SHOW A 150.8 Switching Power Professional Amplifier User Manual

THE UNIVERSE OF INSTALLATION
SWITCHING POWER
PROFESSIONAL AMPLIFIER
User’s Manual
A 150.8
A150.16

SAFETY RELATED SYMBOLS

The symbol is used to indicate that some hazardous live terminals are involved within this apparatus, even under the normal operating conditions.
The symbol is used in the service documentation to indicate that specific component shall be only replaced bythe component specified in that Documentation for safety reasons.
** Protective grounding terminal.
Alternating current /voltage.
Hazardous live terminal .
ON: Denotes the apparatus turns on.
OFF: Denotes the apparatus turns off, bec- ause of using the single pole switch, be sure to unplug the AC power to prevent any electric shock before you proceed your service.
WARNING: Describes precautions that should be observed to prevent the danger of injury or death to the user.
Disposing of this product should not be placed in municipal waste and should be separate collection.
CAUTION: Describes precautions that should be observed to prevent danger of the apparatus.
WARNING**

• Power Supply
  Ensure the source voltage matches the voltage of the power supply before turning ON the apparatus.
  Unplug this apparatus during lightning storms or when unused for long periods of time.

• External Connection
  The external wiring connected to the output hazardous live terminals requires installation by an instructed person, or the use of ready-made leads or cords.

• Do not Remove any Cover
  There are maybe some areas with high voltages inside, to reduce the risk of electric shock, do not remove any cover if the power supply is connected. The cover should be removed by the qualified personnel only. No user serviceable parts inside.

• Fuse
  To prevent a fire, make sure to use fuses with specified standard (current, voltage, type). Do not use a different fuse or short circuit the fuse holder.
  Before replacing the fuse, turn OFF the apparatus and disconnected the power source.

• Protective Grounding
  Make sure to connect the protective grounding to prevent any electric shock before turning ON the apparatus. Never cut off the internal or external pro- tective grounding wire or disconnect the wiring of protective grounding terminal.

• Operating Conditions
  This apparatus shall not be exposed to dripping or splashing and that no objects filled with liquids, such as vases, shall be placed on this apparatus.

To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
Do not use this apparatus near water. Install in accordance with the manufacture-r’s instructions. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including am- plifiers) that produce heat. Do not block any ventilation openings. No naked flame sources, such as lighted candles, should be placed on the apparatus.
IMPORTANT SAFETY INSTRUCTIONS

• Read these instructions.
• Follow all instructions.
• Keep these instructions.
• Heed all warnings.

Only use attachments/accessories spec- ified by the manufacturer.
Power Cord and Plug
Do not defeat the safety purpose of the polarized or grounding type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your  safety. If the provided plug does not fit into your outlet, consult an electrician for replace- ment of the obsolete outlet. Protect the power cord from being walk- ed on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
Cleaning
When the apparatus needs a cleaning, you can blow off dust from the apparatus with . ablower or clean with rag etc.
Don’t use solvents such as benzol, alcohol, or other fluids with very strong volatility and flammability for cleaning the apparatus body. Clean only with dry cloth.
Servicing
Refer all servicing to qualified personnel. To reduce the risk of electric shock, do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so .
Servicing is required when the apparatus has been damaged in any way, such as power supply cord or plug is damaged , liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
The mains plug is used as the disconnec t device, the disconnect device shall remain readily operable.

INTRODUCTION

The A150.8/A150.16 switching power professional Amplifier is designed for professio nal use on stage. The high-quality components and the carefully designed circuits ensure excellent audio performance and an extremely linear frequency response. In fact, the switching technology offers, together with an increased efficiency and a better control of heat dissipation than conventional power supply systems, a drastic reduction of dimensions and weight, for easier transportation and installation.
This Amplifier guarantees total reliability and a trouble-free use even in the most demanding conditions.
We believe the A150.8/A150.16 will provide a perfect performance, what you get is unprecede nted performance at an incredibly attractive price.
Features:
High current switching power allowing high power output with low noise and low distortion
Substantial protection circuitry like thermal, short circuit, power o n/off mut ing and therefore protection
Built-in limiter
Euroblock input and output
Gain controls for easy access
Signal, Clip protect, and Power LED indicators to monitor performance.

FRONT PANEL

1. POWER LED
   The Green LED light up when the amplifier power on.

2. CLIP LED
   This red LED lights up when the input signal is too st rong. it is time to reduce input level until clip LED turns off.

3. SIGNAL LED
   These green LEDs light up when the respective channel’s output signal pass through.

4. PROTECTION LED
   In normal operation, the LED will not illume; If the LED turns red, it means the unit is in heat protection without sound o utput. The speaker system is actually disconnected from the ampli fier outpu ts wh en this LED is red, the temperature must be reduced by good ventilation and the signal level decreased etc , if the problem is resolv ed. the protection output systems will deactivate automatically, and norma l amplifier operation is resumed.

REAR PANEL

1. Power Switch
   It switches ON/OFF the unit main power.

2. AC Input
   Use it to connect your A150.8/A150.16 to the supplied AC cord.

3. Level Control
   These volume controls allow you to adjust the volume level.

4. Euroblock input
   INPUT +:balanced signal input+ or unbalanced signal input
   INPUT G:signal GND
   INPUT – :balanced signal input- or unbalanced signal not connect

5. Euroblock Output
   Connect the amplifier to your speakers using these Euroblock.

Exhaust Vents
Air is dr awn from front gri lles,fl owing through the unit and heat sink,and then exhausted via the rear vents. Do not block or impede the air flow through these vents and keep the vents areas free of foreign materials.

APPLICATIONS

Inputs connections
The inputs can be connected to the Euroblock socket using the female free part connectors supplied with the device.
For balanced inputs use Hot pin(+),Cold pin (-) and Ground pin (G) terminals.
For unbalanced inputs use Hot pin (+) and Ground pin (G) only.
Speaker connections
Check that the polarity is well respected for every speaker.Two Eroblocks connected point to point are available for easy paraller set up.The impedance output must not be higher than 2 Ohms per channel.

TECHNICAL SPECIFICATIONS

Electrical Specification
Input Sensitivity (Limit Off)| 0.9-1.1 V (0+/- I dBv)
Input Impedance| 20k ohms balanced or 10k Ohms unbalanced
Frequency Response (at 10dB Rated Output Power)| 20Hz — 20KHz(0+/- I dB)
Voltage Gain| 28+0/-0.5dB
THD+N (Ref.IK 1/8 Rated Pcaver,A-WeIgIted)| <0.1%
S/N rate (Ref. Rated Power, A-Weighted| >95dB
Crosstalk (Below Rated Power)| >70dB
Damping Factor( I K 8 ohms)| >200
Power/Output Circuitry| Switching Power Class D
General Specifications
Protections| Full short circuit, open circuit, thermal, ultrasonic, and RF protection stable into reactive or mismatched loads, turn ON/OFF, muting, tried crowbar.
Controls| Rear: AC switch, Input level control for each channel
Indicators| SIGNAL: 8 green
LED CLIP: 8 red LED
POWER: I green LED
PROTECTION: 8 red LED| SIGNAL: 16 green LED
CLIP: 16 red LED
POWER: I green LED
PROTECTION: 16 red LED
Connectors| Euroblock
Power Supply| I I OV- I 20V or 220V-240V AC 50/60 Hz ± 10%
Dimensions(mm)| 483(W)•360(D)•44(H)
Weight| 6.5kg(A150.8)| 7. I kg(A I 50. I 6)

IMPORTANT!
Please read this manual carefully before operating this unit for the first time.
Al rights reserved to SEIKAKU. Al features and content might be changed without prior Any photocopy, translation, or reproduction of partof his catalogue without written permission is forbidden. Copyright © 2009 SEIKAKU GROUP

SHOW® is a registered trademark of SEIKAKU TECHNICAL GROUP LIMITED
SEIKAKU TECHNICAL GROUP LIMITED
NO.1 LANE 17, SEC.2, HAN SHI WEST ROAD, TAICHUNG 40151, TAIWAN
tel: 886-4-22313737
fax: 886-4-22346757
www.show-pa.com
sekaku@sekaku.com
NF04814-1.1

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