SHOW AH 1000.2 Switching Power Professional Amplifier User Manual

SHOW AH 1000.2 Switching Power Professional Amplifier

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 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 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 readymade 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 protective 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 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 are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for 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 a cleaning, you can blow off dust from the apparatus with

INTRODUCTION

The AH1000.2/AH1500.2 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 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 AH1000.2/AH1500.2 will provide a perfect performance, what you get is unprecedented 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 on/off muting and Therefore protection
• Built-in limiter
• Balanced XLR-TRS combo input jack &XLR/Link output
• Speak on output connectors
• front mounted gain controls for easy access
• Signal, Clip protect, and Power LED indicators to monitor performance.
• Stereo/Parallel/Bridged/Sub/70V/100V/Mute mode select.

CONTROL ELEMENTS

FRONT PANEL

① Power Switch
It switches ON/OFF the unit main power.
② Power Led
The Power LED lights up when the amplifier is powered on.
③ Level Control
These volume controls adjust the volume level.
④ Protection LED
In normal operation, the LED will not light up; If the LED lights red, it means the unit stay
in protection without sound output.
⑤ Signal LED
These green LEDs light up when the respective channel’s output signal pass through.
⑥ Clip LED
The red LED lights up when the input signal is too la rge, and when the input signal
decreases the LED will turn off.
⑦ Bridged LED
The Bridged LED lights up when the amplifier stay Bridged M
⑧ Air Intake Vents
AH1000.2/AH1500.2 employ a variable speed internal cooling fan to intake the air through front grill to keep it running cool even under extreme operating conditions. Please keep these vents clear and free from obstruction at all times to insure proper cooling.

REAR PANEL

① Channel A Link out
② Channel A XLR/TRS Input
This XLR/TRS jack will accept any balanced or unbalanced low impedance line level source by means of a three-pin XLR/TRS plug. The wiring for the plug is as follows: Pin1(Sleeve)=Ground, Pin2(TIP) =Signal+, Pin3(Ring)=Signal-.
③ Channel B TRS/XLR Input
This XLR/TRS jack will accept any balanced or unbalanced low impedance line level source by means of a three-pin XLR/TRS plug. The wiring for the plug is as follows: Pin1(Sleeve)=Ground, Pin2(TIP) =Signal+, Pin3(Ring)=Signal-.
④ Channel B Link out
⑤ SUB-X-OVER FREQ
Cut off frequency selectors for low-pass (SUB) filters, The value can be set from 50Hz to 250Hz.
X-OVER FREQ is available in Mode 4(SUB-Stereo) and Mode 5(SUB Bridged) only.
⑥ MODE
Mode 1: CHA/CHB stereo
Input and output channels are independent.
Mode 2:CHA/CHB parallel
Outputs are the same with any channel input.
Mode 3: CHA/CHB Brided
Input the signal to channel A, connect the speaker’s”+” to the output A+, connect speaker’s’-‘ to the output B+.
Mode 4: CHA/CHB sub-Stereo
ChA and CHB are stereo, output signd is low frequency, X-over FREQ CHA/CHB is available.
Mode 5:CHA/CHB sub-Bridged
CHA/CHB are Bridged, input the signal to CH1,output signal is Bridged, X-OVER FREQ CH1 is available.
Mode 6:70V-Stereo
CHA and CHB are stereo 70V line output, the min load is 4 .
Mode 7:100V-Bridged
CHA and CHB are Bridged, inprot the signal to CH1,output signal is 100V Bridged, the min load is 4 .
Mode 8:NC
Not used
Mode 9:Mute
The amplifier will be muted by turning on the swith .

Preset

| Mode
---|---
1| 2| 3| 4|

OFF

| OFF| OFF| OFF| STEREO
ON| OFF| OFF| OFF|

PARALLEL

OFF

| ON| OFF| OFF| BRIDGED
ON| ON| OFF| OFF|

SUB-STEREO

OFF

| OFF| ON| OFF| SUB-BRIDGED
ON| OFF| ON| OFF|

70V-STEREO

OFF

| ON| ON| OFF| 100V-BRIDGED

ON

| ON| ON| OFF| NC
| | | ON|

Mute

⑦ CHA SPEAKON NL-4R
Connect the amplifier to you speaker with these speaker jacks.
⑧ CHB SPEAKON NL-4R
Connect the amplifier to you speaker with these speaker jacks.
⑨ AC Input
Use it to connect your AH1000.2/AH1500.2 to the supplied AC cord.

APPLICATIONS

Stereo Operation

AH1000.2/AH1500.2 can be used in the stereo mode as two separate 1000/1500 watt units, each capable of driving loads down to 4 ohms. Each channel operates independently and has its own input connectors, sensitivity level controls, signal indicator LEDs, automatic limiter, fault protection circuitry, power amp, and speaker outputs. In the stereo mode, the signal smart switch must be set to the stereo position. One application of the stereo mode uses one channel of the amplifier for the left house speakers and the other channel for the right. The mixing board channels can be panned left or right according to the position of the instruments on the stage. This approach provides a more accurate reproduction of the live performance.

SWITCH SET TO STEREO

Mono Bridge Operation

The two internal power amplifiers(CHA and CHB) can be bridged together to form a single , higher powered amp. This is especially useful when using the amplifier to power a subwoofer. In the mon o mode, the amplifier uses the channel 1 input jacks and sensitivity control(channel 2’s are disabled). When operation in this mode, each channel is independently protected. The signal smart switch must be set to the bridge position and the minimum speaker load impedance must be 4 ohms.

SWITCH SET TO BRIDGE

70V-Stereo Operation

100V-Bridged Operation

WIRING CONNECTIONS

BLOCK DIAGRAM

TECHNICAL SPECIFICATIONS

or 10k Ohms unbalanced
Frequency Response (at 10dB Rated Output Power 8 )| 20Hz ~ 20KHz(+0/-1dB)| 20Hz ~ 20KHz(+0/-1dB)
Voltage Gain| 37+/-0.5dB| 38+/-0.5dB
THD+N (Ref.1K 1/8 Rated Power, A-Weighted)| <0.1%| <0.1%
S/N rate (Ref. Rated Power, A-Weighted)| >100dB| >100dB
Crosstalk (Below Rated Power)| >70dB| >70dB
Damping Factor(1K 8 ohms)| >200| >200
Power/Output Circuitry| Switching Power Class D| 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| Front: AC switch, Input level control for each channel Rear: Mode selector, Cut off frequency selectors
Indicators| SIGNAL: 2 green LED CLIP: 2 red LED POWER: 1 Green LED

PROTECTION: red LED Bridged:1 red LED

Connectors| INPUT : Neutrik combo XLR/TRS OUTPUT: Speak-on jacks
Power Supply| 110V-120V or 220V-240V AC 50/60 Hz 10%
Dimensions(mm)| 483(W)360(D)44(H)
Weight| 5.7kg| 6.1kg

Customer Support

SEIKAKU TECHNICAL GROUP LIMITED
NO.I LANE 17, SEC.2, HAN SHI WEST ROAD, TAICHUNG 40151, TAIWAN
tel: 886-4-22313737 – fax: 886-4-22346757
www.show-pa.com
[email protected]

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