DIGISYNTHETIC DSD1800 User manual

DSD Series Professional Power Amplifier
DSD800/DSD1800/DSD3200/DSD4000
Owner's Manual
PRO Digital Pow e r Am plifie r DSD4000

1
IMPORTANT SAFETY INSTRUCTIONS
Please read the basic protective measure as below before using.
1. Please read all the safety instruction before using the product.
2. This product must be earthed. If it should be malfunction or
break down, grounding provides a path of least resistance for
electric current to reduce risk of electric shock.
3. This product is equipped with a cord having an
equipment-grounding conductor and a grounding plug. The plug
must be plugged into an appropriate outlet that is properly
installed and earthed in accordance with all local codes and
ordinance.
DANGER - Improper connection of the equipment-grounding
conductor can result in a risk of electric shock. Check with a
qualified electrician or serviceman if you are in doubt as to
whether the product is properly grounded. Do not modify the
plug provided with the product - if it will not fit the outlet; have a
proper outlet installed by a qualified electrician.
4. To reduce the risk of injury, close supervision is necessary when
the product is used near children.
5. Do not use this product near water-for example, near a bathtub,
washbowl, kitchen sink, in wet basement or near a swimming
pool or the lake.
6. Whether used this product alone or connected to the power
amplifier, speaker or headset, excessive volume may cause
permanent hearing loss. Don't use for a long time in large or any
volume may cause discomfort. If you feel any hearing loss or
tinnitus, Please seek medical advice.
7. This product should be located so that its location or position
does not interfere with its proper ventilation.
8. This product should be located away from heat sources such as
radiators, heat registers or other products that produce heat.
9. The product should be connected to a power supply only of the
type described on the operation instructions or as marked on the
product.
10. The power-supply cord of the product should be unplugged from
the outlet when left unused for a long period of time.
When unplugging the power-supply cord, do not pull on the cord,
but grasp it by the plug.
11. Care should be taken so that object do not fall and liquid are not
spilled into the enclosure through opening.
12. The product should be serviced by qualified service personnel
when:
a) The power-supply cord or the plug has been damaged; or
b) Objects have been fallen, or liquid has been spilled into the
product; or
c) The product has been exposed to rain; or
d) The product does not appear to operate normally or
exhibits a marked change in performance; or
e) The product has been dropped or the enclosure damaged.
13. Do not attempt to service the product beyond that described in
the user-maintenance instructions.
All other servicing should be referred to qualified service
personnel.
WARNING - Do not place objects on the product's power cord or
place it in a position where anyone could trip over, walk on or
roll anything over it. Do not allow the product to rest on or to be
installed over power cords of any type. Improper installations of
this type create the possibility of fire hazard and/or personal
injury.
14. The power-supply cord should be unplugged from the outlet
when the product is completely power off from the electric
power sources and electric networks.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC
SHOCK, DO NOT REMOVE COVER (OR BACK). NO
USER-SERVICEABLE PARTS INSIDE. REFER
SERVICING TO QUALIFIED SERVICE PERSONNEL.
The lightning flash with arrowhead symbol
within an equilateral triangle is intended to
alert the user to the presence of uninsulated
dangerous voltage within the product's
enclosure that may be of sufficient magnitude
to constitute a risk of electric shock to persons.
The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the product.
Only use it below the attitude of 2000ms for
safty application.
Only use it in nontropical climate condition for
safty application.
≤2000m

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Introduction
Thank you for your purchase of the Series Power Amplifier. These series amplifiers fully incorporate renowned
technological expertise, and offer high reliability, rock-solid stability, and superb acoustic characteristics — all in a trim,
1U-sized package.
Features
Applies the classical PWM circuit design and new technology protection circuit.
Applies excellent power-supply design, reliable circuit, high efficiency and low distortion.
New modulation mode helps to taking sample of extremely small signal, to improve and perfect the method of
sampling.
High switch mode frequency, precise controlling of dead-time makes the distortion of the amplifier much lower, the
sound quality reaches and even passes the traditional transformer amplifier.
It has high reliability and applicability, big dynamic range, small size, lightweight, high efficiency, low distortion, big
output power, etc.
1. Front Panel Controls and functions
①Channel A Volume Control Knob
②ChannelAlevelindicator
③Channel B level indicator
④Channel B Volume Control Knob
⑤Power Switch
2. Rear Panel Controls and functions
①Mains input connector
②Channel B signal link connector
③Channel B signal input connector
④Channel A signal link connector
⑤Channel A signal input connector
⑥Cooling fan outlet
⑦Channel B output connector
⑧Cooling fan outlet
⑨Channel A output connector

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3. Systems Connections
4. Operation Instructions
Starting steps:
1. Setting and connect the wire correctly.
2. Check the output and the input wire, to ensure that no
short-circuit
3. Check out if local mains voltage and frequency is matching with
the product.
4. Make sure the Power Switch is the OFF position. Turn down the
volume to the minimum.
5. Connect the power supply, sequentially turn on the audio source
device, switch on the amplifier power and clockwise turn the
volume knob to the appropriate position.
Shut down steps:
1. Turn the Volume Control Knobs counterclockwise to the
minimum.
2. Power off.
Troubleshooting:
Issues Possible cause
All the wires are
connected, but no sound
output
①No power or socket connection is
bad.
②Burn out a fuse.
③Volume is not turned on
④No input signal
Boot correctly, there is
alarm when use.
①Short-circuit load or damaged
②Supply voltage is not stable, too
low or too high.
③Heavy load
No sound output when in
normal use.
①The temperature is too high, the
device is under protection.
②Poor electrical connection

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5. General Specifications
Model DSD800 DSD1800 DSD3200 DSD4000
Number of channels 2 2 2 2
Output Power ( All Channels driven output power, THD=1%)
8ΩStereo 200W×2 450W×2 700W×2 1000W×2
4ΩStereo 300W×2 700W×2 1300W×2 1700W×2
2ΩStereo 400W×2 900W×2 1600W×2 2000W×2
Frequency Response 20Hz-20kHz, ±0.3dB (@8Ω)
Slew Rate 50V/us
THD+N < 0.3%
IMD-SMPTE < 0.3%
SNR > 105dB
Crosstalk < 75dB
Damping Factor > 800 (8Ω,20Hz-200Hz)
Sensitivity 1V
Input Impedance 20kΩ(Balance), 10kΩ(Unbalance)
Voltage Gain 32dB 36dB 40dB 41dB
Efficiency > 85%
Cooling Forced air cooling, air flow from the front to the rear.
Height 1U
Product Dimensions 483×375×45 (W×D×H, mm)
Packing Dimensions 530×530×90 (W×D×H, mm)
Net Weight 5.6 kg 7.0 kg 8.0 kg 8.0 kg
Gross Weight 7.2 kg 8.6 kg 9.6 kg 9.6 kg