Massive Audio, Inc.
P.O. Box 252004
Los Angeles, CA 90040 U.S.A.
www.massiveaudio.com
V.072507
INTRODUCTION:
Congratulations！
Thank you for purchasing the MASSIVE F LATLINE, a n eight-channel, highperformance, line-output converter. This unique product will ac ce pt two, four, six
or eight channels of sp ea ke r- le ve l signal from a factory-installed amplifier o r
source uni t and c on ve rt it to a high-quality, low-noise pr e- am p signal. N ow you
own an ideal OEM (Ori ginal Equipment Manufacturer) interface component which
will al lo w you to use your factory-installed source un it but gi ve you the ability t o
add aftermarket amplifier(s) and p ro ce ss or (s )．You will definitely e nj oy how gr ea t
the FLATLINE will make your performance system sound.
MASSIVE pr od uc ts a re the result of advanced craftsmanship w hi ch u se s the
highest quality components an d strict quality control st an da rd s in order to
provide you with a long joyful listening journey．
Please read t hi s manual th or ou gh ly to ensure t ha t you c an get the maximum
benefit from this new component． Whe n installed pro pe rl y， this un it will
provide with you years of trouble－free p er fo rm an ce ． To install and use this
component properly， please record the f ol lo wi ng information which wi ll help
you protect yo ur investment．
8-Channel Mixed Signal OEM Input/Output
Speaker-level Inputs – Will accept 300+ watts of signal!
Signal-auto-sensing Inputs
Selectable Summed Output
Selectable Remote Controlled Input/Aux
Level Matching Controls
Built-in 9V Line Driver．
Input For Optional Subwoofer Level Control
Adjustable Input Level and Summed Indicator
Amplifier
Model ＃：＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿
Dealer name：＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿
Date o f pu rchase：＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿
Installat ion an d da te ：＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿place
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sourc unite
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FLATLINE FUNCTIONS
１ RCA audio-output
Connect high quality RCA connectors from these outputs to the inputs of your amplifiers. While
we won’t get into the discussion as to whether plutonium cables sound better than un-obtainium
cables but we will tell you that well-constructed cables are less problematic in rugged
environments like your car．Connect your amplifier correctly which means plus to plus and
minus to minus, left-CH to left-CH and right-CH to right-CH, According to the indication on
the cover.
2 AUX－Input
Connect with the remote component. It receives remote control signals and aux-in audio signals
from the remote device.
3 Summing & grounding switch
Remove the cover, you can place the switch on or off as you like by consulting the instructions on
the cover. Under the cover are connection switches that allow the Main outputs of the FLATLINE
to receive signals from the inputs of Channel pairs B, C, and/or D. These switches allow you to
select what input signals will be summed into the main output. When one of the switches are in the
Summed position, the corresponding red indicator light on the front of the FLATLINE will be
illuminated.
The grounding switch is for setting different ground modes to avoid ground loop noise. If you have
ground noise trouble, you may change the setting to solve this problem. The default value is set to
200 Ohm.
４ Aux level Control
Adjust the output level of each channel for Aux-In device. These knobs allow you to set different
output levels for each channel when you switch the input from main to Aux-input.
5 Power indicator
Indicator light for the power. It will be lit when FLATLINE is on.
8 Speaker-Level Inputs
FLATLIN E is designed to acc ept an am plifi ed, speaker-level s ignal f rom a fac tory source unit
or ampl ifier. You will w ant to refe r to a f actor y service m anual o r wirin g-har ness sche matic t o
deter mine whi ch wires are the speaker wire s f or your system. If you are unsur e w hich wir es
are th e s peake r wire s, it is r ecomm ended you look at the color of the speaker wi re con necte d
to the sp eaker s a nd fol low them back to the facto ry sourc e or ampl ifier. Conne ct the sp eaker
wires t o the Spe aker-Lev el Inpu ts on you r FLATLIN E.
The F LATLINE has an au to-se nsing turn func tion, it w ill a utoma tical ly st art w orkin g whe n
the s ignal is avai lable on chan nel-A inp ut. P lease connect inpu t to cha nnel- A if you want to
activ ate thi s funct ion.
9 Power and remote connector
FLATLINE can be switched on and off automatically with the source unit. Remote-In should be
connected to the source units Remote-Out terminal and will power on the FLATLINE when the
source unit is active. When the source unit does not have an active remote out signal the
FLATLINE can start working automatically when there is a signal on channel A input (RCA signal
must have 2 volt minimum for turn on). The FLATLINE will also automatically turn off if there
is no signal for more than 14 seconds.
Remote out signal will activate when FLATLINE is on. You can use this signal to turn on/off after
the amplifier installed by connecting this signal to amplifier’s remote in terminal.
The +12V and Ground terminal is the main power supply for the FLATLINE, A 10A inline fuse
must be installed near the battery “+” terminal of 20CM, the ground terminal should be connected
to a massive grounding point of car chassis.
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10 Aux-in terminal
You can enjoy music from your Mp3, I-PODTM and other source units by easily pluging into this
3.5mm input terminal.
6 Summing indicator
Summing indicator light. These indicator LED’s let you know which channels are being summed
into the main inputs.
7 Level controls
You can match your aftermarket amplifiers input level with the factory-installed source unit or
amplifier level by tuning these knobs.
11 Aux-in selector
Select the signal path from the main input or AUX input by pressing this button.
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12 Aux input level control
Adjust the Aux input main level. This function lets you easily adjust aux-in volume by tuning this
knob.
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· Massive Audio, Inc. warrants all manufactured products to be
free from defect in material and workmanship for a period not
to exceed TWO YEARS* from the date of original purchase
when installed by an authorized “Massive Audio” dealer.
Units that are not installed by an authorized “Massive Audio”
dealer maintain a warranty not to exceed 90 days from the
original purchase date by the original purchaser.
· Products that display abuse such as power deficiency, over
driving the processor or clipping the input require
purchase of new PCB for replacement.
· “Massive Audio” obligations under this warranty are limited to
repairing or replacing, at its own sole option, any such
defective products. This warranty does not apply to equipment
that has been damaged by accident, negligence, or
misapplication or has been altered or modified in anyway.
This warranty applies only to the original purchaser who must
have properly registered the product within 10 days of
purchase.
Except as provided herein, Massive Audio, Inc. makes no warranties or
representations, express or implied, including any warranty implied by
law, whether for merchantability or fitness for a particular purpose and
shall be effective only for the period that this express warranty is
effective. SEE THE WARRANTY REGISTRATION CARD TO
ADDITIONAL INFORMATION.
FLATLINE FUNCTIONS
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B-SUM B-SUM B-SUM
Grounding
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