Soundstream MTUBE-8 Programming manual

MTUBE-8
Professional Dual-VaIveITube
Pre-Amplifier-Driver
Unit
Owner's Manual
and
InstallationGuide

You now ownthe Soundstream MTUBE-8 Pre-Amplifier,theproductof an
uncompromisingdesignand engineeringphilosophy. Your
Soundstream MTUBE-8
Pre-Amplifier Will outperform any other parametricequalizerinthe world.
To maximizethe performanceof your system, we recommendthat you thoroughly
acquaintyourself with itscapabilitiesandfeatures. Pleaseretainthis manualand
your sales receiptfor future reference.
Soundstream Pre-Amplifier is the result of American innovation and the
highest quality control standard. When properly installed, they will provide you
with many years of listening pleasure. Should your Pre-Amplifier ever need
service or replacement due to the theft, please record the following information
which will helpprotectyour investment.
Modeland Serial #
Dealer's Name
Date
of Purchase
InstallationShop
InstallationDate
CAUTION!
Prolonged listening at extremely high levels may result in hearing
loss. Eventhough your car audio system with your new
Soundstream
MTUBE-8 Pre-Amplifier sounds better than
anything you've ever heard, exercise cautionto prevent hearing
damage.

I
USING THE M-TUBE TO ITS WITHOUTFULLEST POTENTIAL
1
Inordertoutilizethefullcapacityofthisunit$ issuggestedthatyou
read this section from beginning to End and then if you still have
questions,ourTechassistdepartmentpersonnelcanhelp.
1
The M-TUBEis avery uniquedevice. Not only does it provideyou
I
i
with extendedrangeaudio,faithfullypreservingandreproducingallof
the original detail
& nuances but it also has some pretty unique
features.With this device,you have the ability to either[a] maintain
separate FRONT[Line] and REAR [aux] inputs and outputs or[b]
utilizeeither of the line/aux.inputs,to obtain outputs on both Front &
Rear plus Sub,with full fader control.Please see the expanded
functionaldescriptionsbelow.
A]
Using the line input only [place linelaux switch in
" IN"
position1,the following is realized -there would be no output on the
Rear channels but there would be outputs on both Front
& Sub
sections. At this time the input
" select " switch is in the
" IN"
position,movingthis switchtothe out position,willproducean output
onthe Rear channelsaswell.The fadercontrol functions in favour of
"F" orFront.
B]
Using the Auxiliary input only [placeline / aux switch in the
" OUT" position] ; thefollowingis realized-therewould benooutput
onthe Front channels butthere would be outputsonthe Rear
& Sub
sections. At this time, the
" select" switch is inthe " IN" position;
movingthis switchto the out position, will cause ALL outputs
to be
turned-off, there'd be no output whatsoever on any channels. The
fader controlfunctions inthefavour of
" R" or Rear. .. butthere's no
USING THE M-TUBE TO ITS WITHOUTFULLEST POTENTIAL
C] Usingtwo sets of inputsonbothlineandauxiliary [thelinelaux
switch can be either in or out],the following is realized-theprogram
material [music or other audio] presented on the aux. input will be
available onthe Rear
& Sub channels,whilethe materials presented
tothelineinputswill beavailableonthe Frontchannelsexclusively. At
thistime,both switches line
& aux are in the "IN" position,if the
" select" switch [only] is now placed inthe
" OUT" position,the
line-input channels' program material,will now be available on ALL
outputs
, therebyeffectivelyswitchingoff or cancelingtheaux. inputs.
The fader control functions to
" balance" between line or " F"
and auxiliary or
"R" .
What arethe benefitsof the abovefeaturesyoumay ask: Well, for the
first time, you can incorporate a preamplifier to enhance the entire
system butstillmaintain
a separationbetweentheFrontchannelsand
the Rear channels
, ifthis is your preference.That way, you can add
pre or post equalization and or crossover functions to either Front
and/or Rear without affectingthe other! This isjust one example,the
onlylimithereisyour imagination..notethatwhileequalizationcanbe
added pre or post the preamplifier's processing we suggest that
crossover functionsbe added after or postpreamplifier processing.

FEATURES
Thesubwooferoutputisanadditionalconveniencewhenyou
I
wishtoaddsubwooferstoyouraudiosystemto
greatlyenrichthebasssound.
FRONT PANEL CONTROLS
Itwillperformwithanyunitoperatingina 12 voltnegativeground
electricalsystem.
1. FADER CONTROL
This control adjuststhe volume between
thefront and rear speakers ina 4 speaker system.
ProfessionalDual-Valve
1 Tube Pre-Amplifier - Driver
Exceptionallyhigh co-channelseparation
Harmonicfeed-back loop control circuitry
Doublesided low resistancecopper-clad PCB
Cool-glow, dual colortube window
Dedicatedlineinput
- Frontoutput
Assignableauxiliary input
- Front / Rear output
Variable phase/time-lag control (0-1 80)
Separate Subvolume control (30 HZ
- 160HZ)
Mastervolume control
Platinuminput
& output RCAconnectors
3 positionselectable
(-) audio reference.
Independentlyvariable Left
& Right(post source) input
controls
2. VOLUME CONTROL
This control adjuststhe output level
3. SUBWOOFER VOLUME
This control adjusts output levelof subwoofer.
4. SUBWOOFER FREQ.
This control selectsubwoofer frequency
40 or 150Hz
5. INPUTSELECTOR SWITCH
This switch select the LINE input or AUX
input
6. TWO CHANNEL OR FOUR CHANNEL
Two Channel or Four Channel select switch
This switchselect,Two Channelor Four
Channel
ouput.
I 7. PHASE INVERTER CONTROL
1
Setting this knob tothe 180 position and shifts the
subwoofer outputs signals
180 degrees out-of-phase
relative
to thefront and rear output signals.

ELECTRICALINSTALLATION
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Bkk to Car Chassk
Mm amplmer lor
ruh-mler output I I I I
Real
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rpsarr
Rear Dutpul
NOTES: Set your sourcevolume at one -half to three quarter
upandleaveit.
Always useyour volume as a master(main) volume control. It
has better electronics,higher
SIN ratioandismorelinearthan
anysourceunitvolumeavailable. Ifenginenoiseisaudible,try
raisingthevolumeonthesourceunit,and/orchecktheground
connectionontheunit.
MECHANICAL INSTALLATiON
1. Select the desired locationto mount unit underthe dash
board.
2. Drill (4) 4.2 mm diameter holes. Fixthe mounting bracket
underdashor humpwith
(4) 4 x 15 mmtapping screw. Be
carefulwhen drillingso as notto damage existing
wiringunderthe dash board.
3. Mount unitto the mounting bracketwith (4) 3 x 6 mm
machinescrew.
SCREW
~.O'SPRM WASCSR

SPECIFICATIONS:
SUBWOOFER FREQUENCY RANGE: 30 - 160HZ
SUBWOOFER SIGNAL OUT: 10VOLTS RMSl14V PEAK
RMS OUTPUT FRONTIREAR10V RMSI14V PEAK
OPERATION VOLTAGE: 11-16V NEGATIVE GROUND
THD +N: 0.0021%
SIN RATIO: 110dB REF 1V INPUT
FREQUENCYRESPONSE: 15 HZ - 55K HZ, +I- 1dB
STEREO SEPERATION:92 dB1100Hz - 1 KHz
OUTPUT IMPEDANCE:470 Ohms
BOOST/CUT: 18dB
INPUTIMPEDANCE:470k Ohms
INPUTSENSITIVITY:ADJUSTABLE 50mv - 5V RMS
HEADROOM:20 dB
OPERATION
1.When the LINE cassette or CD player connected to this
unit isturned ON, the unitturns ON and the indicator
lights up.
2. Withthe 4 speaker system, usethe fader controlto adjust
thesound balance betweenthefront and rear speakers.
3. Rotatethe graphic equalizer controls to obtainthe preferred
sound quality.
4. Usethe subwoofer output level control onthefront to adjust
the sound level heardfrom the subwoofer.
SOUNDSTREAM TECHNOLOGIES
WWW.SOUNDSTREAM.COM