EMAR 0804 User manual
DIGITAL CLASS-D
FOUR CHANNEL AMPLIFIER
0804
INSTALLATION AND OPERATION MANUAL
Four Channel Class-D Power Amplifier
2/11
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
Four Channel Class-D Power Amplifier
3/11
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
Four Channel Class-D Power Amplifier
4/11
Front Page----‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐1
Important Safety Information------------------------------------------------------------------------------------------------------------2
Safety Warning------------------------------------------------------------------------------------------------------------------------------3
Contents-------------------------------------------------------------------------------------------------------------------------------------4
Introduction---------------------------------------------------------------------------------------------------------------------------------5
Front Panel----------------------------------------------------------------------------------------------------------------------------------6
Rear Panel-----------------------------------------------------------------------------------------------------------------------------------7
Speaker Connection------------------------------------------------------------------------------------------------------------------------8
Block Diagram-------------------------------------------------------------------------------------------------------------------------------9
Specification-------------------------------------------------------------------------------------------------------------------------------10
Service and Warranty---------------------------------------------------------------------------------------------------------------------11
Contents
Four Channel Class-D Power Amplifier
5/11
Features:
Switching power technology digital power amplifier
Class-D PA power amplifier of minimum power consumption
Less rack space and less heat generation
Four channel power amplifier into 19” rack mount unit
Rated power output at 120W to 240W by four channels
Four channel separate speaker outputs 8/100V
Balanced line inputs by phoenix connector for four channels
Each input with separate gain control.
Each four channel with high-cut filter.
Built-in auto standby feature to save power consumption
Separate four channel indicators for protection, clip, input and output
Complete short circuit, overload, high temp, clip and DC protection
Wide AC input from 110V to 230V & DC 24V battery input
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 &
240W by four channels, so it could be used as four zone multiple
sources public address system at minimum cost. The versatile
loudspeaker outputs of both high impedance 100V & low impedance
4ohms enable it meet both PA fixed installation and Hi-fi stereo
sound installation jobs.
There are four balanced inputs by phoenix connector for each
channel with gain control. Four separate zone speaker outputs both
by 100V & 8ohms. The built-in four channel separate 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 also
included for standby power use.
Introduction
1.
2.
3.
4.
5.
6.
F
r
PROT
Protection indi
line short circ
u
guidance ask
f
channels.
CLIP
Clip indicator
w
INPUT
Input indicato
r
four channels.
OUPUT
Output indicat
o
channels.
POWER
Power indicat
o
POWER SWI
T
Power switch
u
r
ont P
a
cator will light
u
it, speaker li
n
f
or repai
r
and I
w
ill light on in
r
will light on i
n
o
r will light on
i
o
r will be light
o
T
CH
u
sed to power
a
nel
on in orange
o
n
e open circui
t
t will light off
o
red once the i
n
n
green once t
h
i
n green once t
o
n in blue onc
e
on and power
o
nce the ampli
f
t
, amplifier ov
e
o
nce these fail
u
n
put or output
h
ere is any inp
here is output
s
e
the unit has
off the equip
m
6/11
f
ier comes into
e
rload and inn
u
res been repa
is too high.
Th
ut signal has
b
s
ignal has bee
n
been powered
m
ent.
F
o
protection sta
t
er working te
m
ired.
T
here ar
e
h
ere are four s
b
een detected.
n
passed.
T
her
e
whether by A
C
o
ur Chann
e
t
us. The prote
c
m
perature ove
e
four separate
eparate CLIP i
T
here are fou
r
e
are four sepa
C
or DC.
e
l Class-D
P
c
tion maybe r
e
r 55℃, this in
d
protection ind
ndicators for
e
r
separate inpu
rate output in
d
P
ower Amp
l
e
sulted from s
p
d
icator give vi
icators for eac
ach four chan
n
t indicators fo
r
d
icators for eac
l
ifier
p
eaker
sually
h four
n
els.
r
each
h four
Four Channel Class-D Power Amplifier
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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. DC24V Battery Input
This input is used for battery power supply, which will be automatically switch on once the AC power supply fails as backup use.
3. 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 four 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.
4. LINE INPUT
The line input support both balanced or unbalanced input, these input are supplied in phoenix connectors. There are four channel
separate line inputs which could be managed respectively.
5. 8SPEAKER OUTPUT
The speaker outputs shall be connected to low impedance 8loudspeakers, the negative end to the speaker negative end and the
positive end to the speaker positive end. There are four channel separate 8speaker 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 8Ωends, which may burn up the speaker or have heavy distortion.
6. GAIN CONTROL
The gain control is used to adjustment the input sensitivity from various inputs so as to have the best response.
7. HIGH PASS FILTER
The high pass filter function will be enabled or disabled by pre-set the four channel separate dipswitch. There are four channel separate
high pass filters which could be managed respectively.
8. AUTO-STANDBY
The Auto standby function will be enabled or disabled by pre-set the four 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 four 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.
Rear Panel
Four Channel Class-D Power Amplifier
8/11
- Connecting 4-16Speaker Systems
When connecting conventional 4-16speaker systems, connect the speaker’s positive (+) side to the terminal labeled 4-16. 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 4LOW IMPEDANCE SPEAKER CONNECTION FOR 8LOW IMPEDANCE SPEAKER CONNECTION
FOR 100V SPEAKER WITH TRANSFORMER CONNECTION WRONG SPEAKER CONNECTION
Speaker Connection
Four Channel Class-D Power Amplifier
9/11
Block Diagram
Four Channel Class-D Power Amplifier
10/11
Model 0804 0804 0804 0804 0804
Description Class-D Four Channel Power Amplifier
Rated Power Output 4x60W 4x120W 4x240W 4x350W 4x500W
Speaker Output 8& 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 four channels
Input Impedance 10K
THD <0.1% (1KHz/-3dBv, 100W)
S/N Ratio >80dB
Crosstalk >60dB, 1KHz, Max output
Power Consumption 500W 600W 1200W 1750W 2300W
Power Supply Wide AC input from 110V & 230V, 50-60Hz, DC24V battery input included
Dimension 482(W)x420(D)x44(H) mm
Weight 8kg 8.5kg 9kg 9.5kg 15kg
Warranty 3 years warranty and free spare parts
Specifications
Four Channel Class-D Power Amplifier
11/11
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. Term s an d
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.
Service & Warranty
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