Alto OEX-400S Users Manual

USER'S MANUAL

DSP

- --

- --

-

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MP3PLAYER

00

03:08

OEX-400S

STEREO FULL-RANGE COMPACT PORTABLE SOUND SYSTEM
WITH 24-BITS DIGITAL EFFECTS

HA TOM
(H1 4)

OEX-400s

EQ EQ EQQEQ

RS TS

DS/FDS/XD P

SPFXD P

/X

M M(E E E E E

/X

PAN PA BLANP N

2 Bt i t l f t

EVL

MAS ER

LVEL EVL EELLEELEEL

345/621

L

R

CD/TAPE

PKOUT

NO. 1, Lane 17, Sec. 2, Han Shi West Road, Taichung 40151, Taiwan

SEIKAKU TECHNICAL GROUP LIMITED

http://www.altoproaudio.com Tel: [phone]

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

All rights reserved to AL TO . All features and content might be changed

without prior notice. Any photocopy, translation, or reproduction of part of this

manual without written permission is forbidden. Copyright 2009 Seikaku Group

c

www.altoproaudio.com

Version 1.2 DEC. 2010

English

NF03374-1.2

9. WARRANTY

1. WARRANTY REGISTRA TION CARD

To obtain Warranty Service, the buyer should first fill out and return the enclosed
Warranty Registration Card within 10 days of the P urchase Date.
All the information presented in this Warranty Registration Card gives the
manufacturer a better understanding of the sales status, so as to provide a
more effective and efficient after-sales warranty service. Please fill out all the
information carefully and genuinely, miswriting or absence of this card will void
your warranty service.

2. RETURN NOTICE

2.1 In case of return for any warranty service, please mak e sure that the product
is well packed in its original shipping carton, and it can protect your unit from
any other extra damage.

2.2 Please provide a copy of your sales receipt or other proof of purchase with
the returned machine, and give detail information about your return address
and contact telephone number.

2.3 A brief description of the defect will be appreciated.

2.4 Please prepay all the costs involved in the return shipping, handling and
insurance.

3. TERMS AND CONDITIONS

3.1 LTO warrants that this product will be free from any defects in materials
and/or workmanship for a period of 1 year from the purchase date if you
have completed the Warranty Registration Card in time.

3.2 The warranty service is only available to the original consumer, who purchased
this product directly from the retail dealer , and it can not be transferred.

3.3 During the warranty service, L TO may repair or replace this product at its
own option at no charge to you for parts or for labor in accordance with the
right side of this limited warranty.

3.4 This warranty does not apply to the damages to this product that occurred
as the following conditions:

Instead of operating in accordance with the user's manual thoroughly, any abuse
or misuse of this product.
Normal tear and wear.
The product has been altered or modified in any way.

Damage which may have been caused either directly or indirectly by another

product / force / etc.
Abnormal service or repairing by anyone other than the qualified personnel or
technician.

And in such cases, all the expenses will be charged to the buyer .

3.5 In no event shall L TO be liable for any incidental or consequential damages.
Some states do not allow the exclusion or limitation of incidental or
consequential damages, so the above exclusion or limitation may not apply to
you.

3.6 This warranty gives you the specific rights, and these rights are compatible
with the state laws, you may also have other statutory rights that may vary
from state to state.

20

8. TECHNICAL SPECIFICATION

IMPORTANT SAFETY INSTRUCTION

FAT analysis

MP3 DECODE

Electric Specification

Power Section (SPK.OUT)

Distortion

Frequency Response
SNR (Line IN)
Output level
Power continuous 1KHz,THD 1%

Power EIAJ 1KHz,THD 1%

Thermal protection

Short protection

Voltage protection

Speaker Section

Passive System Type
Continuous Power
Peak Power
Max SPL at 1M
Frequency Response
Impedance
Crossover Frequency
Protection
Coaxial Type Low Frequency Driver
High Frequency Driver
Coverage HxV
Connectors

Statis Power Consumption

No Output powerstate at 230V

Dielectric Strength

Between Live+Negative Earth

Between Live+Negative IN/OUT
Terminal(Positive+Negative)

Insulation Resistance

Between Live+Negative
Earth(A Voltage of 500VDC)
Between Live+Negative
IN/OUT Terminal(Positive+Negative)
(A Voltage of 500VDC)

Power supply

Main voltage

Physical

Dimension (W D H)
Net Weight
Cross Weight

Supports FAT 16 and FAT 32, Supports VFAT (long file
name), Supports multi partion up to 1
Supports sample rates 8KHz, 32KHz, 11.025KHz,

22.05KHz, 44.1KHz, 12KHz, 24KHz, and 48KHz.
Supports bit rate 8 to 320 kbps and VBR (Variable Bi
Rate) except free format
Frequency Response 20Hz~20KHz
Output level 0 dB
S/N Ratio > 90 dB
Distortion (at 1 KHz) <0.05%

<0.1% (at 1W & 1 KHz)
<0.15% (at 100W & 1 KHz)
20Hz to 22kHz, +/ 2dBu (at 100W)

100 dBu

30.5dBu +/ 1dBu (+10 Led Light & COMP.Start)
2X200W@4
2X110W@8
2X250W@4
2X130W@8
over temperature power limiting
thermal shutdown
Temperature controlled 12V DC fan output
short circuit protection
overload output protection
over voltage protection
DC offset shutdown

2 way Coax vented box
150W AES standard (each speaker)
300W Peak (each speaker)

117.5dB SPL calculated
65Hz 20KHz at 10dB
8 nominal

2.3KHz/12dB/Oct
Electronic on the Driver
10 Woofer / 2 Voice Coil
1 Neodymium Driver / 1 Voice Coil
70 Hx70 V Spherical hom
Power Input with mono Jack

32W

1500VAC at Test,Frequency 50/60Hz,Leakage
Current:5mA for 1minute
3000VAC at Test,Frequency 50/60Hz,Leakage
Current:5mA for 1minute

2M

4M

100 120VAC~60Hz
220 240VAC~50Hz
100~120V: T10A 250V
220~240V: T5A 250V

984mm*440mm*460mm (38.7 x17.3 x18.1 )

19.61kg

25.41kg

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

TO REDUCE THE RISK OF ELECTRIC SHOCK
PLEASE DO NOT REMOVE THE COVER OR
THE BACK P ANEL OF THIS EQUIPMENT .
THERE ARE NO PARTS NEEDED BY USER
INSIDE THE EQUIPMENT. FOR SERVICE,
PLEASE CONTACT QUALIFIED SERVICE
CENTERS.

This symbol, wherever used, alerts you to the

presence of un insulated and dangerous voltages
within the product enclosure. These are voltages that
may be sufficient to constitute the risk of electric
shock or death.

This symbol, wherever used, alerts you to

important operating and maintenance instructions.

Please read.

Protective Ground Terminal
AC mains (Alternating Current)

Hazardous Live Terminal
ON: Denotes the product is turned on.
OFF: Denotes the product is turned off .

CAUTION

Describes precautions that should be observed to
prevent damage to the product.

1.

Read this Manual carefully before operation.
Keep this Manual in a safe place.

2.

Be aware of all warnings reported

3.

with this symbol.

4.

Keep this Equipment away from water and
moisture.

5.

Clean it only with dry cloth. Do not use
solvent or other chemicals.

6.

Do not damp or cover any cooling opening.
Install the equipment only in accordance with
the Manufacturer's instructions.

Power Cords are designed for your safety. Do

7.

not remove Ground connections! If the plug
does not fit your AC outlet, seek advice from
a qualified electrician. Protect the power
cord and plug from any physical stress to
avoid risk of electric shock. Do not place
heavy objects on the power cord. This could
cause electric shock or fire.

Unplug this equipment when unused for long

8.

periods of time or during a storm.

Refer all service to qualified service personnel

9.

only.Donotperformanyservicingotherthan
those instructions contained within the
User's Manual.

To prevent fire and damage to the product,

10.

use only the recommended fuse type as
indicated in this manual. Do not short circuit
the fuse holder. Before replacing the fuse,
make sure that the product is OFF and
disconnected from the AC outlet.

WARNING

T o reduce the risk of electric shock
and fire, do not expose this equipment
to moisture or rain.

Dispose of this product should
notbeplacedinmunicipalwaste
and should be separate collection.

Move this Equipment only with a cart,

11.

stand, tripod, or bracket,
specified by the
manufacturer, or
soldwiththe
Equipment. When
a cart is used, use
caution when
moving the cart /
equipment
combination to
avoid possible
injury from tip over.

12.

Permanent hearing loss may be caused by
exposure to \ extremely high noise levels.
The US. Government's Occupational Safety
and Health Administration (OSHA) has
specified the permissible exposure to noise
level.
These are shown in the following chart:

HOURS X DAY SPL EXAMPLE

Small gig

8
6
4
3
2
1,5
1
0,5
0,25 or less

According to OSHA, an exposure to high SPL in
excess of these limits may result in the loss of
heat. To avoid the potential damage of heat, it is
recommended that P ersonnel exposed to
equipment capable of generating high SPL use
hearing protection while such equipment is
under operation.

The apparatus shall be connected to a mains
socket outlet with a protective earthing
connection.

The mains plug or an appliance coupler is used
as the disconnect device, the disconnect device
shall remain readily operable.

90

train

92

Subway train

95

High level desktop monitors

97

Classic music concert

100
102
105
110
115

Rock concert

19

IN THIS MANUAL

8. TECHNICAL SPECIFICATION

1. INTRODUCTION................................................................................1

2. FEATURES.......................................................................................2

3. QUICK START..................................................................................2

4. CONTROL ELEMENTS......................................................................3

5. INSTALLATION & CONNECTION......................................................14

6. BLOCK DIAGRAM...........................................................................16

7. PRESET LIST..................................................................................17

8. TECHNICAL SPECIFICA TIONS..........................................................18

9. WARRANTY ..................................................................................20

1. INTRODUCTION

Congratulations! Now you are the owner of the OEX-400S. The OEX-400S is a
plastic reinforced trolley that includes a versatile mixer with DSP effects, L&R
full range speaker cabinets. Besides, this package also includes some essential
accessories such as power cord, signal cables, speaker cables. In order to
ensure high versatility and excellent audio performances, the OEX-400S adopts
optimal crossover frequency and advanced power amplifier technologies.

The L&R speaker cabinets are tightly hooked on the trolley. When you operate
the OEX-400S, first of all take care of the setting of the L&R cabinets . It is
the development of ALTO's experience and knowledge in speakers field, in order
to faithfully reproduce sound for each kind of applications.

Inlaid in OEX-400S panel there's a compact extractable 8-channel mixer, which
adopts 24-bit A/D&D/A converters and 24-bit DSP effects with accurate
algorithms (16 presets). It also provides 4 MIC inputs with ultra low noise
microphone pre-amplifiers, natural 2-band EQ; AUX send/return and 2TK in/out
and optional MP3 and 9 band EQ and so on.

In a word, it is ideally suited for live sound applications, small venues
applications, live recording and many other musical purposes. In order to get
the best performances from your OEX-400S, we recommend you to thorou­ghly read this owner's manual before installation and operation.

1 18

Mono channels(CH1-CH4)

Microphone Input

Frequency Response:
Distortion( THD&N)
Sensitivity
Maximum Voltage Gain

SNR( Signal to Noise Rate )
Phantom power
Line Input
Frequency Response:
Distortion( THD&N)
Sensitivity
Maximum Voltage Gain

Stereo channels(CH5/6)

Line Input
SNR( Signal to Noise Rate )
Frequency Response:
Distortion( THD&N)
Sensitivity
Maximum Voltage Gain

Impedance

Microphone Input
All Other Input
Tape Out
All Other Outputs

Equalization

High( )Mono channels
High(Stereo channels)
Low(Mono channels)
Low(Stereo channels)

DSP Section

A/D And D/A Converters
DSP Resolution
Type of effects

Presets
Controls

Crosstalk

Adjacent Input
Input to Output

Main Mix Section

TRACK,Aux,Phones Output

Master Output(to AMP)
Main EQ(Option)
Noise (Bus noise)

Compressor

Threshold
Ratio

Mp3 Section(Option)

USB HOST

Electronically Balanced, discrete Input Configuration(SW
to MIC)
20Hz to 22kHz, +/ 2dBu

0.02% At 1kHz
30 dBu

51 dB CH MIC INPUT HEAD PHONE OUT
51 dB CH MIC INPUT TAPE OUT
51 dB CH MIC INPUT FX SEND

100 dBu
+45V~+49V with switch control (Mic Pin2/Pin3 And Pin1)
Electronically Balanced(SW to LINE)
20Hz to 22kHz, +/2dBu

0.02% At 1kHz
0dBu
21 dB CH LINE INPUT TAPE OUT

Electronically Balanced(SW to LINE)

100 dBu
20Hz to 22kHz, +/ 2dBu

0.02% At 1kHz
0dBu
20 dB FX RETURN TAPE OUT
20 dB RCA TAPE INPUT TAPE OUT

3.9k Ohms
10k Ohms or Greater
1k Ohms
120 Ohms

15 dB @12 kHz
15 dB @12 kHz
15 dB @80 Hz
15 dB @80 Hz

24 Bit
24 Bit
WARM HALL, BRIGHT HALL, WARM ROOM, BRIGHT
ROOM, VOCAL1, VOCAL2, VOCAL3, PLATE, STEREO
DELAY1, STEREO DELAY2, REV+DELAY1, REV+DELAY2,
REV+DELAY3,REV+DEALY4,REV+CHORUS1,REV+
CHORUS2
16
16 Posistion PRESET Selector
CLIP LED
MUTE SWITCH with LED Indicator

75 dB @ 1KHz (CH1 6)
70 dB @ 1KHz (STEREO L/R,CH1 4,PAN:panned hard

left or right)

Output level 0dBu Unbalanced, 1/4" Jacks
Max out +22dBu Unbalanced, 1/4" Jacks
Output level 5dBu (CN10,CN11)
+/ 12dB @ 9 bands(63,125,250,500,1K,2K,4K,8K,16KHz)

78dB @ 20Hz~22KHz (channel & MAIN level at 0dB,

other at minimum,DSP mute)

7dBu
6:1

"Builds in the USB FULL speed(12Mbps)HOST
control function"
Supports the USB mass storage class

7. PRESET LIST

NO. Preset Description

1

WARM HALL

BRIGHT HALL

2

WARM ROOM

3

BRIGHT ROOM

4

VOCAL 1

5

VOCAL 2

6

VOCAL 3

7

PLATE

8

STEREO DELAY 1

9

STEREO DELAY 2

10

REV+DELAY 1

11

REV+DELAY 2

12

REV+DELAY 3

13

REV+DELAY 4

14

REV+CHORUS 1

15

REV+CHORUS 2

16

Simulate a small acoustic space of the sound.

Simulate a large acoustic space of the sound.

Simulate a small acoustic space of the sound.

Simulate a studio room with many early reflections.

Simulate a room with without delay time.

Simulate a room with small delay time.

Simulate a small space with slight decay time.

Simulate the transducers sound like classic bright
vocal plate.

Recreate the input sound on the stereo output
with different time.

Recreate the input sound on the stereo output
with different time.

Delay with room effect.

Delay with room effect.

Delay with room effect.

Delay with room effect.

Simulate the sound effect achieved by rotating
horn speakers and a bass cylinder.

Simulate the sound effect achieved by rotating
horn speakers and a bass cylinder.

Parameter

Rev. Decay time: 360ms
Pre delay: 45ms

Rev. decay time: 290ms
Pre delay: 23ms

Rev. decay time: 210ms
Pre delay: 45ms

Rev. Decay time: 210ms
Pre delay: 23ms

Rev. decay time: 450ms

Rev. decay time:240ms
Pre delay: 25ms

Rev. decay time:100ms
Pre delay: 114ms

Pre delay: 10ms
Rev. decay time: 290ms

Period: 352ms

Period: 238ms

Delay period: 326ms
Rev. decay time: 290ms

Delay period: 211ms
Rev. decay time: 240ms

Delay period: 375ms
Rev. decay time: 210ms

Delay period: 277ms
Rev. decay time: 150ms

Chorus rate: 3.67Hz
Rev. decay time: 290ms

Chorus rate: 3.02Hz
Rev. decay time: 150ms

2. FEATURES

Lightweight, Luggage style, Trolley appearance portable system
Two 10" speakers + 8-channel powered mixer in super combination
Stereo full-range speaker system
4 XLR MIC input with ultra low noise microphone pre-amplifiers
+48V Phantom power
1 stereo LINE input & 1 stereo CD/TAPE input
Warm, natural 2-band EQ , PAN(BAL) for each channel
Precision level control
24-bit DSP effects with powerful algorithms (16 presets)
MP3 player & 9-Band EQ for option
2 speaker cables&2microphone and cables
Amp. System with 250W *2 @ 4ohm in EIAJ; 200W*2@4ohm in RMS

3. QUICK START

This is the fastest way to get something out from your OEX-400S, if you have
a keyboard and a microphone.

a. Please check the AC voltage available in your country before connecting your

OEX-400S to the AC socket.

b. Be sure that the main power switch is turned off before connecting the

powered mixer to the AC socket. Also, you should make sure that all input
and output controls are turned down. This will avoid damages to your
speakers as well as excessive noise.

c. Please connect a passive speaker to your OEX-400S speaker connector or

1/4'' jack(#35). Otherwise, you can connect a pair of active speakers directly

to your OEX-400S Main Out Left & Right 1/4'' jacks(#18).
d. Complete these connections as illustrated.
e. Before disconnecting the OEX-400S always turn-off the Power switch.
f. Do not use solvents to clean your OEX-400S. A dry and clean cloth will be OK.

Here you are. It is your first GIG with your .OEX-400S

17 2

DSP

- - ---

- - ---

-

-

MP3 PLAYER

00

03:08

SPOTLIGHT

DAT

GIG HOOKUP DIAGRAM

USB key

MP3 USB REP

PHANTOM

(CH1 4)

OFF ON

8

RIGHT

LEFT

8

MIC MIC MIC MIC

LINE LINE LINE LINE LINE

N

O

W

I

S

O

E

L

P

OEX-400s

EQ EQ EQEQEQ

HI HI HIHIHI

15 +15 -15 +15 -15 +1515 +15-15 +15

LOW LOW LOWLOWLOW

15 +15 -15 +15 -15 +1515 +15-15 +15

DSP

DSP

DSP

/FX

/FX

8

LEFT

8

W

O

L

R

E

A

M

P

MIC/LINEMIC LINE

RIGHT

N

O

I

S

E

P

LEFT

L

R

E

M
P

MIC LINE MIC/LINE

+10 +10 +10+10+10

8

RIGHT

+10 +10 +10+10+10

8

LEVEL LEVEL LEVELLEVELLEVEL

N

O

W

I

S

O

3

DSP

/FX

/FX

POST POST POSTPOSTPOST

8

PAN PAN BALPANPAN

RIGHT

LEFT

LEFT

8

(MP3)

N

O

W

I

S

O

E

E

L

P

P

R

R

E

E

M

M

P

P

4

8

8

LEFT(MONO)

RIGHT

5/621

WARMHALL

REV+CHORUS2

REV+CHORUS1

REV+DELAY4

REV+DELAY3

REV+DELAY2

REV+DELAY1

STEREO+DELAY2

STEREO+DELAY1

DSP
/FX

RIGHT

PRESETS

24 Bit digital e fects

10

0+10

FXRET LEVEL

LIN

FXRETURNS

FXSEND

CD/TAPE

6. BLOCK DIAGRAM

BRIGHTHALL

WARMROOM

BRIGHTROOM

VOCAL1

VOCAL2

VOCAL3

PLATE

POWERPEAK

+10

8

LEVEL

MASTER

PHONES

L

(MIN LOAD 4 Ohms)

R

SPK.OUT

OUTPUT

LEVEL

+10

0

10

30

LR

HEADPHONE

SPEAKER

MUTE

8

OUT

MIC1

MIC2

WIRELESS

MICROPHONE

BASS

DIGITAL EFFECT UNIT

KEYBOARD

DAT OR TAPE RECORDER

3 16

5. INSTALLATION AND CONNECTION

DSP

- - ---

- - ---

-

-

Ring Return Signal (Connected together)

To Channel Insert

Sleeve Ground/Screen

Tip Signal

To Tape or FX Input

Sleeve Ground/Screen

'Tapped' Connection Direct Output Lead

(Enables the Insert to be used as a Direct Output

while maintaining the channel signal flow)

To Processor Input

Sleeve Ground/Screen

Tip

Tip Send Signal

SPOTLIGHT

OEX-400S

OPTION

PHANTOM

(CH1 4)

OFF ON

8

RIGHT

LEFT

8

MIC MIC MIC MIC

LINE LINE LINE LINE LINE

N

O

W

S

O

E

L

P

OEX-400s

EQ EQ EQEQEQ

HI HI HIHIHI

15 +15 -15 +15 -15 +15-15 +15-15 +15

LOW LOW LOWLOWLOW

15 +15 -15 +15 -15 +15-15 +15-15 +15

DSP

DSP

DSP

/FX

/FX

8

LEFT

8

W

O

L

R

E

A

M

P

MIC/LINEMIC/LINE

RIGHT

N

O

I

S

E

P

LEFT

L

R

E

A

M

P

MIC/LINE MIC/LINE

+10 +10 +10+10+10

8

RIGHT

+10 +10 +10+10+10

8

LEVEL LEVEL LEVELLEVELLEVEL

N

O

W

I

S

O

3

DSP

/FX

/FX

POST POST POSTPOSTPOST

8

PAN PAN BALPANPAN

RIGHT

LEFT

8

N

O

W

I

S

O

E

E

L

P

P

R

R

E

E

A

M

P

4

WARMHALL

10

STEREO+DELAY1

PRESETS

MUTE

24 B t dig tal effects

8

LRIN

LOUTR

CD/TAPE

BRIGHTHALL

WARMROOM

BRIGHTROOM

VOCAL1

VOCAL2

VOCAL3

PLATE

POWERPEAK

+10

8

LEVEL

MASTER

PHONES

L

(MIN LOAD 4 Ohms)

R

SPK.OUT

OUTPUT

LEVEL

+10

0

-10

-30

LR

REV+CHORUS2

REV+CHORUS1

REV+DELAY4

REV+DELAY3

REV+DELAY2

REV+DELAY1

STEREO+DELAY2

DSP
/FX

8

RIGHT

LEFT

0+10

8

FXRET LEVEL

(MP3)

A

M

P

LEFT(MONO)

FXRETURNS

RIGHT

FXSEND

5/621

To Channel Insert

Ring Return Signal

To Processor Output

MP3 PLAYER

MP3 USB REP

00

63

+12

+8

+4

0

4

EQ OFF

8

EQ ON

12

L

03:08

Option NO.1

500250125

STEREO GRAPHIC EQ

Option NO.2

16K

1K

8K4K

2K

+12

+8

+4

0

4

8

12

USB Connection

Sleeve

Ring

Y Stereo lead for insert Connection

(To be used when the processor does not employ a
single jack connection for the In/Out Connections)

15 4

DP

- - --

- - -- -

SPOTLIGHT

4. CONTROL ELEMENTS

5. INSTALLATION AND CONNECTION

Accessory List:

1 Power cord 1 IEC power cord
2 Customized Speaker Cable 2 7m
3 MIC 2 5m
4 F-8 stands (optional)
5 F-3 stands (optional)
6 F-3 stand adaptor (optional)

1 2

OEX 400s

6

3

Audio Connections

You can connect unbalanced equipment to balanced inputs and outputs. Simply
follow these schematics.

Tip

Strain Clamp

Strain Clamp

Strain Clamp

Sleeve

Ring

Use for Headphone

1/4" Stereo (TRS) Jack Plug

Tip

Sleeve

Sleeve Ground/Screen

Use for Mono Line In, Mono 1/4"Jack Plugs

1/4" Mono (TS) Jack Plug

Tip

Sleeve

Ring

Ring Right Signal

Tip Left Signal

Sleeve Ground/Screen

Tip Signal

Ring Return Signal

Tip Send Signal

Sleeve Ground/Screen

5

Use for Insert Points

1/4" Stereo (TRS) Jack Plug

4 4

2

2 Hot(+)

Use for Balanced Mic Inputs

(For unbalanced use, connect pin 1 to 3)

3

3 Cold(-)

1

1 Ground/Screen

3 pin XLR Male Plug

(seen from soldering side)

2 Hot(+)

(For unbalanced use, leave pin3 unconnected)

2

1

3

3 Cold(-)

Use for Main output

3 pin XLR Line Socket

(seen from soldering side)

1 Ground/Screen

5 14

y

SPOTLIGHT

4. CONTROL ELEMENTS

9 BAND EQ selective mode

63

5002501252K1K

+12

+8

+4

0

-4

EQOFF

-8

EQON

-12

STEREOGRAPHIC EQ

16K

8K4K

+12

+8

+4

0

4

8

-12

CN7

EQ MODULE

CN9

Please connect the 8PIN row-wire on the 9BAND EQ model to the CN9 header
on the main mixer board. Then fix the 9BAND EQ model on the mixer panel with
two screws.

34 POWER ON/OFF

This switch is used to turn the main power on/off.

35 AC SELECT

Before connecting the OEX-400S to the mains supply first check that the
Voltage Selector is showing the correct voltage for your country.

36 AC INLET

This jack is used to connect the unit to
the mains with the enclosed power cord.
(Depends on applicable country regulators)

3534 36

AC INPUTAC SELECTPOWER

ON

OFF

100 120V~60Hz FUSE: T10AL 250V
220 240V~50/60Hz FUSE: T5AL 250V

SPOTLIGHT

4. CONTROL ELEMENTS

1 PHANTOM POWER Switch

This button will apply +48 Volt Phantom
Power only to the 4 XLR MIC input sockets.
When condenser microphones are not used,

PHANTOM

(CH1-4)

OFF ON

please make sure that the Phantom Power
is disengaged.
NOTE: When switch on/off the phantom power,
please firstly turn the level control knob to min.

2 MONO INPUT CHANNELS(CH1 TO CH4)

There is CH1 through CH4, which comes with
balanced MIC IN and LINE IN connectors. Use
the XLR (MIC IN) socket to connect low impe­dance microphone or low level signal. Use the
1/4" TRS (LINE IN) jack to connect either a
microphone or a line level instrument such as
synthesizers, drum machines, effect proces­sors or any other line level signal.
NOTE: Never try to connect a line-level signal
to the XLR MIC input when the phantom power
is engaged or you may seriously damage your
equipment.

3 STEREO INPUT CHANNEL(CH5/6)

These are channels 5/6. They are organised
in stereopair and provided with 1/4" TRS
phone sockets. If you connect only the left
jack, the input will operate in mono mode,
that is the mono signal will appear on both
input channels. You can use these inputs
with a stereo keyboard, drum machine, etc.

1

2

4 MIC / LINE switch

When using XLR socket, please put the switch at the MIC position; When using
1/4'' TRS jack, please put the switch at the LINE position.

1

9

10

8

7

6

4

5

3

5 MP3/LINE switch

Pushing this switch to left will route the signal from MP3 IN to CH5/6 path,
while to right will route the signal from 1/4'' TRS jack.

6 LEVEL CONTROL

This control is used to adjust the overall level of respective Channel. The adjust­able range goes from - to +10dB.

13 6

SPOTLIGHT

4. CONTROL ELEMENTS

SPOTLIGHT

4. CONTROL ELEMENTS

7 PAN/BAL CONTROL

This is the PANORAMA control, or balance control. You can adjust the stereo
image of the signal via this control. Keep this control in center position and
your signal will be positioned in the middle of stage. Turn this control fully
counter clockwise and the signal will be present only on the left speaker and
vice-versa. Of course a large number of intermediate positions is available.

8 DSP/FX control

This control is configured as POST-FADER, so the audio signal will be affected
by channel level control. Via the FX SEND socket, the AUX1 signal can be sent
to an external effect device.

EQUALIZER

Your OEX-400S features a 2-band equalizer allowing you to adjust the high and
low frequencies separately on each mono channel. Both bands provide up to
+15dB of boost or cut.

9 HIGH

This is the treble control. You can use it to get rid of high frequency noises or
to boost the sound of cymbals or the high harmonics of the human voice. The
gain range goes from -15dB to +15dB with a center frequency of 12kHz.

10 LOW

This is the bass control. It is used to boost male voice or kick-drum and bass
guitar. Your system will sound much bigger than what it is. The gain range
goes from -15dB to +15dB and the center frequency is 80Hz.

MP3

U

S

U

NORMAL

When the player is searching for Mp3 songs, the interface is as follows:

NORMAL

When the player is in pause state, the interface is as follows:

MP3 USB ERP

A L

ooo

NORMAL

When the player is in use, the interface is as follows:

MP3 USB ERP

L

ooo

NORMAL

S

MP3 and 9 BAND EQ selective mode section(Option)
No selective mode

JUMPER

CN7

CN9

At normal state, there is no selective mode on the front panel, only a piece of
panel without any painting and function. But there are two selective modes for

11

what you like, that is MP3 mode and 9 BAND EQ mode. Please note that on
the main mixer board, there is a short circuit row-wire in the CN9 header.

Mp3 selective mode

12

13

MP3 PLAYER

MP3 USB REP

00

03:08

MP3 MODULE

CN7

JUMPER

CN9

Please connect the 5PIN row-wire on the MP3 model to the CN7 header on
the main mixer board. Put the provided 8PIN short circuit row-wire in the CN9

DSP SECTION

Your OEX-400S features the special 16-preset digital effect, further details

header on the main mixer board. Then fix the MP3 model on the mixer panel
with two screws.

please refer to following content.

7 12

-

-

SPOTLIGHT

1

4. CONTROL ELEMENTS

SPOTLIGHT

4. CONTROL ELEMENTS

USB PORT

27

For connecting with USB memory.

PREVIOUS

28

In pause state, press this button it will go to the previous song and keep
in pause state. In play state, press this button it will go to the previous song
and start playing.

29

NEXT

11 PRESETS

Adjust this knob to select the right effect you wish to perform. There are total
16 options for you: WARM HALL,BRIGHT HALL, WARM ROOM, BRIGHT ROOM,
VOCAL 1, VOCAL 2, VOCAL 3, PLATE, STEREO DELAY1,STEREO DELAY2, REV
+ DELAY1, REV + DELAY2, REV + DELAY3, REV + DELAY4, REV + CHORUS1
and REV + CHROUS2.

12 PEAK/MUTE LED

This LED lights up when the input signal is too strong. In case of the digital
effect module being muted, this LED also lights up.

In pause state, press this button it will go to the next song and keep in
pause state. In play state, press this button , it will go to the next song
and start playing.

REPEAT

30

Press this button the player will change between the following four modes. REP
ALL means to repeat all songs in the memory, the mark on the screen is

REP1 means to repeat one song, the mark on the screen is Play in order

.

means to play the songs according to the order, the mark on the screen is
blank. Random play means to play the songs at random, the mark on the
screen is A.

PLAY/PAUSE

31

In play state, press PLAY/PAUSE button to pause the player. In pause state,
press PLAY/PAUSE button to start playing.

STOP

32

In play state, press STOP button to stop playing and the whole quantity
of Mp3 songs in the USB memory will display on the screen. In STOP
state, press the PRE/NEXT button or press the STOP button again to go

all

.

13 DSP MUTE SWITCH

This switch is used to activate/deactivate the effect facility.

POWER

OUTPUT

LEVEL

+10

+10

8

LEVEL

MASTER

PHONES

0

10

30

LR

21

18

0+10

10

8

FX RET LEVEL

20

LRIN

17

19

FX RETURNS

FX SEND

LOUTR

CD/TAPE

L

(MIN. LOAD 4 Ohms)

R

SPK.OUT

14

16

15

23

to the first songs and the player will keep in pause state, then press
down the PLAY/PAUSE button to play it.

POWER

33

When the unit is off, press this button and hold for about 2 or 3 seconds to
turn on the power supply of the player. Repeat the above operation, you can
turn off the power supply of the player.

14 POWER LED

When you switch on the apparatus,the LED will light on.

15 MASTER LEVEL CONTROL

This control is used to adjust the overall volume of main mix output, and the

2422

signal also input to the preamplifier.

NOTE: Basic interface instruction.

16 MASTER LEVEL LED

When the player isn't connected to a USB memory equipment, the interface
is as follows:

The 4-segment LED metre is used to indicate the master output level. When
the red LED lights on, it means that the MIX OUT reaches +10dB, or start
the compressor from the build in AMP.

11 8

S

P

O

T

L

IG

H

T

4. CONTROL ELEMENTS

S

P

O

T

L

IG

H

T

4. CONTROL ELEMENTS

17 FX RTN. Jack

Use the stereo phone jack to return the sound of an effect unit to the main
mix. You can also use it as a extra auxiliary stereo input.

18 FX RET CONTROL

This control is used to control the volume of the processed signal sent to
Main Mix bus, which can be varied from - to+10 dB.

19 FX SEND

This jack is used to send out the signals from AUX bus.

20 CD/TAPE IN

Use the Tape input to connect a CD Player, Tape, DAT, iPOD or any other line­level source.

21 CD/ TAPE LEVEL CONTROL

This knob controls the signal sent from CD/TAPE IN,which can be varied from

- to+10 dB.

22 CD/TAPE OUT

These RCA jacks will route the main mix signal into a tape or DAT recorder.

23 PHONES

This socket will be used to send the signal to a pair of headphones.

24 SPK. OUT

The SPEAKER L&R phone jacks output the main signal from the internal power
amplifier and are used to connect speakers. They are internally connected in
parallel and output the same signal.

Connecting two speakers

9 Band EQ section (Optional)

25 EQ Switch

Engage this button to add the stereo graphic EQ to the main mix output
circuit.It can be used to modify the frequency "contour" of a sound. If you
release the button, the stereo graphic EQ will be bypassed.

26 STEREO GRAPHIC EQ

Each one of these faders will boost or attenuate (+/-12 dB) the selected frequency
at a preset bandwidth. When all the faders are in the cent r position, the outpute
of the equalizer is flat response.

16K

8K4K

+12

+8

+4

0

-4

-8

-12

25

EQ OFF
EQ ON

+12

63

+8

+4

0

-4

-8

-12

STEREO GRAPHIC EQ

1K

500250125

2K

26

MP3 section (Optional)

The file system of USB memory for USB-MP3 player is FAT16 and FAT32. The
player can only decode MP3. It can have 7 rank subordinate folders at most,
and the maximum quantity of folders within MP3 files is 24. In the whole USB
memory, the total folders can not beyond 256(incluing those folders without
MP3 songs).

2728 29 30

MP3 PLAYER

MP3 USB REP

00

ALL

03:08

4~8

Note: The total impedance of the connected speaker system must be between

3231 33

4 and 8 ohms. Do not connect anything other than speakers to these jacks.

9 10