CDT Audio SQA-2130 User manual

Owner’s Manual
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V1 1004
CDT Audiophile Fanatics In California USA
CDT Audio,Inc.
92 Second Street
Buellton, California
USA
Ph:1-877-568-3238
Fx:1-805-693-1898
Email:[e-mail]
WWW.cdtaudio.com
WWW.cdtgold.com
By
Design & Engineering

Amplifiers provide high-performance sound reinforcement for your mobile audio
equipment. Its versatility enables compatibility with optional Equalizers, Frequency
Dividing Network Crossovers, and other audio processors in a customized system. The
Multi-Mode bridging capabilities allow flexibility in hosting several different speaker
configurations.
To achieve optimum performance, We suggest that your stereo components are
installed by an authorized dealer. It is highly recommended that you read this Owners
Manual before beginning installation.
MOSFET POWER SUPPLY AMPLIFIER
GOLD PLATED BRASS SET SCREW TERMINALS
12dB/Oct. CROSSOVER
- VARIABLE HIGH PASS CROSSOVER 50Hz-500Hz or 30Hz-500Hz
- VARIABLE LOW PASS CROSSOVER 50Hz-500Hz or 30Hz-500Hz
VARIABLE 24dB/Oct. SUBSONIC FILTER 50Hz ~ 100Hz or 15Hz-45Hz
5 WAY PROTECTIONS
DAISY CHAIN THROUGH OUTPUT RCA
POWER AND PROTECTION LED
SOFT START / MUTE CIRCUIT
TRIMODE OUTPUT CONFIGURATIONS
2 OHM STABLE CIRCUITS
- 1 -
INTRODUCTION
FEATURES - CLASS AB AMPLIFIER
FEATURES - CLASS AB MONO AMPLIFIER
- 2 -
WARNNING
PLANNING YOUR SYSTEM
High powered audio systems in a vehicle are capable of generating “Live Concert”
high levels of sound pressure. Continued exposure to excessively high volume sound
levels may cause hearing loss or damage. Also, operation of a motor vehicle while
listening to audio equipment at high volume levels may impair your ability to hear
external sounds such as; horns, warning signals, or emergency vehicles, thus
constituting to a potential traffic hazard.
Before beginning the installation, consider the following:
a. If you plan to expand your system by adding other components sometime in the
future, ensure adequate space is left, and cooling requirements are met.
b.
Your Amplifier has been designed to accept Low-Level (Pre-Amp outputs from
your radio) signal source.
If your radio/source is equipped with Pre-Amp outputs. it is possible to utilize them
to drive the Amplifier and connecting (Amplifier) to the 2 rear speakers.
Then, use the built-in power of your radio to drive the 2 front speakers.
Distortion level is considerably lower from Pre-Amp (Low Level) outputs, than
speaker (High Level) outputs.
c. Are your components matched? The peak power rating of your speakers must
be equal or greater than the Amplifier’s. They also must be 2 - 8 Ohms impedance.
(This information is normally printed on the speaker magnet)
d. Consider both the length of your leads, and routing when determining the
mounting location. Pre-Amp input Jacks require a length (depending on location)
of high quality shielded male to male RCA patch cord.
NOTE:
MOUNTING YOUR AMPLIFIER
The mounting position of your Amplifier will have a great effect on its ability to
dissipate the heat generated during normal operation. It has an ample heat sink for
heat dissipation, and also designed with a thermal shut-down protection circuit,
making it reasonably tolerant of mounting variations. Any configuration which allows
moving air to be directed over the cooling fins will improve heat dissipation dramatically
DO NOT enclose the amplifier in a small box or cover it so that air cannot flow
around fins.
Temperatures in car trunks have been measured as high as 175°F(80°C) in the
summer time. Since the thermal shut-down point for the Amplifier is 185°F(85°C), it is
easy to see that it must be mounted for maximum cooling capability. To achieve
maximum advantage of convection air flow in an enclosed trunk, mount the amplifier
in a vertical position, on vertical surface.
MOUNTING SURFACE
Cooling requirements are considerably relaxed when mounting inside the passenger
compartment since the driver will not often allow temperatures to reach a critical
point. Floor mounting under the seat is usually satisfactory as long as there is at least 1
inch (2cm) above the Amplifier’s fins for ventilation.
a. Select a suitable location that is convenient for mounting, is accessible for wiring,
and has ample room for air circulation and cooling.
b. Use the amplifier as a template to mark the mounting holes. Remove the Amplifier
and drill 6 holes. USE EXTREME CAUTION, INSPECT UNDERNEATH SURFACE
BEFORE DRILLING.
c. Secure the Amplifier using the screws provided.
VARIABLE 0dB TO 12dB BASS BOOST AT 45Hz
MOSFET POWER SUPPLY AMPLIFIER
DOUBLE SIDED THROUGH HOLE EPOXY PCB
GOLD PLATED BRASS SET SCREW TERMINALS
24dB/Oct. CROSSOVER
- VARIABLE LOW PASS CROSSOVER (50Hz-250Hz)
VARIABLE PHASE SHIFT 0 ~ 180
VARIABLE 24dB/Oct. SUBSONIC FILTER 15Hz ~ 45Hz
5 WAY PROTECTIONS
DAISY CHAIN THROUGH OUTPUT RCA
BASS REMOTE CONTROL
1 OHM STABLE CIRCUIT
SOFT START / MUTE CIRCUIT
POWER AND PROTECTION LED

- 3 - - 4 -
CONNECTING THE POWER
CAUTION
AS A PRECAUTION, IT IS ADVISABLE TO DISCONNECT THE VEHICLE’S BATTERY BEFORE MAKING CONNECTION TO
THE + 12 VOLT SUPPLY WIRING.
4 GAUGE(Thicker if planning for additional Amplifiers)wire is recommended for
both the power and ground wires. 18 Gauge, for the remote turn-on wire. Both
types available at most Mobile Audio Dealers or Installation Shops.
GROUND :
To Vehicle Chassis
To avoid unwanted ignition noise caused by ground loops, it is essential that the
Amplifier be grounded to a clean, bare, metal surface of the vehicle’s chassis.
NOTE
GROUND WIRE SHOULD NOT BE EXTENDED MORE THAN 3 FT. (1 METER).
USING THIS METFOD CAN CAUSE TURN ON AND TURN OFF TRANSIENTS (NOISE)
+12 Volt(Fused) Constant Power : To Battery (+)
Due to the power requirements of the Amplifier, this connection should be made
directly to the positive (+) terminal of battery. For safety measures, install an in-line
50 Amp Fuse Holder (not included) as close to the battery positive (+) terminal as
possible .
With an ampere rating not to exceed total value of fuses in amp.
Remote Turn-On Input : :
To Power Antenna output of Car Stereo
This Amplifier is turned “ON” remotely when the vehicle’s stereo is turned “ON”.
NOTE
IF YOUR RADIO DOES NOT HAVE A +12 VOLT OUTPUT LEAD WHEN THE RADIO IS TURNED ON, “RMT” TERMINAL ON
THE AMPLIFIER CAN BE CONNECTED TO VEHICLE’S ACCESSORY CIRCUIT THAT IS LIVE WHEN THE KEY IS “ON”.
Chassis
Ground
(-)
FUSE Holder
Near
Battery
Remote Turn ON
To Power Antenna
Battery
OPERATION
RCA Low Level Input Jacks
lt allows left and right inputs to be connected to the amplifier using RCA plugs.
RCA Line Output Jacks
Full range output from channel L&R inputs is provided at Line Out Jacks.
Input Level Control
It allows for the adjustment of the gain of both channels to match the output level
of the source. In addition, it allows for detailed adjustment with L&R level control
to be separated.
X-over switch
a) LPF : Allows for the control of the low pass frequency range
(30Hz-500Hz) by using the Low Variable Control.
b) FULL : Allows for full range pass through.
c) HPF : Allows for the control of the high pass frequency range
(30Hz-500Hz) by using the High Variable Control.
Subsonic Filter
It admits of removing the frequency below 10Hz to 100Hz using the Subsonic
Variable Control in order to protect subwoofer speaker or to produce powerful
subwoofer sound.
Power LED
- lt indicates when amplifier is on and no fault existence.
Protection LED
lt illuminates when fault condition exists, and amplifier immediately shuts down.
lf illuminated, turn amplifier off, check for shorted speaker leads and DC noise
from RCA input and attempt to re-power amplifier.
Speaker Terminal - It allows the connection of speakers to the amplifier.
Power connection - Connects +12VDC power wire from the battery.
Fuse
It protects both the amplifier and automobile electrical system from fault conditions.
Multi times x-over switch - It can make the x-over freguency range to x 1 or x 10 times
Phase Shift - It can adjust the phase shift 0˚ ~180˚.
Hi-Input - It allows Hi-Input to be connected to the amplifier
Adjust the sub boost level of the selected frequency output from 0dB to 18dB.
Bass Boost
a) F&R : Allows for the Front & rear input.
b) F : Allows for the Front input only in case of using 2 channel input only.
Input Mode Selector
Remote connecton

OPERATION
- 5 -
SPECIFICATIONS
- 6 -
POWER OUTPUT DC(14.4V)
RMS AT 4 Ohm 130W X 2Ch
RMS AT 2 Ohm 175W X 2Ch
RMS AT 1 Ohm(MONO)
S/N RATIO>100dB
THD (IHF-A)0.03%
CHANNEL SEPARATIONS>55dB
INPUT SENSITIVITY 0.1V - 8V
INPUT IMPEDENCE 47 KOhm
SLEW RATE 10V / sec
DAMPING FACTOR200AT 4 Ohm
FUSE RATING25A X 2EA
* WIDTH 230.3 mm
* HEIGHT 55.0 mm
* LENGTH 350.0 mm
DIMENSION
MODEL
SPEC. SQA-2130
µ
75W X 4Ch
120W X 4Ch
>100dB
0.03%
>55dB
0.1V - 8V
47 KOhm
10V / sec
200 AT 4 Ohm
30A X 2EA
230.3 mm
55.0 mm
350.0 mm
SQA-4075
µ
500W X 1Ch
800W X 1Ch
1100W X 2Ch
RMS AT 4 Ohm , MONO 350W X 1Ch 200W X 2Ch
>100dB
0.03%
>55dB
0.2V - 6V
47 KOhm
10V / sec
200 AT 4 Ohm
20A X 4EA
230.3 mm
55.0 mm
450.0 mm
SQA-1000
µ
CDT Audio,Inc.
Tech Support Call
92 Second Street
Buellton, California 93427
Toll Free:1877-568-3238
Email:[email protected]
RCA Low Level Input Jacks
RCA Line Output Jacks
It allows for the adjustment of the gain of both channels to match the output level
Input Level Control
It admits of removing the frequency below 15Hz to 45Hz using the Subsonic
Variable Control in order to protect subwoofer speaker or to produce
powerful subwoofer sound.
Adjust the sub boost level of the selected frequency output from 0dB to 18dB.
It indicates when amplifier is on and no fault existence.
of the source. In addition, it allows for detailed adjustment with1&2CH level control
to be separated.
Bass Boost
you can control Remote Gain, conneeting the Remote control to Amplifier.
Remote Gain Control
Adjust the crossover frequency of the low pass from 30Hz to 250Hz
Variable Low Pass cross over control with ON/OFF S/W.
Variable Phase shift
Power LED
Protection LED
Variable Phase shift 0 to 180
It illuminates when fault condition exists and amplifier immediately shuts down.
It indicates when amplifier is on and no fault existence.
If illuminated, turn amplifier off, check for shorted speaker leads and CD noise from
RCA input and attempt to re-power amplifier.
Subsonic Filter
Speaker Terminal
It allows the connection of speakers to the amplifier.
Power connection
Connects +12VDC power wire from the battery.
Fuse
It protects both the amplifier and automobile electrical system from fault conditions.
Remote connection
Connects the control wire which allows the amplifier to be turned on and off by the
radio cassette player.
Connects ground wire from a suitable ground point on the chassis.
lt allows left and right inputs to be connected to the amplifier using RCA plugs.
Full range output from channel L&R CH inputs is provided at Line Out Jacks.
110W X 4Ch
150W X 4Ch
300W X 2Ch
>100dB
0.03%
>55dB
0.1V - 8V
47 KOhm
10V / sec
200 AT 4 Ohm
40A X 2EA
230.3 mm
55.0 mm
450.0 mm
SQA-4100
µ