Steg M.MSK130.4 User manual

Car Audio Power Amplifiers
USER'S GUIDE
M.MSK130.4
M.MSK200.2

• DO NOT DRIVE WHILE DISTRACTED. Any function that requires your prolonged attention should not be performed
while driving. Always stop the vehicle in a safe location before performing any such function. Failure to do so may result
in an accident.
• KEEP THE VOLUME AT MODERATE LEVELS WHILE DRIVING. Excess volume levels can obscure sounds such as
emergency vehicle sirens or road warning signals and may result in an accident. Continuous exposure to high sound
pressure levels may cause permanent hearing loss. Use common sense and practice safe sound.
• FOR USE WITH 12V NEGATIVE GROUND VEHICLE APPLICATIONS ONLY. Using this product other than in its designed
application may result in fire, injury or product damage.
•MAKE THE CORRECT WIRING CONNECTIONS AND USE PROPER FUSE PROTECTION. Failure to connect wiring
correctly with appropriate gauge and fuse protection may result in fire, injury or product damage . When replacing
fuse(s) in the unit, never exceed the specified rating. Ensure proper protection of all system power wiring and install an
external fuse (not included) with specified rating for each amplifier connected with the +12V lead at the battery terminal.
• DISCONNECT THE NEGATIVE BATTERY TERMINAL BEFORE INSTALLATION. Failure to do so may result in fire, injury or
damage to the unit.
• D O NOT ALLOW CABLES TO BECOME ENTANGLED IN SURROUNDING OBJECTS. Arrange wiring and cables to prevent
obstructions when driving. Cables or wiring that obstruct or hang up on places such as steering wheel, brake pedals, etc.
can be extremely hazardous.
• DO NOT DAMAGE VEHICLE SYSTEMS OR WIRING WHEN DRILLING HOLES. When drilling holes in the chassis for
installation, take precautions so as not to contact, puncture or obstruct brake lines, fuel lines, fuel tanks, electrical wiring,
etc. Failure to take such precautions may result in fire or an accident.
• DO NOT UTILIZE OR CONNECT TO ANY PART OF VEHICLE SAFETY SYSTEMS. Bolts, nuts or wires used in the brake,
airbag, steering or any other safety-related systems or fuel tanks should NEVER be used for mounting, power or ground
connections. Using such parts may disable control of the vehicle or result in fire.
WARNING
WARNING This symbol means important instructions.
Failure to heed them can result in serious injury or death.
CAUTION This symbol means important instructions.
Failure to heed them can result in injury or property damages.
• STOP USE IMMEDIATELY IF A PROBLEM OCCURS. Failure to do so may result in personal injury or damage to the
product. Return it to your authorized STEG dealer.
• HAVE AN EXPERT DO THE WIRING AND INSTALLATION. This unit requires special technical skill and experience for
wiring and installation. To insure safety and proper function, always contact the authorized dealer where you purchased
the product to have it done professionally.
• INSTALL THE UNIT SECURELY WITH SPECIFIED PARTS. Be sure to use only the included parts and specified installation
accessories (not included). Use of other than designated parts may damage this unit. Install the unit securely so that it
will not come loose during a collision or sudden jolt.
• ROUTE WIRING AWAY FROM SHARP EDGES AND MOVING PARTS. Arrange cables and wiring away from sharp or
pointed edges and avoid moving parts such as seat hinges or rails to prevent pinching or wear. Use loom protection
where appropriate and always use a grommet for any wiring routed through metal.
• NEVER RUN SYSTEM WIRING OUTSIDE OR UNDERNEATH THE VEHICLE. All wiring must be routed, secured and
protected inside the vehicle. Failure to do so may result in fire, injury or property damage.
• INSTALL THE UNIT IN A DRY AND VENTILATED LOCATION. Avoid mounting locations where the unit will likely be
exposed to high moisture or heat without adequate ventilation. Moisture penetration or heat buildup may result in
product failure. Always make sure the amplifier chassis temperature is safe before touching it.
• REDUCE GAIN AND SOURCE VOLUME TO MINIMUM LEVELS FOR INITIAL SYSTEM TUNING. Ensure amplifier power is
off before connecting signal cables and follow proper system gain setting procedures. Failure to do so may result in
damage to the amplifier and/or connected components.
CAUTION
1
Package Contents: Main Unit Accessories Required for
Installation (not included):
ŸRCA Interconnects
ŸPower/Ground/Speaker Wire
ŸIn-line Fuse Holder w/Fuse
ŸBattery Ring Terminal
ŸChassis Ground Terminal
ŸWire Crimp Connectors
ŸGrommets and Loom
ŸCable Ties
ŸMounting Screws

INTRODUCTION
Thanks and congratulations for choosing STEG for your audio amplification needs.
These amplifiers have been significantly improved throughout the years in order to
assure quality and reliability. The latest technology has been incorporated into every
product, providing you with incredible power and unparalleled sound quality. Our
highly developed and simplified circuitry contributes to low distortion and the
ultimate in efficiency. That's why we are sure that your new amplifier will provide you
with a sound value you can enjoy for years to come.
2
Note: All specifications are subject to change without notice
M.MSK130.4 M.MSK200.2
4Ω, 14.4V 130W x 4 200W x 2
2Ω, 14.4V 200W x 4 350W x 2
4Ω BTL, 14.4V 400W x 2 700W x 1
Frequency Response +0/-3dB, 1W, 4Ω <10Hz to >50kHz <10Hz to >50kHz
1W, 4Ω >81dBA >81dBA
Rated Pwr, 4Ω >102dBA >104dBA
Damping Factor 50Hz, 4Ω >125 >125
Distortion (THD+N) ½ Rated Pwr, 4Ω <0.05% <0.05%
>10kΩ>10kΩ
200mV-5V 200mV-5V
Fuse Rating End Panel, ATC 35A x 2 30A x 2
High-Pass (HPF) Rear CH: 50-200Hz, 12dB/oct. 50-200Hz, 12dB/oct.
Low-Pass (LPF) Rear CH: 50-200Hz, 12dB/oct. 50-200Hz, 12dB/oct.
Level Rear CH: 0 to +6dB 0 to +6dB
Freq (Fc) Rear CH: 45Hz 45Hz
Idle Current <1.1A <1.0A
Sleep Current <1.6mA <1.4mA
Operating Voltage DC Supply 8-16V 8-16V
15"x8.5"x2.3" 15"x8.5"x2.3"
380x216x59mm 380x216x59mm
Dimensions (LxWxH)
Specifications
Bass Boost
S/N Ratio
Crossover
Power Output (RMS)
Current Draw
Input Impedance
Input Sensitivity
15" (380mm)
8.5" (216mm)
2.3" (59mm)

3
WIRING CONNECTIONS & SETTINGS
It is important to read this manual thoroughly before starting your installation and always plan accordingly.
Before installing, disconnect the negative (ground) wire from the vehicle’s battery to avoid damage to the
vehicle or yourself. Following all guidelines will help provide years of enjoyment with your STEG amplifier.
Power Supply Terminal
Œ
Ground (GND): The ground terminal must be connected to a metal part of the vehicle with ground
Ÿ
plane back to the main battery ground attachment point (a.k.a. chassis ground). This wire should be as
short as possible, but no longer than 2ft (60cm), with minimum gauge of 4AWG. The ground wire
should be terminated with a ground specific or ring terminal and securely bolted to the vehicle with
star or lock washer and nut to prevent from coming loose. The chassis ground connection point
should be scuffed to the bare metal.
Remote Turn-on (REM): If the source unit has a remote output wire or if a switched ignition wire is
Ÿ
available, connect it to the REM terminal for turning on the amplifier.
ŸPower (+12V): The constant +12V power connection must be made at the vehicle main battery,
securely connected with a ring terminal and protected with an in-line fuse within 18in (45cm) from the
positive battery terminal. The M.MSK130.4 requires a 70A fuse and a minimum power wire gauge of
4AWG, while the M.MSK200.2 requires a 60A fuse with 4AWG wire. Do not install the fuse until all other
system connections have been made.
Fuses: These ATC fuses are to protect the amplifier and must be inserted for operation. When replacing

fuses, check for system wiring faults and always use the specified value for each fuse. The M.MSK130.4
model requires two 35A fuses, while the M.MSK200.2 requires two 30A fuses.
Speaker Output Terminal: Each (+) and (-) terminal pair per channel is for connecting the amplifier's
Ž
output to speaker(s) or subwoofer(s). Make sure to observe correct polarity and total impedance per
channel. The minimum nominal impedance is 2Ω per channel, or 4Ω for bridged connections.
RCA Inputs (INPUT): These RCA jacks are for left and right channel input signal connections from the

source. Use quality interconnects to ensure stable connection and minimize the possibility for induced
noise. Each channel requires a source signal input connection to provide output.
Turn-on Mode Select: This switch is for selecting which method is used for turning on the amplifier. The

default setting is for a switched +12V wire connected to the REM terminal. If a wired trigger is
unavailable, select either DC-offset or Audio signal detection for the appropriate automatic turn-on
mode. While auto turn-on will work in most applications, there may be some cases were a +12V trigger is
needed for satisfactory results.
Power/Protect LED (PWR/PRO): This LED indicates the amplifer status. Blue indicates the amplifier is on
‘
and in normal operation. Red indicates the amplifier is in protection mode, due to overheating, under-
voltage or output short circuit condition.
M.MSK130.4
M.MSK200.2
  ‘
  ‘
Œ
Remote
Turn-on
12V
<18in (45cm)
Chassis
Ground
4AWG
(min)
<2ft
(45cm)
Remote
Turn-on
12V
<18in (45cm)
Chassis
Ground
4AWG
(min)
<2ft
(45cm)
 Ž
Œ  Ž

4
4-Channel 3-Channel (Stereo + Bridged)
2-Channel (Bridged)
M.MSK130.4 Speaker Connection Examples:
2-Channel 1-Channel (Bridged)
M.MSK200.2 Speaker Connection Examples:
2Ω
(min) 2Ω (min)
4Ω
(min)
2Ω
(min)
2Ω
(min)
2Ω
(min) 2Ω (min)
4Ω
(min)
4Ω
(min)
2Ω
(min) 2Ω (min)
4Ω
(min)

5
TOP PANEL CONTROL SETTINGS
Gain Adjustment (GAIN): This adjustment is for matching the input sensitivity of the amplifier with the
Œ
maximum unclipped signal provided by the source. The 4-channel model M.MSK130.4 provides separate
gain adjustments for front and rear channels. Follow proper gain setting procedures to ensure optimum
source volume range with minimum chance for clipping or over-driving the speaker(s)/subwoofer(s).
Aside from music, a -10dBfs sine wave tone at a frequency between the chosen crossover points may
also be used during the tuning process to ensure proper headroom and gain overlap for typical music
recording levels. Readjustment may be necessary after any changes to crossover or bass boost settings.
Crossover Mode (X-OVER): This switch is available on the M.MSK130.4 model (rear channels only) and

the M.MSK200.2 and is for selecting the crossover filter mode as a high-pass (HP), a low-pass (LO) or
bypassed for full-range operation (AP). For smaller full-range or component speakers, use the high-pass
(HP) setting to filter out unwanted low frequencies. For woofers or subwoofers capable of reproducing
only lower frequencies, use the low-pass (LO) setting to filter out unwanted high frequencies as needed
above the chosen cut-off frequency.
Crossover Frequency (FREQ): This adjustment is available on the M.MSK130.4 model (rear channels
Ž
only) and the M.MSK200.2 and sets the crossover cut-off frequency (Fc) from 50Hz to 200Hz with a slope
of -12dB/oct. It is enabled when the crossover mode is selected as a either high-pass (HP) or low-pass
(LO). Use this adjustment to optimize speaker or subwoofer performance by limiting the frequency
response to what they can effectively reproduce and minimize the chance of being over-driven.
Bass EQ (BASS BOOST): This provides level adjustment of a single EQ band centered at 45Hz from 0dB

up to +6dB. Use this setting to achieve desired bass response without over-driving the
speaker(s)/subwoofer(s) or causing excessive amplifier output distortion.
Œ  Ž
M.MSK130.4
Œ
M.MSK200.2
Œ
 Ž 

Warranty & Service Care
GT Trading warrants this product to be free from manufacturing defects for a period of one (1) year from
original date of purchase. Under this warranty, Wāvtech will replace the defective product on behalf of GT
Trading with a new or remanufactured one at no charge.
For speakers and component sets, only return the defective part. Do not return the other speaker, tweeter
or crossover as they will be retuned back to you. This warranty covers manufacturing defects only.
Wāvtech will test each item received to verify there is a defect. If no defect is found, the item will be
returned to dealer. Items misused, altered, or neglected are not covered. Wāvtech will not be liable for any
loss, cost of repair or any other damage of any kind connected with the use, or repair of its products. All
warranty returns require pre-approval and Return Authorization.
For Service within the United States:
Wāvtech Customer Service: [phone]
Monday – Friday, 8:30am to 5:00pm MST
Important Notice for International Customers:
For products purchased outside the United States of America or its Territories, please contact your local
distributor concerning specific procedures for your country's warranty policy. International purchases are
not covered by Wāvtech, LLC.
6
Serial Number:
Installation Date:
Place of Purchase:

ITALY
Distributed in the Americas by Wāvtech, LLC
www.stegaudio-usa.com
GT Trading reserves the right to make modifications or improvements without notice thereof. The availability
of the products illustrated is subject to change. The described in this User's Guide represent just a part of the
STEG products available. All brands and trademarks mentioned have been used exclusively for description
purposes and all rights belong to the respective owners, total or partial.
STEG is the Property of GT Trading
©Copyright 2021 Wāvtech, LLC. All Rights Reserved.
1350 W. Melody Ave.
Suite 101
Gilbert, AZ 85233
[phone]