Sundown Audio SAX-125.4 User manual

9 dB/oct, variable bass boost
o
180 Variable phase shift
4 ways protection circuit
(thermal, voltage, speaker short and DC)
Wired remote control included
Digital class-D linkable/dual mono block amplifier
Dual MOS-FET PWM power supply
Stable into 1 ohm load
24 dB/oct, variable low pass filter
24 dB/oct, variable subsonic filter
Rated power output
( Tested voltage 14.4Volts )
- RMS power, 2ohm linkable/dual mono
- RMS power, 1ohm mono
- RMS power, 2ohm mono
- RMS power, 4ohm mono
Low pass frequency crossover
Shusonic filter
Bass boost @ 45Hz
Phase shift control
Frequency response
Input sensitivity
Signal / noise ratio
T.H.D @ 4ohm
Efficiency @ 4ohm
Fuse Rating
Dimensions ( Length ) inches
( 8.25 W x 2.32 H ) inches
All features are subject to change in the continuing effort to improve the products without notice.
SAZ-1200D
2400W
1200W
790W
480W
120A
12.20
SAZ-1500D
3000W
1500W
930W
530W
150A
16.53
SAZ-3500D
7000W
3500W
2500W
1350W
350A
24.40
SAZ-2500D
5000W
2500W
1500W
940W
250A
18.89
35Hz ~ 300Hz
10Hz ~ 60Hz
0 ~ 9dB
0 ~ 180 degree
15Hz ~ 270Hz ( +/- 1dB )
6V ~ 0.2V ( +/- 5% )
90dB
< 0.1%
86%

12 dB/oct, variable low pass filter
x1, x10 crossover multiply
4 ways protection circuit
(thermal, voltage, speaker short and DC)
Wired remote control included
Full range digital 4channel amplifier
High efficiency 4channel
Stable into 2 ohm stereo or 4 ohm mono
12 dB/oct, variable subsonic filter
12 dB/oct, variable high pass filter
Rated power output
( Tested voltage 14.4Volts )
- RMS power, 4ohm mono
- RMS power, 2ohm mono
- RMS power, 4ohm mono
Subsonic frequency crossover
High pass frequency crossover
High pass frequency multiply
Low pass frequency crossover
Low pass frequency multiply
Frequency response
Input sensitivity
Signal / noise ratio
T.H.D @ 4ohm
Efficiency @ 4ohm
Fuse Rating
Dimensions ( Length ) inches
( 8.25 W x 2.32 H ) inches
All features are subject to change in the continuing effort to improve the products without notice.
SAX-125.4
400W x 2CH
200W x 4CH
125W x 4CH
10Hz ~ 500Hz
50(500)Hz ~ 500(5K)Hz
x1, x10
50(500)Hz ~ 500(5K)Hz
x1, x10
20Hz ~ 20KHz ( +/- 3dB )
6V ~ 0.2V ( +/- 5% )
105dB
< 0.1%
70%
30A x 2
11.02

+12V Power
Connect the +12V terminal of the amplifier to the POSITIVE terminal of the battery using the same
diameter as the ground cable, making sure you install in-line fuse holder, approximately 300 or 400 mm.
From the POSITIVE terminal of battery, making sure that there is no fuse in battery holder.
GROUND
Disconnect the battery and connect the GND (ground) terminal to the car’s chassis.
Keep this cable as short as possible ( not longer than 20 inches or less ).
Making sure that the connection with the chassis is rust free and clear of paint or grime.
REMOTE
Connect the REM terminal of the amplifier to the power antenna terminal in the car ignition switch
using 12 or 16 ga electrical wire.
Caution
SAZ-1500D, SAZ-2500D & SAZ-3500D are not supplied with internal
fuse in themselves.
Make sure you install in-line fuse holder from Positive terminal of Battery
HEADUNIT
GROUND
BATTERY

Wired Remote Control
HEADUNIT
8~1ohms
8~2ohms 8~2ohms

Wired Remote Control

Using a dual amplifier configuration, the MASTER amplifier has total control over the SLAVE amplifier.
When using dual amplifier to operate subwoofer, the positive terminal of the subwoofer's voice coil
must be connected to the positive terminal of the MASTER Amplifier and the negative terminal
of the subwoofer's voice coil must be connected to positive terminal of the SLAVE Amplifier.
When hooking two amplifiers to it, please check the power handling capabilities of your subwoofers
if they are not exceeded.
8~2ohms
HEADUNIT
Remote turn on

FULL RANGE DIGITAL 4CHANNEL SPEAKER CONNECTIONS
SAX-125.4 3channel speaker connection mode.
Wired Remote Control
HEADUNIT
Passive
MidRange
/Bass
Tweeter
8~4ohms

SAX-125.4 4channel speaker connection mode.
Passive
MidRange
/Bass
Tweeter
SAX-125.4 4channel speaker connection mode.
Passive
MidRange
/Bass
Tweeter
8~4ohms

SUNDOWN amplifiers have protection features to prevent any damages from misuse or faulty conditions.
If SUNDOWN amplifiers sense excessive heat, short circuited speakers DC, or voltage the protection
indicator will light, and the system will be turned off.
In order to check the problem, you should turn all levels down and all power off and carefully check
the installation for wiring mistakes or short.
If SUNDOWN amplifiers shut down due to excessive heat, they will be working later when it is cooled
down. Before removing your amplifier, refer to the list below and follow the suggested procedures.
Check remote turn-on voltage at amplifier and headunit, when remote turn-on voltage is low or
no turn-on voltage, there is no sound.
Check fuses at the battery side or external fuses and all wire connections.
Check RCA Input is properly connecte
Please check POWER, GND and REMOTE wire connection and other wires properly connected.
When DC over 4V come into the amplifier, amplifier is DC protected.
Pls check whether amplifier work after removing RCA-Input. if amplifier work, then check DC by
checking RCA-Input. When DC is over 4V at input, try by replacing head-unit or source.
When amplifier is over-heated, Amplifier goes into the thermal protection. Amplifier will be back
to work after cooling down little bit. Please install amplifier in better ventilation and make it cool.
SAZ-1200D, SAZ-1500D, SAZ-2500D & SAZ-3500D have minimum working impedance as 1ohm
as single unit. Linkable connection is 2ohm.
SAX-125.4 minimum working impedance is 2ohm stereo or 4ohm mono.
Make sure Chassis and Remote use same GROUND
Please readjust amplifier input level which is printed on endplate.
Make sure good ground contact of amplifier or headunit.
Use sufficiently shielded RCA interconnects and good RCA routing.
Check all ground connections of all other audio equipments.
Check speaker wiring and reverse polarity.
NO OUTPUT
AMPLIFIER SHUT DOWN ( PROTECTION )
DISTORTION & NOISE
POOR BASS RESPONSE