GAS MAD A1 User manual
MAD
MADE TO PLAY LOUD
A1-70.2 / A1-70.4
MAD
WE PLAY LOUD!!
We know what you want. You want it LOUD, and that’s
exactly what we do, what we live for. Vibrations,
gut-punches and straight up loud music - that’s what
makes us tick. We won’t dress up in fancy words or
claim to be something we’re not. We are the NO
BULLSH!T car audio brand!
Every single product with the GAS logo on it is born
out of passion, the same that has driven us for two
generations and that will keep us rolling up to your
neighbourhood, winning and pushing the limits for
many generations to come!
It’s up to you to choose your own level of loud, and if
you don’t like what we do that’s OK. You are welcome
We don’t exclude, we don’t judge and we do not make
up any excuses for who we are.
We are GAS and we are proud to be LOUD!
TABLE OF CONTENT
SAFETY..................................................................................................
UNPACKING........................................................................................
DIMENSIONS..............................................................................................
SPECIFICATIONS.................................................................................
MAD A1-70.2.....................................................................................
MAD A1-70.4.....................................................................................
Recommended cable sizes...............................................................
FUNCTIONS..............................................................................................
Indicator / HPF / Crossover..............................................................
LPF / Input / Output..........................................................................
Bass EQ / Level / Ground / Remote....................................................
Power / Fuse / Speaker outputs........................................................
HOW TO.........................................................................................................
Install amplier................................................................................
Connect speakers............................................................................
Tweaking & settings.........................................................................
TROUBLESHOOTING......................................................................................
No power..........................................................................................
No sound..........................................................................................
Unwanted noise...............................................................................
Distortion....................................................................................
Protection...................................................................................
WARRANTY & DISPOSAL...............................................................................
THE GAS WORLD...........................................................................................
3
4
4
5
5
5
6
7
7
8
9
10
11
10
16
18
23
23
23
23
23
23
24
25
SAFETY
3
Make sure to pay attention to the instructions when you see this symbol:
Make sure that your vehicle has a 12 VDC voltage negative ground system, that it can
handle an increased power consumption, and that both the alternator and the power
source are healthy and up to the task.
Don’t install the amplier inside the engine compartment or any other surface that
may be compromised by water or dirt. Your amplier will produce heat so make sure
it’ll have sucient air circulation (4-5cm open space on all sides).
Keep the cables inside the vehicle separate from sharp edges or components that may
be affected or take damage. Follow the recommended cable sizes and always use high
quality cables and accessories. Even if you are eager to put the amplier to use – take
no shortcuts when installing the cables, make sure that all connectors are protected
and secured, and take your time nding the perfect grounding point.
Don’t drill any holes without checking what lies beneath, and don’t cut anything
without making sure that no important components risk being damaged.
There’s a rst time for everything, if you need help - ask a friend or contact your local
GAS AUDIO POWER dealer/installer.
We want you to experience your product’s MAD sound, but we don’t want you to injure
yourself or others. Use common sense, respect high pressure levels and volume, and
follow your local laws and regulations.
you read through the manual thoroughly and follow the instructions. Save the
manual for future usage and reference!
UNPACKING
We know you’re excited to dive head rst into installing your new amplier, but before you
do: Make sure that the amplier and all the accessories are included in the packaging.
4
DIMENSIONS
A
B
C
E
D
A1-70.2
A1-70.4
A B C D E
mm
mm
252
312
232
292
195
195
209
209
55
55
Amplier
(1pc)
Manual
(1pc)
Screws
(4pcs)
Fuses
(1 or 2pcs)
HI input cable
(1pc)
SPECIFICATIONS
5
We take pride in our work! True, honest specications and power ratings are an important
part of all ampliers. Listening, measuring and engineering are essential parts in our
workshop. That’s how we make sure to bring you an awesome product with NO BULLSH!T.
Component
Topology
Class AB
MAD A1-70.2
Channels Two
Input mode
Power RMS (4 Ohm)*
Bridged Power RMS (4 Ohm)*
Frequency response
Low Pass Filter
High Pass Filter
Power RMS (2 Ohm)*
2 Ch
2x70W
1x220W
15-22000Hz
50-4000Hz
50-4000Hz
2x105W
S/N ratio (A-weighted)
Bass EQ
>98dB
0-12dB @ 45Hz
Crossover slope
Power/REM voltage
12dB
10-16V
Input sensitivity 0.5-6V
T.H.D
Damping Factor
<0.5%
>130
Power Fuse 1x35A
High level input
RCA line out
Yes/ATO
Yes
CLIP Yes
Bass Remote N/A
Linkable N/A
Component
Topology
Class AB
MAD A1-70.4
Channels Four
Input mode
Power RMS (4 Ohm)*
Bridged Power RMS (4 Ohm)*
Frequency response
Low Pass Filter
High Pass Filter
Power RMS (2 Ohm)*
4 Ch
4x70W
2x220W
15-22000Hz
50-4000Hz
50-4000Hz
4x105W
S/N ratio (A-weighted)
Bass EQ
>98dB
0-12dB @ 45Hz
Crossover slope
Power/REM voltage
12dB
10-16V
Input sensitivity 0.5-6V
T.H.D
Damping Factor
<0.5%
>130
Power Fuse 2x35A
High level input
RCA line out
Yes/ATO
Yes
CLIP Yes
Bass Remote N/A
Linkable N/A
*Guaranteed Minimum Certied
Power @ 14.4V >1% THD
*Guaranteed Minimum Certied
Power @ 14.4V >1% THD
SPECIFICATIONS
6
Power cable 8AWG (10mm
Speaker cable
REM cable
4AWG (20mm
14AWG (1,5mm 12AWG (4mm
18AWG (0,75mm 12AWG (4mm
Power cable 4AWG (20mm
Speaker cable
REM cable
4AWG (20mm
14AWG (1,5mm 12AWG (4mm
18AWG (0,75mm 12AWG (4mm
RECOMMENDED MINIMUM SIZE MAX SIZE
MAD A1-70.2
RECOMMENDED MINIMUM SIZE MAX SIZE
MAD A1-70.4
RECOMMENDED CABLE SIZES
The MAD ampliers are made for the people out there who don’t care about the haters, we
are proud to play LOUD! But to play LOUD you need a lot of power, which is why you have
bought this awesome A1 amplier. We know you’re itching to start building your new sound
system, but make sure to read through these pages - so you can get the most out of your
drivers! Take note that the feature placement might differ between the amplier models.
7
FUNCTIONS
POWER/PROTECT INDICATOR
Example: A1-70.2
POWER - PROTECT.
Power = Glows white
when the amplier is
connected and on.
Protect = Glows red
when the amplier in-
dicates a failure.
If it glows red, read
TROUBLE SHOOTING.
Example: A1-70.2
Follow the HOW
TO instructions
HPF. Limits the output
below selected freq-
uency.
HIGH PASS FILTER
CLIP INDICATOR
Example: A1-70.2
CROSSOVER
MODE. Choose the type
of crossover to use:
High pass, Fullrange or
Low pass setting.
Example: A1-70.2
Follow the HOW
TO instructions
CLIP. When distortion
exceeds 1%, the CLIP
indicator glows orange.
If it glows static, read
HOW TO instructions.
8
FUNCTIONS
LOW PASS FILTER
LPF. Limits the output
above selected freq-
uency.
Example: A1-70.2
Follow the HOW
TO instructions
HIGH LEVEL INPUT
HI INPUT. Used instead
of low level input/RCA to
connect speaker output
directly to the head unit.
Never use high level
and low level input
at the same time!
Example: A1-70.2
LOW LEVEL OUTPUT
OUTPUT Left - Right.
Send original signal to
a second amplier.
Example: A1-70.2
LOW LEVEL INPUT
INPUT Left - Right.
Connects to your head
unit’s RCA outputs.
Example: A1-70.2
9
FUNCTIONS
BASS EQ
BASS EQ. Boosts the
bass at 45Hz, Variable
between 0-12dB.
Follow the HOW
TO instructions
Example: A1-70.2
LEVEL (GAIN)
LEVEL. Sync your head
unit’s output signal
with the amplier.
Follow the HOW
TO instructions
Example: A1-70.2Example: A1-70.2
GROUND
GND. Terminal input
connector for ground
cable ( - power cable).
The GND cable must
be in direct contact
to the vehicle chassis
or the power source’s
neg. (-) binding post.
REMOTE
REM. Terminal input
connector for the unit
that controls the turn-
on signal.
Example: A1-70.2
This manual suits for next models
2
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