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INTRODUCTION
Thank
\ou
very much for purchasing a Fostex Model 812
Recording Mixer.
The Mode B12 is a '2-inpul 'eoording mixer with al the
necessary functions required fo a multilracK recording. Tiie
Model G12 has all of the foltowing features
1
An 8 channel output, orcvicina the pcrlcct combination
wifi an 8-track multitrack recorder.
2 Two Effect Sends (monaural) and ar
Auxilary Send
(stereo), al owing a variety of sound effect processes
possible
3. The capability to send the AUX signal (while monitoring
the recorder output signal) to the Effect Send 2 output,
making it possibe to, tor example, cas a reverceraton
or this signal and thus slmuiaie the recording environ¬
ment wiliout tampering with lire output sigials to the
recorder
4. Two paranetic and cne shelwng ec utilizers, giving more
flexibility to tone control, and, with the use of a solo moni¬
tor 'unction and .mute furction. the mixing process is
made even more easy.
5. Three stereo Effect Returns alowing connections
vari¬
ous
sound
effect processors
without
sacrificing
irput
channels lo eccept the output signals from the piocessors
6. A DC24V phaniom power source, enabling -lookup to e
high quality condenser microphone
7. An FL level merer.
8. Space fer connectng MID! interfacing :or future use with
MIDI control.
We hepe that you tnoroughiy -ead this Manjal and wil
utilize (he product to its fullest capabilues. With proper use
and maintenance, you wil enjey maiy years ol satisliec
periornance.
TABLE OF CONTENTS
■ M IWhh.
SECTION 1
V
■
W W I 1 I lall
|
SPECIFICATIONS
PAGE
2
SECTION 8
M JUITRACK RECORDING
PAGE
12
SECTION 2
BLOCK DIAGRAMS
3
SAMPLE CONFIGURATIONS
12
SECTION 3
GUIDE TO COMPONENTS
5
BASIC TRACK RECORDING
12
SECTION 4
THE PARAMETRIC EQUALIZER
9
OVER-CUBBING
14
SECTION 5
CONNECTING FFFFCTORS
9
PING-PONG RECORDING
15
SECTION 6
CONNECTING PERPHERAL
10
M XING-DOWN
16
SECTION 7
EQUIPMENT
BASIC SIGNAL FLOW
11
SECTION 9
TROUB_E-SHOOTING
19
section i
SPECIFICATIONS
INrUT
(A
12)
AUX OUTPUT |L/R) <> 1)
Mlcrophonn Impedancr
WOE
or
less
Output lead impedance
lOkO cr mere
Input Imoe dance
?M) balanced X.R connector
Nominal output leva
-IOcBV (0.3'/)
ana 20hQ unDnOnecrl pl-varc
HCk
Maximum output level
MONITOR OUTPUT (LR)
|x1)
Output load impedance
•ilOdSV iSGY)
Ncmnal Input level
Microp*>one
603 BV [imV.
lOkO Jr mere
Line:
lOdDV (-5.3VI
Nominal output lev©
-1000V 103'/)
Minimum Input level
70JBV (OlnW)
Maximum output level
-iSdBV S6V)
Maximum input level
Hbdt5V(5CV}
HEADPHONES OUTPUT (Stereo)
TAPE INPUT (- 12)
Output load Imparlance
8-5CU
Input impedance
Mkt!
Maximum output
BCmVY
Nominal Input level
-IUCIUV(OSV)
DIRECT OUTPUT
(X
12)
Minimum Input level
2COBV (O.'V)
Output load Impsdanco
lOkll
V nao
Maximum input level
t-l5dBV(5.6V)
Nominal output leva
-IOoBV (03 V)
INSERT INPUT (X12)
Maximum output level
-tStlBV i.sev)
Input impedance
JOktl
FREQUENCY RESPONSE
Nominal input level
- lOdBV (05V)
Mcrophone input
20 - 20kH2 .1/-20B
INSERT OUTPUT (X12)
Line input
20-?0kHz -.V-1CI0
Output load impedance
'Old? or moia
Monitor rxilput
30-20kH7 il/—3dR
Nominal output level
- 10QBV (Q3V)
Headphones output
20 - 20kHz .1/-20B
Maximum output level
► I30BV (0.0/)
EQUIVALENT INPUT NOISE
—12SQBV w&gnteo
BUSS INPUT iGROUPxB, EFFECT *2, AUX (Lfl)xl)
OVERALL SIGNAL TO NOISF
Input impotbnce
20 kl)
1
mlc input
6£el8 weghlcd
Nominal InpJt level
- IOUBV (03V)
(2
mlc Input
wegrweo
EFFECT RETURN (UR) (<3)
T.H.D.
0.115% (UHz. nominal ln«=l)
Input impedance
7kQ
0.1% (heaGphunis 1kHz
Nominal Input level
lOJOV (O.CV|
lOnMWXW)
Maximum input level
+2SdBV (173V)
FADER ATTENUATION
7Cd3 (1kHz)
GROUP OUTPUT
(x
6)
CROSSTALK
6£d8 (1kHz)
Output lood Impcflcncc
OHO or mere
PARAMETRIC EQUALIZER
00- HI? ti3d0
Nomnal output level
- 10.1BV (03V)
400-6kHz *I5cB
Maximum output level
»15dBV (5.6V)
10kH: *i5d8 (SHEIVIM3)
EFFECT SEND (x2)
POWER REQUIREMENTS
100V 42W
Cut put load impedance
•QkQ
cr
more
120V 4EW
Nomnal output level
WdBV (03V)
220V 4£W
Maximum output lovcl
* tSoBV (&.6V)
DIMENSIONS (HxWxD)
2'0V 4EW
175 mm x $70rm x 530mm
WEIGHT
1*9129 lt«S)
PHANTOM POWER SLPPLV
DC34V
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