bass clef series
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
SPECIFICATIONS
1ohm stable digital monoblock amplifiers
Two amplifiers linked to 2ohm
Frequency response : 10Hz ~ 270Hz
Signal to Noise Ratio : 95dB
Damping Factor : 450 <
Input sensitivity : 6V ~ 0.2V
Low pass filter : 35Hz ~ 250Hz @ 24dB / Oct
Subsonic filter : 10Hz ~ 50Hz @ 24dB / Oct
Bass Boost : 0 ~ 9dB @ 45Hz
Phase : 0 ~ 180 degree
Master/slave connection ( Strappable to 2ohm )
Remote level control is included
0 gauge power & ground terminals.
Working Voltage : BC2000D : 8.5V~16V, BC3500D & BC5000D : 8.5V~18V
External fuses rate : BC2000D : 200A ( 400A for linked )
: BC3500D : >300A ( >600A for linked )
: BC5500D : >500A ( >1000A for linked )
RMS OUTPUT POWER
BC2000D : 2000Watts at 1ohm RMS or 4000Watts strappable at 2ohm
BC3500D : 3500Watts at 1ohm RMS or 7000Watts strappable at 2ohm
BC5500D : 5500Watts at 1ohm RMS or 11,000Watts strappable at 2ohm.
1ohm stable Highly efficient and powerful Class D technology
Linkable monoblock technology for strapping 2 amps together.
3oz ( 4oz BC5500D ) 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
* Low & High battery voltage protection circuit
CONTROLS & CONNECTIONS
RCA INPUT :
Connect preamp signal cables from
the source or the headunit to RCA input
RCA OUTPUT :
Output RCA jack to another amplifier.
RCA INPUT & OUTPUT
POWER & PROTECT LED
Blue-lit shows correct operation.
Red-lit shows general malfunction, faulty
connection, or thermal protection.
Matching the output voltage of
the headunit’s
RCA line-outs to amplifier’s input.
GAIN ( 6V ~ 0.2V )
BASS BOOST ( 0 ~ 9dB )
The bass boost boosts frequency
centered at 45Hz.
REMOTE PORT
This port is for remote level control.
Plug remote control’s connector for
remote level control’s use.
Remote controls level from the driver’s seat.
Controls phase 0~180 degrees for fine
tunning your low end staging in your
vehicle or fully switching polarity
if inverting your woofers.
PHASE ( 0~180 DEGREE )
Control the high pass frequency for
the speaker outputs to eliminate
extreme low frequencies
SUBSONIC FILTER ( 10~50HZ @ 24dB )
Controls the low pass filter frequency for
the speaker output.
LOW PASS FILTER ( 35~250HZ @24dB )
Link connection makes 2 of same amplifiers linked to 2ohm
Set Output master / input slave switch to output master position for Master amp
which is connected to headunit.
Set Output master / input slave switch to input slave position for Slave amplifier
Connect RCA cable from RCA OUT at master amplifier to RCA IN at slave amplifier.
MASTER / SLAVE ( STRAPPABLE )
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.
BC amplifiers are designed to use 0 gauge power and ground connection.
Connect the power cables to power terminal + 12V.
BC 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 ).
Ground
BATTERY
Remote Turn on
+12V SOURCE
SPEAKER OUTPUT
This terminal connects the Crescendo BC amplifiers 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 single unit or 2 ohm for link connection.
LINK CONNECTION
INPUT CONNECTION ;
Step 1. Connect the master amplifier to the head-unit and set its output master / input slave
switch to output master.
Step 2. Set slave amplifier output master / input slave switch to slave input.
Step 3. Connect RCA cable from the master to slave amplifier as shown in the diagram.
+12V SOURCE
Fully adjusted signal is
transferred from master
to slave amp via Rca cable
MASTER AMPLIFIER
SLAVE AMPLIFIER
POWER & SPEAKER CONNECTION ;
Step 1. Connect speaker cable ( + ) on master amplifier to subwoofer ( + )
Step 2. Connect speaker cable ( + ) on slave amplifier to subwoofer ( - )
Step 3. Connect speaker cable ( - ) on master amplifier to speaker cable ( - ) on
slave amplifier
Remote Turn on
+12V SOURCE
8 ~ 2OHMS
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.
@ Minimum working impedance is 1 ohm for all BC amplifiers as single unit.
and 2 ohm stable for linked operation.
@ If amplifiers are shut down due to heat, they will be on some minutes later after cooling
down.
Please make better airflow and no obstruction around amplifiers for thermal protection
@ BC2000D’s working voltage is 8.5V ~ 16V
BC3500D & BC5500D’s working voltage is 8.5V ~ 18V.
@ When over 4V DC comes into amplifiers, then, they 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
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