PEAS DA-1120 User manual

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www.peas-pa.com
DIGITAL CLASS-D
SINGLE CHANNEL AMPLIFIER
DA-1120
DA-1240
DA-1350
DA-500
DA-1000
DA-1500
INSTALLATION AND OPERATION MANUAL

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1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce
heat.
9. 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 replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit
from the apparatus.
11. Only use attachments/accessories specified by the manufacturer.
12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used,
use caution when moving the cart/apparatus combination to avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualified service personnel. 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.
15. This appliance shall not be exposed to dripping or splashing water and that no object filled with liquid such as vases shall be placed
on the apparatus.
16. Plug this apparatus to the proper wall outlet and make the plug to be disconnected readily operable.
17. Main plug is used as disconnected device and it should remain readily operable during intended use. In order to disconnect the
apparatus from the mains completely, the mains plug should be disconnected from the mains socket outlet completely.
18. WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
19. An appliance with a protective earth terminal should be connected to a mains outlet with a protective earth connection.
Important Safety Information

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WARNING!
TO PREVENT FIRE OR SHOCK HAZARD, DO NOT USE THE PLUG WITH
AN EXTENSION CORD, RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES
CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE
THIS APPLIANCE TO RAIN OR MOISTURE.
TO PREVENT ELECTRICAL SHOC
K, MATCH WIDE BLADE PLUG TO WIDE SLOT, FULLY INSERT.
Safety Warning

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Front Page-------------------------------------------------------------------------------------------------------------------------------------------------1
Important Safety Information------------------------------------------------------------------------------------------------------------2
Safety Warning------------------------------------------------------------------------------------------------------------------------------
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Contents-------------------------------------------------------------------------------------------------------------------------------------4
Introduction---------------------------------------------------------------------------------------------------------------------------------5
Front Panel----------------------------------------------------------------------------------------------------------------------------------6
Rear Panel-----------------------------------------------------------------------------------------------------------------------------------7
Speaker Connection------------------------------------------------------------------------------------------------------------------------8
Specification------------------------------------------------------------------------------------------------------------------------------- 9
Service and Warranty---------------------------------------------------------------------------------------------------------------------10
Contents

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Features:
l Switching power technology digital power amplifier
l Class-D PA power amplifier of minimum power consumption
l Less rack space and less heat generation
l Single channel power amplifier into 19” rack mount unit
l Rated power output at 120W, 250W, 350W to 500W
l Separate speaker outputs 8Ω/100V
l Balanced XLR input by phoenix connector
l Each input with separate gain control.
l Each channel with high-cut filter
l Built-in auto standby feature to save power consumption
l Separate channel indicators for protection, clip, input and output
l Complete short circuit, overload, high temp, clip and DC protection
l Wide AC input from 110V to 230V input
l DC 24V battery input already included
Description:
The digital class-D power amplifier is of switching power
technology, which features of minimum power consumption and
much higher efficiency up to 85%, moreover it helps to save
installation rack space, generate less heat so as to extend its
performance life span as a result.
The digital class-D amplifiers are of rated power output at 120W,
250W, 350W & 500W, so it could be used as digital public address
system at minimum cost. The versatile loudspeaker outputs of
both high impedance 100V & low impedance 8ohms enable it
meet both PA fixed installation and Hi-fi stereo sound installation
jobs.
There is one balanced input by phoenix connector for each
channel with gain control. The zone speaker output both by 100V
&8ohms. The built-in high-pass filters could be enabled or
disabled through the dip switch pre-setting.
Automatic standby enable after no detection of signal input for
one minute, immediately wake up at sight of any input. Visual
working status indicators include protection, clip, input and
output for easy supervision. With complete short circuit, overload,
high temp, clip and DC protection.
Wide AC power supply from 115V to 230V, thus it support
worldwide sound system installation. DC24V battery input is
included.
Introduction

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1. PROT
Protection indicator will light on in orange once the amplifier comes into protection status. The protection maybe resulted from speaker
line short circuit, speaker line open circuit, amplifier overload and inner working temperature over 55
℃
, this indicator give visually
guidance ask for repair and It will light off once these failures been repaired. There are two separate protection indicators for each two
channels.
2. CLIP
Clip indicator will light on in red once the input or output is too high. There are two separate CLIP indicators for each two channels.
3. INPUT
Input indicator will light on in green once there is any input signal has been detected. There are two separate input indicators for each
two channels.
4. OUPUT
Output indicator will light on in green once there is output signal has been passed. There are two separate output indicators for each
two channels.
5. POWER
Power indicator will be light on in blue once the unit has been powered whether by AC or DC.
6. POWER SWITCH
Power switch used to power on and power off the equipment.
Front Panel
Front Panel

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1. AC POWER CORD
AC power cord for input from 110V to 230V, the power cord itself is auto-switching.
2. LINE INPUT
The line input support both balanced or unbalanced inputs from audio sources or mixer, these input are supplied in phoenix connectors.
There are two channel separate line inputs which could be managed respectively.
3. GAIN CONTROL
The gain control is used to adjustment the input sensitivity from various inputs so as to have the best response. There are two separate
gain control for each channel.
4. 24V DC Input
The 24V DC input is used to connect with battery for backup power supply in case of AC fails.
5. 100V SPEAKER OUTPUT
The speaker outputs shall be connected to 100V line loudspeakers, the negative end to the speaker negative end and the positive end
to the speaker positive end. There are two channel separate 100V speaker outputs which could be managed respectively. These speaker
output are supplied in phoenix connector.
Never mixed the negative end and the positive one, which may cause the short circuit protection.
Never connection the low impedance loudspeaker to these 100V ends, which may burn up the speaker or have heavy distortion.
6. 8ΩSPEAKER OUTPUT
The speaker outputs shall be connected to low impedance 8Ωloudspeakers, the negative end to the speaker negative end and the
positive end to the speaker positive end. There are two channel separate 4Ωspeaker outputs which could be managed respectively.
These speaker output are supplied in phoenix connector.
Never mixed the negative end and the positive one, which may cause the short circuit protection.
Never connection the 100V line loudspeaker to these 4Ωends, which may burn up the speaker or have heavy distortion.
7. HIGH PASS FILTER
The high pass filter function will be enabled or disabled by pre-set the two channel separate dipswitch. There are two channel separate
high pass filters which could be managed respectively.
8. AUTO-STANDBY
Rear Panel

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The Auto standby function will be enabled or disabled by pre-set the two channel separate dipswitch. The enabled auto-standby function
will automatically power come into standby once no input has been detected within 2 minutes. The amplifier will immediately wake up
once there is detection of input signal. There are two channel separate auto-standby dipswitch which could be managed respectively.
Before connecting speakers, disconnect the AC power cable. Note the proper connecting terminals as shown below. Make sure that the total
impedance is not less than the rated impedance indicated.
- Connecting 4-16ΩSpeaker Systems
When connecting conventional 4-16Ωspeaker systems, connect the speaker’s positive (+) side to the terminal labeled 4-16Ω. Connect the
speaker’s negative (-) side to the terminal labeled COM.
- Connecting High-Voltage Distributed Speaker Systems
When connecting a low-impedance (100V) speaker system in parallel, connect the speaker’s positive (+) side to the terminal labeled 100V.
Connect the speaker’s negative (-) side to the terminal labeled COM.
FOR 4ΩLOW IMPEDANCE SPEAKER CONNECTION FOR 8ΩLOW IMPEDANCE SPEAKER CONNECTION
FOR 100V SPEAKER WITH TRANSFORMER CONNECTIONWRONG SPEAKER CONNECTION
Speaker Connection

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Model
DA-1120
DA-1240
DA-1350
DA-500
DA-1000
DA-1500
Description
Single Channel Class-D Power Amplifier
Rated Power Output
120W
240W
350W
500W
1000W
1500W
Speaker Output
8Ω& 100V
Frequency Response
L/H Cut OFF 20Hz-20KHz (+1/-2dB)
L/H Cut ON 70Hz-10KHz (+1/-3dB)
Input
0.775V, 0dBu, balanced phoenix connector by two channels
Input Impedance
10KΩ
THD
<0.1% (1KHz/-3dBv, 100W)
S/N Ratio
>80dB
Crosstalk
>60dB, 1KHz, Max output
Power Consumption
180W
300W
420W
540W
660W
780W
Power Supply
Wide AC input from 110V to 230V, 50-60Hz& DC24V input
Dimension
482(W)x420(D)x44(H) mm
Weight
4.2kg
4.5kg
5.0kg
5.5KG
6.0KG
6.5KG
Warranty
3 years warranty and free spare parts
Specifications

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Service
Procedures
Ensure the problem is not related to operator error, or system devices that are external to this unit. Information provided in the
troubleshooting portion of this manual may help with this process. Once it is certain that the problem is related to the product contact your
warranty provider as described in the warranty section of this manual.
Schematic
A Schematic is available by contacting your warranty provider.
Parts List
A Parts List is available by contacting your warranty provider.
Variations and Options
Variations
Products supplied through legitimate sources are compatible with local AC power requirements.
Options
No optional items are available for this product.
Warranty
Warranty terms of global three years. While the term and warranty may vary by country and may not be the same for all products. Terms
and conditions of warranty for a given product may be determined first by locating the appropriate country which the product was purchased
in, then by locating the product type.
Specifications may change without pre-notice.
GUANGZHOU QS AUDIO CO., LTD
www.peas-pa.com
Service & Warranty