Formula Sound SHADOW User Manual

SHADOW

1RU STEREO MIXER

USERS MANUAL

2

SHADOW

Introduction

The SHADOW is a 4 stereo + 1 mono (MIC) channel mixer with headphone monitoring and a

crossfader in a 19” 1RU package. Two of the stereo inputs can be set as phono (RIAA) or line

inputs and the other two stereo inputs are line inputs.
Each stereo input has a volume control and is routed to the main output unless the XFADE

switch is pressed when two stereo channels are assigned to each side of the crossfader.
Each stereo channel has a cue select switch for headphone monitoring, an internal setting

allows split monitoring so that the output is on one side of the headphones and any inputs
selected are on the other side (factory setting is monitoring stero inputs on both sides).

The mono (MIC) channel has a mute button and a 2 band EQ that is preset through the rear
panel. All inputs have gain trims that are set through the rear panel.

Each input and output is connected to a relay, when the unit is switched off the relays route
each input/output to a second input/output connector allowing the SHADOW to be completely
bypassed when switched off. This enables the SHADOW to be used as an emergency or
standby mixer, automatically re-routing the signals to itself when the SHADOW is switched on.

Settings

Changing settings require access to the inside of the equipment, this should only be done by
audio professionals who have experience of changing internal settings of audio equipment.

Either or both channels 2 & 3 can be set for LINE or PHONO (RIAA) input, factory setting is for
PHONO (RIAA) on both channels 2 and 3.

The headphone monitoring can be set for either any cue selected inputs in both sides of the
headphones or for cue selected inputs in one side and the master output in the other side ( a
split setting), the factory setting is with any cue selected inputs in both sides of the headphones.

To change either of these settings, with the unit switched off and disconnected from the mains,
remove the cover by undoing the upper screws at either side of the top cover and the two
screws through the top of the cover.

Remove the cover and referring to drawing 781 (towards the end of the manual) move the
jumpers indicated to achieve the required setting.

Refit the cover, ensuring screws are left inside the unit and no wires are trapped during refitting
of the cover.

Installation

Factory set channels 2 and 3 are phono (RIAA) inputs, to set either or both to line level inputs
refer to the settings section above in the manual.

Connect inputs (sources such as mic,CD,record etc) to the connectors marked “IN” on the input
section shown in fig 1 and fig 2 on the next page.

In the output section the connectors marked “OUT” provide the drive to amplifiers.

3

If the SHADOW is to be used for emergency/standby applications the inputs all have adjacent

connectors marked “OUT”, when the mixer is switched off the input is routed to its adjacent

output connector and can then be connected to a master mixer input.
Similarly the outputs have adjacent connectors marked “IN”, when the mixer is switched off the

output is routed to its adjacent input connector and can then be connected to a master mixer
output.

While the SHADOW is switched off the inputs are routed in and out of the SHADOW to the
master mixer, similarly the master mixer output is routed in and out of the SHADOW to the
amplifiers.

When the SHADOW is switched on the master mixer is bypassed and the SHADOW instantly
takes over.

----- Output section ---- ------------------- Input section -------------------

Fig 1

Fig 2
The location of gain trims for each input and the microphone two band EQ on the back panel
can be seen on fig 1 above.

4

Operation

Fig 3

With the inputs and output connected as required switch on the SHADOW and set the front
panel volume controls fully anti-clockwise and set all switches to off.

Set the MIC switch to on and set the MIC and master volume to three quarter position, speak
into the microphone and adjust the rear panel mic gain trim for the required level. Adjust the
rear panel mic EQ for the required sound (this is subjective). Switch the MIC off.

Set the channel 1 volume control to three quarters position and play music into channel 1,
adjust the rear panel gain trim for the required level. Set the channel 1 volume control fully anti­clockwise when finished.

Repeat for channels 2 – 4.
Play music into all 4 channels, all volume controls to be fully anticlockwise, connect

headphones and set the headphone volume control to mid position. Select and deselect cue on
channels 1 – 4 in turn and check the music from the selected channel is present in the
headphones (if the headphones are set for split operation one side will be silent). If split
operation has been select cue on channel 1 and check channel 1 music is present on one side
of the headphones, increase the volume of channel 2 and check the music from channel 2
appears on the other side of the headphones.

Set all volume controls anticlockwise, select the XFADE, with the crossfader to the left increase
the volume of channel 1 and check it appears at the output, now set the channel 1 volume
control fully anti clockwise. Increase the volume of channel 2 and check it appears at the output,
now set the channel 2 volume control fully anticlockwise.

Increase the volume of channels 3 and 4 and check no music appears at the output.
Set all volume controls anticlockwise, select the XFADE, with the crossfader to the right

increase the volume of channel 3 and check it appears at the output, now set the channel 3
volume control fully anti clockwise. Increase the volume of channel 4 and check it appears at
the output, now set the channel 4 volume control fully anticlockwise.

Increase the volume of channels 1 and 2 and check no music appears at the output.
All functionality has now been checked.
www.formula-sound.co.uk
Formula Sound Limited

Unit 23; Stadium Business Centre
North End Road
Wembley
HA9 0AT

Tel: [phone] Fax: [phone] email: [e-mail]

5

TECHNICAL SPECIFICATION

All inputs and outputs are paired with a second set of connectors, when the SHADOW is
switched off these connectors are connected together by a relay. Once the SHADOW is
switched on the second set of connectors are disconnected and the SHADOW is active.

Main output on XLR connectors (EQ set flat)

Distortion THD @ 1 KHz +10dBV <0.005%
Output impedance (Balanced) <100R
Max O/P (Into 600R) +25dBV
20Hz – 20KHz +/- 0.5dB

Microphone input on XLR connector

Gain maximum 70dB
Noise ref 150R EIN<-125dB
Input impedance >2K ohm

Mic EQ (via presets on the rear panel)
Treble +/- 10dB @10KHz
Bass +/- 10dB @120Hz

Stereo inputs 1 – 4 on gold plated phono sockets

Gain max +20dB
Noise EIN < -90dBV
Max input level +20dBV
Input impedance
Line 10KOhms
RIAA If selected on channels 3 and/or 4 47KOhms

Headphones

On ¼” 3 pole jack socket, use no less than 32 Ohms headphones

Power

220-240V AC standard (115V to order. Or consult user manual to change)
Mains fuse 220-240v operation 250mA slow blow
Mains fuse 110-115v operation 500mA slow blow
I.E.C. Mains connector

Finish

Front and Rear panels Bordeaux anodised aluminium with silver notation
Case black plastic coated steel

Dimensions

19" rack mounting. 1RU Width 482mm (19") Depth 200mm (7.9") Height 44mm (1.75")
Formula Sound reserve the right to alter the specification without notice.

6

L74

R15

EC6

VRF1

SW1

R11

DC19

VRDF1

R12

R16

R14

PC - 300

SOUND

FORMULA

T1

R5

R4

DC2

T2

R3

R6

R7

R1

EC1

C1

P2

P1

R2

EC2

U1

P5

DC1

R9

P3

R8

P4

EC5

C8

EC4

R13

R19

R10

C7

RL2

R

HF

D3FGH

1

X1

EC3

3

2

VRS1

D3MGH

X2

2

PR1

1

3

R66

R65

R64

R52

VRDF2

SW2

C9

R17

R18

R49

R50

R51

SW3

R53

L

R

R54

R55

R56

R63

R68

R59

R60

R62

R61

S1

SW4

R57

R58

L

EC22

P11

EC19

EC11

LINE INPUT

U7

C3

R22

JUMPER POSITIONS

CHAN 3 & 4

PHONO INPUT

P7

DC3

U2

DC4

R21

R20

P6

EC7

EC18

EC25

EC24

C5

R28

R27

R26

R25

R24

C2

C4

EC10

P10

EC8

R23

L

U4

DC8

H1

DC7

H2

CHAN 3

R L

PH SKT X4

RL3

VRDS1

LF

PR2

VRDS2

PS1

D8

H3

R67

DC11

DC12

R

EC26

L

R47

EC27

U6

R

R48

EC23

EC20

R35

R36

R38

R39

C15

C16

C17

R37

R34

R32

R33

R30

C10

C11

R31

R29

C6

EC9

R40

EC12

EC14

R

P12

EC21

R

H4

DC9

DC10

U5

CHAN 4

L

P13

EC15

R43

C12

C13

R46

R45

R44

R42

EC16

C14

R41

EC13

R

RL4

PH SKT X4

VRDS3

PS2

1

PH SKT X4

RL5

VRDS4

PS3

R103

PFL

SELECT PFL

R69

R70

R

R71

R72

VRDF3

SW5

ONLY

R105

R106

EC32

VRDF4

OUTPUT

L70

PFL

R100

R107

R99

VRDF5

SW6

DC20

EC33

R108

DC18

EC34

SELECT PFL JUMPER POSITIONS

EC29

3

D3FGH

R77

7818

EC40

EC41

DC5

MVR1

C19

P9

U3

DC6

C18

R73

P8

L

MVR2

7918

EC42

+

-

DC14

R74

EC17

R80

R81

R82

P14

R79

R78

PH SKT X4

RL6

PS4

1

EC28

R89

+

-

SPLIT

RL7

R84

R83

R85

U8

DC13

P15

R86

DC16

R90

P17

R96

R97

YEL

RED

R101

CK1CK2

GREEN

D1

H5

D2

D3

D4

R98

R91

R92
R93

EC43

R94

R95

U9

MAINS

EARTH

DC15

P16

OVE

TO

EC30

D3MGH

2

R75

R76

X3

L8 L9

2

3

X4

1

EC31

R87

R88

X5

D7

1

3

D3FGH

E

E

R110

R125

R112

D10

VRDF6

2

R109

P19

EC36

R104

EC39

U10

D9

D6

TO JACK SOCKET

EC37

EC38

TCW LINKS

R114

C

B

T8

R113

E

E

B

T7

C

C

B

T6

R115

P20

R116

R117

R118

R119

R120

P21

MAINS EARTH

R111

R102

P18

T3

DC17

T4

R123

EC35

DC21

D5

TXM1

LIFT

T5

C

B

R124

22

RL1

1

H6

3

X6

D3MGH

EC44

R121

R122

1. Channel 2 and 3 LINE or PHONO (RIAA) setting.

2. Headphone monitoring, input only or split input and output.

Move jumpers as silk screen legend on PCB indicates for required settings

7

FORMULA SOUND LIMITED

UNIT 23; STADIUM BUSINESS CENTRE; NORTH END ROAD; WEMBLEY; MIDDLESEX; HA9 0AT

TELEPHONE [phone] FAX [phone]

www.formula-sound.co.uk email [e-mail]

E.U. CERTIFICATE OF CONFORMITY

We declare that the products listed conform to the following directives and standards

89/336/EEC amended by 92/31/EEC and 93/68/EEC

BS EN 50082-1 BS EN 50081-1

PRODUCT TYPE

SHADOW

The CE mark was first applied in 1995

Signed

B. J. Penaligon General Manager

Attention

The attention of the specifier, purchaser, installer, or user is drawn to the fact that good wiring practice must be
observed when connecting the above equipment. Good quality connectors and screened cables must be used for all
audio connections. Twin screened cables should be used for all balanced lines.

THIS EQUIPMENT MUST BE EARTHED

CONSULT THE USERS MANUAL FOR TECHNICAL DETAILS