SEIKAKU AH150.8 Switching Power Professional Amplifier User Manual

SWITCHING POWER
PROFESSIONAL AMPLIFIER
User’s Manual
AN 150.8

IMPORTANT!
Please read this manual carefully before operating this unit for the first time.

All rights reserved to SEIKAKU. All features and content might be changed without prior notice. Any photocopy, translation, or reproduction of part of this catalogue without written permission is forbidden. Copyright © 2009 SEIKAKU GROUP

SAFETY-RELATED SYMBOLS

**** The symbol is used to indicate that some hazardous live terminals are involved within this apparatus, even under normal operating conditions.

**** The symbol is used in the service documentation to indicate that a specific component shall be only replaced by the 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, because of using the single pole switch, be sure to unplug the AC power to prevent any electric shock before you proceed with 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 a separate collection.

CAUTION: Describes precautions that should be observed to prevent the 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 qualified personnel only. No user-serviceable parts inside.

• Fuse
  To prevent a fire, make sure to use fuses with specified standards (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 protective grounding wire or disconnect the wiring of the protective grounding terminal.

• Operating Conditions
  This apparatus shall not be exposed to dripping or splashing and 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 manufacturer’s instructions. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) 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 specified 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 is provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for the replacement of the obsolete outlet.
  Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.

• Cleaning When the apparatus needs cleaning, you can blow off the dust from the apparatus with a blower or clean it with a 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 a 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 disconnect device, the disconnect device shall remain readily operable.

INTRODUCTION

The AH 150.8 switching power professional Amplifier is designed for professional use on stage. The high-quality components and the carefully designed circuits ensure excellent audio performance and extremely linear frequency response. In fact, the switching technology offers, together with increased efficiency and 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 trouble-free use even in the most demanding conditions. We believe the AH 150.8 will provide a perfect performance, what you get is an unprecedented performance at an incredibly attractive price.

Features:
High current switching power allows high power output with low noise and low distortion
Substantial protection circuitry like a thermal, short circuit, power on/off muting and therefore protection
Built-in limiter
Euroblock input and output
Gain controls for easy access
Signal, Clip protection, 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 strong. it is time to reduce the input level until the clip LED turns off. g3)
3. SIGNAL LED These green LEDs light up when the respective channel’s output signal passes 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 output. The speaker system is actually disconnected from the amplifier outputs when this LED is red, the temperature must be reduced by good ventilation and the signal level decreased etc, if the problem is resolved. the protection output systems will deactivate automatically, and normal amplifier operation is resumed.

REAR PANEL

1. Power Switch It switches ON/OFF the unit’s main power.
2. AC Input Use it to connect your AH 150.8 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.
6. Operation mode Switch Select the operation mode (70Vor I OOV) on each channel moving the dip-switches to the desired position.

Exhaust Vents
Air is drawn from the front grilles, flowing 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
This is a connection example. Thanks to it 8-channel design, it is possible to separate 8 zones with different audio sources or to use the same audio on all zones.

TECHNICAL SPECIFICATIONS

| AH 150.8
---|---
Output Power (100V line)| one channel drive| !sow
all channel drive| 135W’8
Output Power (70V line)| one channel drive| !sow
all channel drive| 13SW°8
Input sensitivity| 0.9-1.IV (0+1-1dBV)
Input Impedance| 201to (balanced) 10k0 (unbalanced)
Frequency response| 100 Hz – IS kHz
Voltage gain (100V)| 40 dB
THD+ N| <0.1%
S/N rate| >95 dB
Crosstalk| >70dB
Damping factor| >200
Power output circuitry| Switching power. Class-D
Power supply| I I OV- I 20V or 220V-240V AC 50/60Hz
Protections| Short circuit, open circuit, thermal, ultrasonic, and RF
Connectors| INPUT & OUTPUT: Euroblock
Controls| Front: AC switch. Input level control for each channel Rear: 70V/100V selector
Indicators| SIGNAL: green LED CLIP: red LED POWER: green LED
PROTECTION: red LED PRIOR: green/red LED
Dimensions (WxHxD)| 483x44x360 (mm)
Weight| 7.0 kg

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