OEX900

User's Manual

LTO www.altoproaudio.com

Version 1.2 May 2005

SAFETY RELATED SYMBOLS

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

Fuse

To prevent fire and damage to the product, 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.

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

Before turning the product ON, make sure that it is connected to Ground. This is to prevent the risk of electric shock.

Never cut internal or external Ground wires.

Likewise, never remove Ground wiring from the Protective

Ground Terminal.

Protective Ground Terminal

AC mains (Alternating Current)

Hazardous Live Terminal

ON: Denotes the product is turned on.

OFF: Denotes the product is turned off.

WARNING

Describes precautions that should be observed to prevent the possibility of death or injury to the user.

Operating Conditions

Always install in accordance with the manufacturer's instructions.

To avoid the risk of electric shock and damage, do not subject this product to any liquid/rain or moisture.

Do not use this product in close proximity to water.

Do not install this product near any direct heat source.

Do not block ventilation areas.

Failure to do so could result in fire. Keep product away from naked flames.

CAUTION

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

IMPORTANT SAFETY INSTRUCTIONS

WARNING

Power Supply

It ensures that the mains source voltage (AC outlet) matches the voltage rating of the product. Failure to do so could result in damage to the product and possibly the user.

Unplug the product before and during elect rical storms and when the mixer is not going to be used for long periods of time to reduce the risk of electric shock or fire.

External Connection

Always use proper ready-made insulated mains cabling

(power cord). Failure to do so could result in shock/death or fire. If in doubt, seek advice from a regis tered electrician/ authorized maintenance centre.

Read these instructions

Follow all instructions

Keep these instructions. Do not discard.

Heed all warnings.

Only use attachments/accessories specified by the

manufacture

Power Cord and Plug

Do not tamper with the power cord or plug. These are designed for your safety.

Do 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 an y physical stress to avoid risk of electric shock.

Do not place heavy objects on the power cord. This could cause electric shock or fire.

Do Not Remove Any Covers

Within the product there are areas where high voltages may present. To reduce the risk of electric shock do not remove any covers unless the AC mains power cord is removed.

Covers should be removed by qualified service personnel only.

No user serviceable parts inside.

Cleaning

When required, either blow off dust from the product or use a dry cloth.

Do not use any solvents such as Benzol or Alcohol.

For safety, keep product clean and free from dust.

Servicing

Refer all servicing to qualified service personnel only.

Do not perform any servicing other than those instructions contained within the User's Manual.

1

TABLE OF CONTENTS

1. INTRODUCTION ...................................................................................................................................3

2. FEATURES ............................................................................................................................................3

3. QUICK START .......................................................................................................................................5

4. CONTROL ELEMENTS ........................................................................................................................8

5. PRESET LIST .....................................................................................................................................12

6. OEX900 WIRING GUIDE ....................................................................................................................13

7. TECHNICAL SPECIFICATIONS ........................................................................................................14

8. WARRANTY ........................................................................................................................................16

2

1. INTRODUCTION

Congratulations! Now you are the owner of the OEX900 . The OEX900 is a plastic reinforced trolley that includes a versatile mixer with DSP effects, L&R full range speaker cabinets and sub-woofer, and some essential accessories such

as power cord, signal cables, speaker cables, and speaker stands. The OEX900 adopts an optimal crossover network and

advanced power amplifier technologies, which ensures its incredible versatility and excellent audio performances.

The L&R speaker cabinets are tightly hooked on the trolley . When you operate the OEX900, take care of the setting of the L&R cabinets first. It is the development of ALTO's experience and knowledge of speaker technology, in order

to create a system which can faithfully reproduce sound for each kind of applications.

The sub-woofer is built in trolley. It contains a 15" low speaker, which delivers a natural and powerful sound and that

will bring you unprecedented low frequency emission.

Inlaid in OEX900 panel there's compact extractable 8-channel mixer, which uses 24-bit A/D&D/A converters and 24bit DSP effects with accurate algorithms (256 presets). It also provides 6 MIC inputs with ultra low noise microphone pre-amplifiers and+48V PHANTOM power at as well as warm, natural 3-band EQ; AUX send/return and 2TK in/out and so on.

In a word, it is ideally suited for live sound applications, small venues applications, recording and other musical purposes.

In order to get the best from your OEX900, we recommend you

to thoroughly read this owner's manual before installation and

operation.

2. FEATURES

Trolley appearance

2(two-way satellites) + 1(subwoofer) + 1 (8-channel mixer super combination)

Three-way full-range speaker system with 15" subwoofer

6 XLR MIC input with ultra low noise microphone pre-amplifiers and +48VPHANTOM power

2 stereo LINE input

Warm, natural 3-band EQ for each channel

Precision level control

24-bit DSP effects with powerful algorithms (16 presets with16 variations each)

Extremely high headroom offering excellent dynamic range

Plastic reinforced cabinet (polypropylene)

High power output with 300W (L&R speaker) / 300W (subwoofer)

Two 7 m speaker cables

Two F8 folding speaker stands

Compartment for storing F8 folding stands, speaker cables, signal cable and power cord etc.

Accessory List:

Folding speaker stands 2 F8

Power cord 1 IEC power cord

Signal cable 1 2m

Customized Speaker Cable 2 7m

3

In following picture you see OEX900 most important components.

High quality L&R full range speaker cabinets

Powerful sub-woofer

Versatile multi-channel mixer

4

3. QUICK START

Though the OEX900 looks like a super formidable giant, you don't have to worry about how to carry it. As the OEX900 is equiped with two wheels, you can think of it as a trolley. Seeing is believing. Operating this unit, you will find that it is really versatile and user-friendly. Following steps will give you a guide line to set up your OEX900.

Note: Make all initial connections with the system powered off, and, in order to avoid damaging your speakers and

excessive noise, with main mix volume control of the mixer completely turned down.

First of all extract the F8 folding speaker stands from their compartment, as shown in Fig.1. Then, as shown in

Fig.2, unhook, the L&R speaker cabinets from the trolley in the right direction, unsuitable operation may damage your equipment. In order to prevent equipment damage, please place the speaker stands on a solid, even surface.

Fig.1

Fig.2

Fix the L&R speaker cabinets on stands. as shown in Fig.3.

Note: In order to avoid feedback, please position the speakers facing the audience and far away from the microphone.

Fig.3

Fig.4

Then, position the sub-woofer(trolley). Please be careful about this step, as shown in above Fig.4 proper position will allow the sub-woofer to develop his full power and sound character.

Depending on application requirements, you can disassemble or not the mixer from the trolley. For this application 2m. signal cable is available, as shown in following Fig.5.

Fig.5

5

After that, set up the system.

Note: During this step too the system must be powered off, and , in order to avoid damaging your speakers and/or to

produce noise the mixer main volume control should be competently turned off.

Connect one side of the speaker cable to the left/right power outputs (speakon connectors) of system, and the other side to the left/right speaker cabinets (speakon connectors), as shown in Fig.6.

Warning! Do not connect additional speakers to the powered output. The supplied system speakers provide a perfect load for the built-in amplifier.

Fig.6

Make sure that the mixer has been connected to the system by using the appropriate connector and the

customized cable, as shown in Fig.7.

Fig.7

Connect Microphone, CD, Tape or MD player (Line sources) etc. to the appropriate MIC/LINE mixer

i nput connectors (XLRor1/4"TRS jacks), as shown in Fig.8.

Fig.8

Now you can turn on the power switch.

Turn up the volume control, use the PFL function to get the proper input level for each mixer channel, then adjust

the main mix level control to manage the output level.

6

At the end of your session, put all your levels to zero, turn off your system, then collect all the cables and put them back in their places all accessories into assigned storage compartment. Finally, lay the speakers face down on

top of trolley and secure the six latches. Now the OEX900 is ready to be carried everywhere.

OEX900

Stand

Stand

VOCAL

Fig.9

Stereo program source

Such as CD player, MD

Player or other Line sources...

7

(24)

(27)

(25)

(26)

(3)

(17)

(20)

(19)

(23)

(21)

(22)

4.CONTROL ELEMENTS

(1) (2) (4) (8) (7) (6) (5)

L

O

P

M

A

L

O

P

M

A

P

M

A

L

O

L

O

P

M

A

L

O

P

M

A

L

O

P

M

A

8

8

8

8

8

8

8 8

8 8

8 8

8 8

8 8

8 8

8

8 8

(16)

(14)

(13)

(15)

(18)

(12) (10) (11) (9)

8

(1). MIC IN

These electronically balanced XLR sockets have been designed to accept microphone signals, providing low

noise microphone pre-amplifier, as well as phantom power for condenser microphone by pressing the PHANTOM

power switch.

Note: You shall never connect an unbalanced microphone to the XLR socket if you don't want to damage both

the microphone and mixer.

(2). LINE IN

These balanced 1/4"TRS jacks have been designed to accept line level inputs such as keyboards outputs, CD,

players, MD/tape outputs, etc...

(3). Stereo Input

This channel is equipped with two 1/4" TRS jacks for stereo input. Connecting the left input jack only, the input will

operate in mono mode. Furthermore, it also provides the XLR connector for MIC input. The OEX900 is provided

with two stereo channels.

(4). 20dB PAD

Pressing this button the input signal will be attenuated by 20dB. In such way you'll obtain increased headroom and you"ll reduce the risk of distortion due to input level peaks with too high input signal.

(5). Equalizer

Each channel is equipped with 3-band warm, natural EQ: HI, MID and LOW bands will allows you to shape the sound of program material in a very efficient way.

HI

Treble control. You can use it to get rid of high frequency noises or to boost the sound of cymbals and human voice higher harmonics. The gain range can be varied from -15dB to +15dB with a center frequency of 12kHz.

MID

Midrange control. It can affect most fundamental frequencies of all musical instruments and human voice. A

careful use of this control will give you a very wide panorama of sound effects. The gain range can be varied from

-15dB to +15dB with a center frequency of 2.5kHz.

LOW

Bass control. It can boost male voice or kick-drum and bass guitar. Your system will seem much bigger than it really is. The gain range can be varied from -15dB to +15dB with a center frequency of 80Hz.

(6). AUX Sends

Both these controls are used to adjust the level of signal sent to AUX buses. These sends contrals are adjus- table in to +15dB.The MON (AUX1) control is configured PRE-FADER, it means that its signal is independent by channel fader setting. It is suited to be used as monitor mix in a live sound mixing, or for a headphone mix in recording application. The(AUX2) control is configured as POST-FADER, it means that the audio signal will be affected by channel fader settings. This signal is assigned to onboard DSP(digital effects module). Via AUX2 OUT connector the AUX2 signal can be sent to an external effect device.

(7). PAN/BAL Control

The pot controls the channel's position between left and right in the stereo bus. Of course you can use it to"move" the channel signal in stereo front to create spatial effects as well as.

(8). LEVEL Control

This pot provides smooth control over levels.

(9). OPERATING LED Display

The LED indicates when OEX900 power is switched ON.

(10). Graphic EQ

OEX900 is provided with two graphic EQs, one for MAIN MIX, the other for MONITOR MIX. These graphic EQ have

7-band fader controls. Via these faders, you can boost or attenuate the selected frequency by 15dB at a preset bandwidth. They are used to modify the frequency "contour" of sound, to adapt it to your musical taste and

ambient characteristics. When all faders are at the center position, the equalizer has flat response.

9

(11). MONITOR LEVEL Control

This control adjusts the level of monitor output by a range of to +10dB.

(12). MAIN LEVEL Control

By rotating this pot you'll simultaneously adjust the overall volume of the left and right main mix outputs in

to +10dB.

(13). PRESETS Control (DSP Section)

Adjust this knob to select the effect you wish to perform. There are 16 options available: several kinds of reverb, mono and stereo delay, modulation effects, and versatile two-effect combinations.

(14). VARIATIONS Control

This control provides 16 variations for each preset, each variation has been designed modifying several parameters. For further details, please refer to chapter 5.

(15). PEAK LED

This LED is lit when the DSP input signal is too strong. This LED is lit when the DSP is muted too.

(16). DSP MUTE Switch

This switch serves to activate/deactivate the built-in effect section. For your convenience you can also use the FOOT SW for this operation.

(17). FOOT SW. Jack

This 1/4" phone jack can be used to connect an external foot-switch to turn on/off the built-in effect module.

(18). AUX/DFX RET

This pot adjusts the internal/external effect from 0 to 10.

(19). AUX2 OUT

This 1/4" phone jack outputs AUX2 bus line signal.

(20). STEREO RTN

This1/4" phone jack is used to return the signal of external unit to the main mix. You can also use it as an extra auxiliary input.

(21). TAPE IN/OUT

These RCA connectors are useful to connect the output/input of a DAT, cassette or taper recorder.

(22). TAPE TO Switch

Pushing this switch to left, TAPE IN signal will be routed to CH7-8 path, so the signal will be controlled by

channel level control and main level control. Pushing this switch to right, the TAPE IN signal will be derectly routed to main mix bus, and its signal will be affected by main level control only.

(23). 2TK IN Control

This pot adjusts the level of 2TK IN signal in to MAX range.

(24). MAIN OUT

These connectors output left and right main mix. You can use these connectors to output the main mix signal to external PA system or active speakers.

(25). MONITOR OUT

This1/4" phone jack outputs the signal from MON (AUX1) bus to the input of external monitor amplifier or active monitor speaker.

(26). HEADPHONE OUT

This1/4" stereo phone jack can be used to connect stereo headphones.

(27). PHANTOM Switch

Via this switch, you can turn on/off the +48V phantom power for all microphone pre-amps.

10

(28). AC INLET with FUSE HOLDER

Standard IEC receptacle, connect your OEX900 to mains with the supplied power cord.

(29). POWER Switch

It switches on/off the OEX900 main power.

(30). Powered Output Connectors

These 4-way speakon type connectors are used to output the powered signal to L&R speaker cabinets.

Note: in order to avoid damaging your built-in amplifier, please pay attention to speaker impedance.

Lower load impedance is not permitted.

(29) (28) (30)

11

5. PRESET LIST

No.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

Preset

VOCAL 1

VOCAL 2

LARGE HALL

SMALL HALL

LARGE ROOM

SMALL ROOM

PLATE

Description

Simulate a room with small delay time.

Simulate a small space with slight decay time.

Simulate a large acoustic space of the sound.

Simulate a small acoustic space of the sound.

Decay time

Pre-delay

Decay time

Pre-delay

Simulate a studio room with many early reflections.

Decay time

Pre-delay

Simulate a bright studio room.

Simulate the transducers sound like classic bright vocal plate.

Controllable parameter

Parameter Variable range

Decay time

Pre-delay

Decay time

Pre-delay

0.8~1.1s

0~79ms

0.8~2.5s

0~79ms

Decay time

Pre-delay

Decay time

Pre-delay

3.6~5.4s

23~55ms

1.0~2.9s

20~45ms

2.9~4.5s

23~55ms

0.7~2.1s

20~45ms

0.6~6.1s

10ms

TAPE REVERB Simulate a record head and multiple playback heads at intervals along the tape.

Decay time

Pre-delay

SPRING REVERB Simulate the analog transducers' springs lightly Decay time stretched sound. Pre-delay

MONO DELAY

STEREO DELAY

FLANGER

CHORUS

REV.+DELAY

1.3~5.4s

0~84ms

1.3~5.4s

0~35ms

Reproduce the sound input on the outputafter a lapse of time.

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

Simulate to play with another person carryingout sam e the notes on the same instrument

Period

Feedback

Rate

210~400ms

37~73%

0.16~2.79Hz

Recreate the illusion of more than one instrument from a single instrument sound

Rate

Delay with room effect Delay period

Rev. decay time

0.5~5Hz

211~375ms

1.0~2.9s

REV.+FLANGER

REV.+CHORUS

Stereo chorus and large room reverb Flanger Rate

Rev. decay time

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

Chorus rate

Rev. decay time

0.16~2.52Hz

1.5~2.9s

0.5~4.74Hz

1.5~2.9s

12

6. OEX900 WIRING GUIDE

Defective wiring may degrade the performance of OEX900 product so, please, use good quality screened audio cable. Please follow the descriptions below to connect the OEX900 with external equipment, without experiencing any noise or signal loss.

Model

Input/Output

Connector

MIC IN

Type

XLR

Description

PIN1 = Screen / Ground

PIN2 = Hot Signal

PIN3 = Cold Signal

Diagram

1/4" jack

+

-

LINE IN 1/4" jack TRS

TIP = Hot

RING = Cold

SLEEVE = Screen

Ring

Tip

Sleeve

TRS Type Balanced

+

AUX SEND 1/4" jack TS

TIP = Hot

SLEEVE = Screen

Mixer

Section

TAPE IN RCA

TIP = Hot

SLEEVE = Screen

Ring

Tip

Sleeve

TRS Type Unbalanced

+

Main Output

Section

TAPE OUT

POWERED

OUTPUT

RCA

4-way speaker

connector

TIP = Hot

SLEEVE = Screen

MIX OUT 1/4" jack TRS

TIP = Hot

RING = Cold

SLEEVE = Screen

HEADPHONE 1/4" jack TRS

POWER

CONNECTOR

SCM

TIP = Hot

RING = Cold

SLEEVE = Screen

PIN1= AC IN (+18V)

PIN2= PGND

PIN3= AC IN (-18V)

PIN4= OUT - GND

PIN5= SUB OUT

PIN6= L OUT HI

PIN7= R OUT HI

PIN8= C - GND

Speaker

Section

SPEAKER IN 4-way speaker

connector

1+,1-,2+,2-

1+,1-,2+,2-

Tip

Sleeve

TS Type Unbalanced

RCA Connector

+

SCM

XLR connector

Pin3 (-)

Pin2 (+)

Pin1 ( )

XLR Type Balanced

Pin2 (+)

Pin3 (-)

(Linked to Pin1 manually, )

Pin1 ( )

XLR Type Unbalanced

13

7. TECHNICAL SPECIFICATIONS

Mixer Section

Mono input channels Microphone Input Electronically balanced, discrete input configuration

Distortion(THD&N)

Gain

0.04% at +4dBu,1kHz

30dB

Line input

Electronically balanced

Stereo input channels

Distortion(THD&N)

Gain

Line input

Impedances

Equalization

DSP Section

Main Mix Section

0.04% at +4dBu,1kHz

10dB

Unbalanced

Distortion(THD&N)

Microphone Input

0.04% at +4dBu,1kHz

1.4kOhm

Channel Insert return 2.5kOhm

All other inputs 10kOhm or greater

Tape out 1kOhm

All other outputs

Hi shelving

120Ohm

+/-15dB@12kHz

Mid bell

Low shelving

A/D and D/A converters

DSP resolution

Type of effects

+/[email protected]

+/-15dB@80Hz

24bit

24bit

Hall,Room,Vocal&Plate REVERBS

Mono & Stereo DELAY (max DELAY TIME 650ms)

Chorus,Flanger & Reverb MODULATIONS

REVERB+DELAY,REVERB+CHORUS,

REVERB+FLANGER combinations

Presets

Controls

Noise(Bus noise)

256

16-position PRESET selector

16-position VARIATION selector

CLIP LED

MUTE SWITCH with LED indicator

Fader 0 dB,channels muted:-85dBr (ref.:+4dBu)

Fader 0 dB,all input channels assigned and set to

UNITY gain:-81dBr(ref.:+4dBu)

Max output

Controls

AUX Sends max out

+27dBu balanced

+22dBu unbalanced, 1/4" jacks

+22dBu

14

Speaker Section

3-Way Powered System Bi-Amp plus passive crossover into Satellite

Low Output Power

300W RMS Class H

Peak Power Rating 1200W Peak

Impedance Low-Mid/High Low 4ohm - Mid/High 8ohm

with Electronic Dynamic Protections.

Amplifier Protections

Low-Mid/High

Soft Start - Short Circuit - DC output voltage

-Thermal Protection - Subsonic Filter at

30Hz - 24dB/Oct. - Limiter / Compressor.

Low Frequency Device 15" / 385mm - 2.5" Voice Coil

Mid Frequency Device 2 x 6.5" / 165mm - 1.5" Voice Coil

High Frequency Device 1" Compression Driver - 1" Voice Coil

Horn Coverage H x V 80 H x 80 V

Plastic Reinforced Cabinet Polypropilene

Physical

Dimension(W*D*H)

Net Weight

Gross Weight

1060*700*700mm

43.04kg

60.04kg

15

8. WARRANTY

7.1 WARRANTY REGISTRATION CARD

To obtain Warranty Service, the buyer should first fill out and return the enclosed Warranty Registration Card within

10 days of the Purchase Date.

All the information presented in this Warranty Registration Card gives the manufacturer a better understanding of the sales status, so as to purport 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.

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

b. 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.

c. A brief description of the defect will be appreciated. d. Please prepay all the costs involved in the return shipping, handling and insurance.

3. TERMS AND CONDITIONS a. 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. b. 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.

c. During the warranty service, LTO 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.

d. 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.

e. In no event shall LTO 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.

f. 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.

16

SEIKAKU TECHNICAL GROUP LIMITED

SEKAKU ELECTRON INDUSTRY (H.K.) CO., LTD.

No. 1, Lane 17, Sec. 2, Han Shi West Road, Taichung 40151, Taiwan http://www.altoproaudio.com Tel: 886-4-22313737 email: [email protected] Fax: 886-4-22346757

All rights reserved to ALTO. All features and content might be changed without prior notice. Any photocopy, translation, or reproduction of part of this

NF 02057-1.2