manual

c3000.2D
c2000.4D
Full range digital amplifier

INTRODUCTION
Congratulations and thank you for purchasing your Crescendo amplifier, the logical choice
in mobile audio amplification. Your amplifier has been designed and engineered with the
highest quality components and top of the line workmanship to help you reach the superior
sound you are after. To achieve optimal performance of your system, please take a few
moments to read over this operating manual if needed before starting your installation.
DESIGN FEATURES
@1ohm stereo stable & highly efficient full range digital 2ch amplifier for c3000.2D
@ 2ohm stereo stable & highly efficient full range digital 4ch amplifier for c2000.4D
@ 1ohm stereo stable or 2ohm mono for c3000.2D
@ 2ohm stereo stable or 4ohm mono for c2000.4D
@2oz pure copper trace red military grade circuit boards.
@ 0 gauge platinum plated power / ground terminals
@ Hand-wound high grade power transformers
@ Tiffany style RCA In / Out connectors for best signal connection
@ Custom designed and tooled 2 piece heatsink for efficient cooling and superb cosmetics.
@ The most safe protection circuits are applied to protect the amplifiers and audio systems.
* Thermal protection * DC offset * Speaker short protection * Voltage protection circuit
SPECIFICATIONS
c3000.2D is 1ohm stereo stable 2 channel full range digital amplifier
c2000.4D is 2ohm stereo stable 4 channel full range digital amplifier
Frequency response : 10Hz ~ 37KHz
Signal to Noise Ratio : 105dB
Damping Factor : 200 <
Input sensitivity : 6V ~ 0.2V
HPF Filter : 20 ( 200 ) Hz ~ 800 ( 8K) Hz @ 12dB / Oct
HPF Filter Multiply : x1, x10
HPF Filter selector : ON / OFF
LPF Filter : 50 ( 500 ) Hz ~ 800 ( 8K) Hz @ 12dB / Oct
LPF Filter Multiply : x1, x10
LPF Filter selector : ON / OFF
Band-pass capable
Input mode selector : 2CH/ 4CH
0 gauge power & ground terminals.
External Fuses rate : c3000.2D : 250A, c2000.4D : 150A
RMS OUTPUT POWER
c3000.2D : 1500Watts x 2 ch at 1ohm RMS or 3000Watts x 1 ch at 2ohm mono.
c2000.4D : 300Watts x 4 ch at 4ohm RMS or 1000Watts x 2ch at 4ohm mono.

c3000.2D & c2000.4D CONTROLS & CONNECTIONS
RCA INPUT :
Connect preamp signal
cables from the source or
the headunit to RCA input.
RCA INPUT
RCA OUTPUT
RCA OUTPUT :
Output RCA jack to another amplifier.
POWER & PROTECT LED
POWER LED ; Blue-lit shows correct operation.
PROTECT LED : Red-lit shows general
malfunction, faulty connection, or
thermal protection.
CLIP LED
When c2000.4D power is clsoe to
the clipping level, CLIP LED starts to clip.
As clipping level comes, clip LED is
clipping and then, finally come to
the protection in RED light on.
Matching the output voltage of
the headunit’s
RCA line-outs to amplifier’s input.
GAIN ( 6V ~ 0.2V )
Select mode switch for input conenction
2CH or 4CH.
MODE
Control the high pass filter
frequency forthe speaker outputs.
When setting multiply x1, then
the frequencies can be
adjusted from 20Hz to 800Hz.
When setting multiply x10, then
the frequencies can be
adjusted from 200Hz to 8KHz.
Select HPF ON/OFF switch
HPF ( 20(200)~800(8K)HZ @ 12dB )
LPF ( 50(500)~800(8K)HZ @ 12dB )
Control the low pass filter
frequency forthe speaker outputs.
When setting multiply x1, then
the frequencies can be
adjusted from 50Hz to 800Hz.
When setting multiply x10, then
the frequencies can be
adjusted from 500Hz to 8KHz.
Select HPF ON/OFF switch

12V ( POWER CONNECTION )
Before mounting amplifiers, disconnect the negative ( - ) cable from your grounded battery to protect any
accidential damage to your awesome amplifiers and audio system.
Concerto series c3000.2D & c2000.4D amplifiers are designed to use 0 gauge power and ground connection.
Connect the power cables to power terminal + 12V.
Concerto series c3000.2D & c2000.4D amplifiers are not equipped with fuses because they do not like to be
bossed around. External fuses should be used.
Connect one end of fuse holder to the power cable going into the amplifiers and the other end of fuse holder to
positive battery.
This fuse location will protect the system and the vehicle against the possibility of a short circuit in the power cable.
Be sure to use fuses and fuse holder adequate for the application.
REM ( REMOTE )
Run a remote turn on cable ( at least 18 gauge ) from the switched + 12V source .
This may be a toggle switch, a relay, your source unit's remote trigger cables, or power antenna trigger cable.
Connect the remote turn on cable to the REM ( remote ) terminal.
GND ( GROUND )
Locate a secure grounding connection as close to amplifier as possible.
Make sure the location is clean and provides a direct electrical connection to the frame of the vehicle.
The ground needs to have as low of a resistance as possible.
Connect one end of a short piece of the same size cable as the power cable to the grounding point or to
one of your batteries or battery bank.
Run the other end of the 0 gauge cable to the mounting location of the amplifiers for connection to the
amplifiers ground terminals and connect the ground cable to the GND ( ground terminal ).
Remote Turn on
+12V SOURCE
Ground
Fuse Rating
c3000.2D : 250A
c2000.4D : 150A
BATTERY
+12V, GROUND, REMOTE CONNECTION DIAGRAM.

c3000.2D SPEAKER OUTPUT
This terminal connects Concerto series c3000.2D amplifier to your speakers .
Minimum speaker cable should be 12 gauge or larger since our amplifiers put out epic power.
Connect the speakers by checking the impedance as 1 ohm for STEREO or 2 ohm MONO
c3000.2D Speaker connection diagram i
c3000.2D Speaker connection diagram ii
c3000.2D working impedance
1ohm stereo or 2ohm mono.
8~2ohms
4~1ohms 4~1ohms
4~1ohms 4~1ohms

c2000.4D SPEAKER OUTPUT
This terminal connects Concerto series c2000.4D amplifier to your speakers .
Minimum speaker cable should be 12 gauge or larger since our amplifiers put out epic power.
Connect the speakers by checking the impedance as 2 ohm for STEREO or 4 ohm MONO
c2000.4D SPEAKER CONNECTION DIAGRAM i
c2000.4D SPEAKER CONNECTION DIAGRAM ii
8~4ohms
4~2ohms 4~2ohms
4~2ohms4~2ohms
4~2ohms 4~2ohms
4~2ohms4~2ohms
c2000.4D working impedance
2ohm stereo or 4ohm mono.

TROUBLE SHOOTING
NO SOUND ( NO OUTPUT )
@ Please check all connections, cables' rounting, short & voltage
@ Please check the fuses , If they are blown, please replace with new one.
@ Please check whether speakers work well, you can test speakers by connecting to
another amplifier
PROTECTION
@ Please check overload, overheat ( thermal ), short and voltage, DC offset.
@ c3000.2D minimum working impedance is 1 ohm stereo or 2 ohm mono.
@ c2000.4D minimum working impedance is 2 ohm stereo or 4 ohm mono.
@ If amplifier is shut down due to heat, it will be on some minutes later after cooling down.
Please make better airflow and no obstruction around amplifiers for thermal protection
@ When over 4V DC comes into amplifier , then, It will be DC protected.
Check whether amplifiers work after removing RCA-Input.
If amplifiers work, then check DC by checking RCA-input .
When DC is over 4V at input, try by replacing +12V source unit .
DISTORTION & NOISE
@ Readjust input level and check the speaker quality at another amplifier
Replace poor quality speakers with good quality ones
@ Check amplifiers and headunit’s ground contact. all grounds should be common.
@ Check Rca Jack, then repalce with new one or reroute Rca Jack.
@ Engine noise is caused by poor grounding of amplifiers, headunit, other components,
battery or alternator, so please check all grounding connection.
POOR BASS RESPONSE
@ Please check speaker cables and reverse polarity.

1 Year Limited Warranty
Crescendo Audio strives to satisfy every customer and make absolutely sure that every
customer is fairly taken care of in the rare event that your amplifier malfunctions.
Each new Crescendo amplifier is backed by a 1 year limited warranty from date of
purchase. A warranty authorized amplifier will be either replaced with a new unit or
repaired. Warranty does not cover accidental damage, improper installation/wiring,
misuse, abuse, car accident resulting in amplifier failure, failure due to natural disaster,
or third party amplifier modifications. This warranty is limited to the amplifier and
specifically excludes any incidental or consequential damages connected therewith.
Warranty is non-transferable from original owner provided that new owner can prove
date/place of purchase.
All warranty returns must be sent Crescendo Audio or our repair facility. Crescendo
Audio is not responsible for damage of a returned amplifier due to poor packaging not
suited for proper shipping. So make sure your amplifier return is packed in its factory
box or an equivalent!
For warranty inquiries/RMA requests please email us at [email protected]
or visit our website, www.crescendoaudio.com and enter your inquiry through the
contact us page.
You may also contact us va phone Monday - Friday at ( 941 ) 257 4767