OEX-400 - Loudspeaker ALTO - Free user manual and instructions
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| Product Type | Powered Portable PA Loudspeaker with Built-in Mixer |
| Brand | ALTO |
| Model | OEX-400 |
| Dimensions (HxWxD) | 984 x 440 x 460 mm (38.7 x 17.3 x 18.1 in) |
| Net Weight | 17.0 kg (37.5 lb) |
| Power Output (EIAJ) | 350 W |
| Speaker Configuration | 2-way coaxial, 10" woofer + 1" neodymium driver |
| Mixer Channels | 7: 3 mono (XLR/TRS) + 4 stereo (RCA) |
| DSP Effects | 16 presets (Hall, Room, Vocal, Plate, Delay, Chorus) |
| Inputs | 4 XLR mic, 1 stereo line (RCA), 2TK in |
| Outputs | 2 speakON jacks, monitor out, tape out, phones |
| Equalization | 2-band EQ per channel, 7-band graphic EQ on main mix |
| Enclosure Material | Plastic reinforced polypropylene with metal grille |
| Frequency Response | 65 Hz – 20 kHz (-10 dB) |
| Maximum SPL | 117.5 dB SPL (calculated) |
| Impedance | 8 Ω nominal (speaker), 4 Ω load (amplifier) |
| Power Supply | AC mains with voltage selector |
| Cleaning Instructions | Blow off dust or use dry cloth; no solvents |
| Safety Features | Overload, short circuit, thermal protection, soft clip limiter |
| Warranty | 1 year (requires registration within 10 days) |
| Included Accessories | Power cord, 2 speaker cables (10 m), 2 microphones (5 m), stand adaptors (optional) |
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USER MANUAL OEX-400 ALTO
natural_image
Three black speaker panels with visible sound equipment and control panel (no text or symbols)
natural_image
Exterior view of a black industrial vacuum cleaner (no text or symbols visible)SAFETY RELATED SYMBOLS
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)
4
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.
CAUTION
Describes precautions that should be observed to prevent damage to the product.
Disposing of this product should not be placed in municipal waste and should be Separate collection.
WARNING
- Power Supply
Ensure 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 electrical storms occur and when unused 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 registered electrician.
- Do Not Remove Any Covers
Within the product 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.
- 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.
- 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.
- 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 when in close proximity to water.
Do not install this product near any direct heat source. Do not block areas of ventilation. Failure to do so could result in fire.
Keep product away from naked flames.
IMPORTANT SAFETY INSTRUCTIONS
Read these instructions
Follow all instructions
Keep these instructions. Do not discard.
Heed all warnings.
Only use attachments/accessories specified by the manufacturer.
• 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 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.
- 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.
TABLE OF CONTENTS
- INTRODUCTION ....3
- FEATURES ....3
- CONTROL ELEMENTS ....5
- AUDIO CONNECTIONS....11
- PRESET LIST....12
- TECHNICAL SPECIFICATIONS ...... 13
- BLOCK DIAGRAM....15
- WARRANTY 16
1. INTRODUCTION
Congratulations! Now you are the owner of the OEX-400. The OEX-400 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-400 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-400, 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-400 panel there's a compact extractable 7-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 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-400, we recommend you to thoroughly read this owner's manual before installation and operation.
natural_image
Black plastic electronic device casing with mounting holes and a star symbol on the lid (no text or symbols visible)2. FEATURES
- Trolley appearance
- 2 (two-SPEAKER) + 1 (7-channel mixer super combination)
• One-way full-range speaker system - 4 XLR MIC input with ultra low noise microphone pre-amplifiers
- 1 stereo LINE input
- Warm, natural 2-band EQ for each channel
- Precision level control
• 24-bit DSP effects with powerful algorithms (16 presets) - Extremely high headroom offering excellent dynamic range
- Plastic reinforced cabinet (polypropilene)
• 350W (EIAJ) of Power - Two 10m speaker cables
- Two folding speaker
- Compartment for store following accessories
Accessory List:
①Power cord 1 IEC power cord ×
②Customized Speaker Cable 2 10m
③MIC 2 5m ×
④F-8 stands (optional)
⑤ F-3 stands (optional)
⑥F-8 stand adaptor (optional)
3. CONTROL ELEMENTS
3.1 MONO INPUT CHANNELS
You can connect balanced, low impedance microphones or a low level signal to the XLR socket. In addition, for CH4/5 you can connect a stereo input signal with RCA jack.
3.2 STEREO INPUT CHANNEL
There is CH1 through CH3, 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.
3.3 LEVEL CONTROL
This control is used to adjust the overall level of respective channel. The adjustable range goes from -∞ to +10dB.
3.4 DSP/FX AUX1 POST 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.
3.5 EQUALIZER
Your OEX-400 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.
HIGH 5
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.
LOW 6
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.
3.6 TPAE IN 7
The signal input of CH6/7 is used to connect to dual RCA jacks (left and right). If you wish to listen to your monitor from a tape recorder, DAT or cassette, please use these tape input jacks.
3.7 TAPE OUT 8
Via these jacks, you can route the main out signal into a tape recorder or DAT for recording.
Your OEX-400 is equipped with a graphic equalizer, and provides 7-band fader controls. Via these faders, you can boost or attenuate the selected frequency by 15dB at a preset bandwidth. When all faders are at the center position, the output of the equalizer is flat response. They are used to modify the frequency "contour" of a sound. The EQ function will be activated automatically as soon as you operate your OEX-400.
This LED indicates when the power is switched on in your OEX-400.
3.10 MONITOR LEVEL CONTROL 11
This control is used to adjust the level of monitor output.
3.11 MONITOR LEVEL LED 12
The 4-segment LED meter is used to indicate the monitor output level.
3.12 MONITOR OUTPUT 13
This jack is used to connect the output of stereo monitor signal.
This control is used to adjust the overall volume of main mix output, and the signal also input to the preamplifier.
3.14 MASTER LEVEL LED 15
The 4-segment LED meter is used to indicate the master output level.
3.15 FX RETURN 16
This jack is used to return the sound of an effect unit to the main mix. You can also use it as the extra auxiliary inputs.
3.16 FX SEND 17
This jack is used to send out the signals from AUX bus.
3.17 PHONE 18
This 1/4" stereo phone jack is used to connect the stereo phone.
3.18 FOOTSWITCH 19
You can connect an external footswitch to turn on/off the onboard effect module. It is a 1/4 " phone jack.
3.19 MASTER SPK 20
The SPEAKER 1&2 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.
Note : The total impedance of the connected speaker system must be between 4 and 8 ohms. This means that you can connect one speaker system with an impedance of between 4 and 8 ohms to one SPEAKER jack, or two speaker systems each with an impedance of between 8 and 16 ohms to each SPEAKER jack. Do not connect anything other than speakers to these jacks.
3.20 DSP SECTION
Your OEX-400 features the special 16-preset digital effect, further details please refer to following content.
- DSP RET 21
This control is used to adjust the volume of DSP RETURE.
- DSP EFFECT ON 22
This switch is used to activate/deactivate the effect facility. Sometimes, you can also use the FOOTSWITCH jack for convenient operation.
- PRESETS 23
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.
- CLIP/MUTE LED 24
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.
3.21 REAR PANEL
- POWER ON/OFF 25
This switch is used to turn the main power ON/OFF.
- AC inlet 26
This jack is used to connect the unit to the mains with the enclosed power cord. (Depends on applicable country regulations)
- AC SELECT 27
Before connecting the OEX-400 to the mains supply first check that the Voltage Selector is showing the correct voltage for your country.
4. AUDIO CONNECTIONS
You can connect unbalanced equipment to balanced inputs and outputs. Simply follow these schematics.
1/4" Stereo (TRS) Jack Plug
Use for Mono Line In, Mono 1/4"Jack Plugs
1/4" Mono (TS) Jack Plug
Use for Insert Points
2=Hot(+)
1/4" Stereo (TRS) Jack Plug
Use for Balanced Mic Inputs (For unbalanced use, connect pin 1 to 3)
(seen from soldering side)
2=Hot(+)
3-pin XLR Male Plug
Use for Main output
(For unbalanced use, leave pin 3 unconnected)
(seen from soldering side)
3-pin XLR Line Socket
- PRESET LIST
| No. | Preset | Description | parameter |
| 1 | WARM HALL | Simulate a small acoustic space of the sound. | Rev. Decay time: 360msPre-delay: 45ms |
| 2 | BRIGHT HALL | Simulate a large acoustic space of the sound. | Rev. decay time: 290msPre-delay: 23ms |
| 3 | WARM ROOM | Simulate a small acoustic space of the sound. | Rev. decay time: 210msPre-delay: 45ms |
| 4 | BRIGHT ROOM | Simulate a studio room with many early reflections. | Rev. Decay time: 210msPre-delay: 23ms |
| 5 | VOCAL 1 | Simulate a room with without delay time. | Rev. decay time: 450ms |
| 6 | VOCAL 2 | Simulate a room with small delay time. | Rev. decay time:240msPre-delay: 25ms |
| 7 | VOCAL 3 | Simulate a small space with slight decay time. | Rev. decay time:100msPre-delay: 114ms |
| 8 | PLATE | Simulate the transducers sound like classic bright vocal plate. | Pre-delay: 10msRev. decay time: 290ms |
| 9 | STEREO DELAY 1 | Recreate the input sound on the stereo output with different time. | Period: 352ms |
| 10 | STEREO DELAY 2 | Recreate the input sound on the stereo output with different time. | Period: 238ms |
| 11 | REV + DELAY 1 | Delay with room effect. | Delay period: 326msRev. decay time: 290ms |
| 12 | REV + DELAY 2 | Delay with room effect. | Delay period: 211msRev. decay time: 240ms |
| 13 | REV + DELAY 3 | Delay with room effect. | Delay period: 375msRev. decay time: 210ms |
| 14 | REV + DELAY 4 | Delay with room effect. | Delay period: 277msRev. decay time: 150ms |
| 15 | REV + CHORUS1 | Simulate the sound effect achieved by rotating horn speakers and a bass cylinder. | Chorus rate: 3.67HzRev. decay time: 290ms |
| 16 | REV + CHORUS2 | Simulate the sound effect achieved by rotating horn speakers and a bass cylinder. | Chorus rate: 3.02HzRev. decay time: 150ms |
6. TECHNICAL SPECIFICATIONS
- Mixer Section
| Mono input channels (CH1~3) | Microphone input | Electronically balanced, discrete input configuration |
| Frequency response | 10Hz to 50KHZ, +/- 3dB | |
| Distortion (THD&N) | 0.04% at 0dBu, 1KHz | |
| Input level | -15dBu | |
| SNR(Signal to Noise Ratio) | >94dB | |
| Line input | Electronically balanced/unbalanced | |
| Frequency response | 10Hz to 50KHZ, +/- 3dB | |
| Distortion (THD&N) | 0.015% at 0dBu, 1KHz(DSP EFFECT OFF, TAPE OUT) | |
| Input level | 0dBu | |
| Stereo input channels (CH4~7) | Line input | Balanced/Unbalanced |
| TAPE input | Unbalanced, RCA phone | |
| Input level | 0dBu | |
| Frequency response | 10Hz to 50KHZ, +/- 3dB | |
| Distortion (THD&N) | 0.015% at 0dBu, 1KHz(DSP EFFECT OFF, TAPE OUT) | |
| Impedances | Microphone input | 3.9KΩ |
| All other inputs | 10KΩ or greater | |
| Tape out | 2.2KΩ | |
| All other outputs | 120Ω | |
| Equalization | Hi shelving | +/- 15dB@12KHz |
| Low shelving | +/- 15dB@80KHz | |
| 7-band graphic (Main Mix) | +/- 15dB@63Hz, 160Hz, 400Hz, 1KHz, 2.5KHz, 6.3KHz, 16KHz | |
| DSP Section | A/D and D/A converters | 24bit |
| DSP resolution | 24bit | |
| Type of effects | HALL, ROOM, VOCAL, PLATE, STEREO DELAY | |
| REV+DELAY, and REV+CHORUS combinations | ||
| Presets | 16 | |
| Controls | 16-position PRESET selector | |
| CLIP LED | ||
| MUTE SWITCH with LED indicator | ||
| Main Mix Section | Noise (Bus noise) | Fader 0 dB, channels muted: -85dBr (ref.: +4dBu) |
| Fader 0 dB, all input channels assigned and set to UNITY gain: -81dB (ref.: +4dBu) | ||
| MONITOR out | Output level:0dB | |
| Max out +22dBu unbalanced, 1/4" stereo jacks | ||
| 4 element LED display:-30/-10/0/+10dB | ||
| MASTER | Output level:0dB (AMP INPUT LEVEL) | |
| 4 element LED display:-30/-10/0/+10dB | ||
| FX Sends output | Output level:0dB | |
| Max out +22dBu unbalanced, 1/4" jacks | ||
| Aux return | Input level:0dBu, 1/4" stereo jacks | |
| Tape out | Output level:0dBu | |
| Headphones output | Min impedance:32Ω | |
| Output level:2×150mW |
- Speaker Section
| Passive System Type | 2-way Coax vented box |
| Continuous Power | 150Watt AES Standard |
| Peak Power | 300Watt Peak |
| Max SPL at 1M | 117.5dB SPL calculated |
| Frequency Response | 65Hz / 20kHz at -10dB |
| Impedance | 8Ω nominal |
| Crossover Frequency | 2.3kHz / 12dB/Oct |
| Protection | Electronic on the Driver |
| Coaxial Type Low Frequency Device | 10" Woofer / 2" Voice Coil |
| High Frequency Device | 1" Neodymium Driver / 1" Voice Coil |
| Coverage H×V | 70° H×70° V Spherical horn |
| Connectors | Power Input with mono Jack |
• Power Section
| Cabinet | Plastic Reinforced Polypropylene /Metal Grille/Integrated Handle |
| Output Power | 350WATT EIAJ (300WATT RMS) |
| Impedance | 4Ω Load |
| S/N ratio | >110 dB/A |
| Distortion | <0.05%(THD, DIM, SMPTE) |
| Gain | 32dB |
| Bandwidth | 10Hz to 50kHz |
| Protections | Overload / Short Circuit / Soft Clip Limiter / Thermal Protection Fan Cooling |
- Physical
| Dimensions H×W×D | 984*440*460mm(38.7"×17.3"×18.1") |
| Net Weight (lbs/kg) | 17.0kg |
| Cross Weight | 27.0Kg |
flowchart
graph TD
subgraph Power Meters
A["POWER R MODEII RMS 300W"] --> B["POWER_CONNECT"]
B --> C["POWER S UPPLY OEX-400_MIXER"]
C --> D["MONITOR OUT STER EO OUT PUT"]
D --> E["PHONE S OUT STER EO OUT PUT"]
E --> F["FOOTSWIT CH"]
end
subgraph Control Components
G["7-STAGE EQ"] --> H["LOW/BOOST"]
H --> I["MONITOR LEV EL"]
I --> J["MASTER METER"]
J --> K["MONITOR METER"]
K --> L["POWER_CONNECT"]
L --> M["POWER R MODEII RMS 300W"]
end
subgraph Audio Components
N["2-STAGE EQ"] --> O["LE VE L"]
O --> P["DSP/FX AUX1 POST"]
P --> Q["DISP/BOX AUX1 POST"]
Q --> R["DISP/BOX AUX1 POST"]
R --> S["DISP/BOX AUX1 POST"]
S --> T["AUX RETURN RN LEV EL"]
T --> U["AUX RETURN RN"]
end
subgraph Audio Control
V["CH INPUT (CH-45 BA UNBA L)"] --> W["X1-3A XL R TR S"]
W --> X["X1-3B XL R TR S"]
X --> Y["X9 XL R"]
Y --> Z["X9 XL R"]
Z --> AA["CH INPUT CH-45 BA UNBA L"]
AA --> AB["X4 LEFT TIMONI"]
AB --> AC["X5 RIGHT"]
AC --> AD["TAPE OUT TA PE IN"]
AD --> AE["X6 STEREO INPUT"]
AE --> AF["AUX RETURN RN"]
end
subgraph Audio Components
AG["DISP BOARD"] --> AH["DISP/BOX AUX1 POST"]
AH --> AI["DISP/BOX AUX1 POST"]
AI --> AJ["AUX RETURN RN LEV EL"]
AJ --> AK["AUX RETURN RN"]
end
style Power Meters fill:#f9f,stroke:#333
style Audio Components fill:#ccf,stroke:#333
8. WARRANTY
8.1 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.
8.2 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.
SEIKAKU TECHNICAL GROUP LIMITED
No. 1, Lane 17, Sec. 2, Han Shi West Road, Taichung 40151, Taiwan
http://www.altoproaudio.com Tel: 886-4-22313737
email: alto@altoproaudio.com 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 manual without written permission is forbidden. Copyright © 2008 SEIKAKU GROUP
- SAFETY RELATED SYMBOLS
- WARNING
- CAUTION
- - Power Supply
- - External Connection
- - Do Not Remove Any Covers
- Covers should be removed by qualified service personnel only.
- - Fuse
- - Protective Ground
- - Operating Conditions
- IMPORTANT SAFETY INSTRUCTIONS
- • Power Cord and Plug
- - Cleaning
- - Servicing
- TABLE OF CONTENTS
- INTRODUCTION
- FEATURES
- Accessory List:
- CONTROL ELEMENTS
- MONO INPUT CHANNELS
- STEREO INPUT CHANNEL
- LEVEL CONTROL
- DSP/FX AUX1 POST CONTROL
- EQUALIZER
- HIGH 5
- LOW 6
- TPAE IN 7
- TAPE OUT 8
- MONITOR LEVEL CONTROL 11
- MONITOR LEVEL LED 12
- MONITOR OUTPUT 13
- MASTER LEVEL LED 15
- FX RETURN 16
- FX SEND 17
- PHONE 18
- FOOTSWITCH 19
- MASTER SPK 20
- DSP SECTION
- REAR PANEL
- - POWER ON/OFF 25
- - AC inlet 26
- - AC SELECT 27
- AUDIO CONNECTIONS
- TECHNICAL SPECIFICATIONS
- WARRANTY
- WARRANTY REGISTRATION CARD
- RETURN NOTICE
- TERMS AND CONDITIONS
Brand : ALTO
Model : OEX-400
Category : Loudspeaker