DIGISYNTHETIC DP4800, DP2240, DP1800, DP3200, DP1400 User Manual

USER MANUAL

POWER

EXCELLENT POWER AMPLIFIER

DIGISYNTHETIC

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DP4800
DP3200
DP2240
DP1800
DP1400

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SIGNAL

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Channel A Channel B

DP Series

Power Amplifier

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DP 4800

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DP 3200

WARNING

When using electric products, basic precautions should always be followed:

1. Read all the SAFETY INSTRUCTIONS before using the product.

2. This product must be earthed. If it has malfunction or breaks down, grounding provides a path of
least resistance for electric current to reduce risk of electric shock.
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.

3. To reduce the risk of injury, close supervision is necessary when the product is used near children.

4. 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.

5. This product may be capable of producing sound levels that could cause permanent hearing loss.
Do not operate for a long period of time at high volume level or at a level that is uncomfortable. If you
experience any hearing loss or ringing in the ears, you should consult an audiologist.

6. This product should be located so that its location or position does not interfere with its proper
ventilation.

7. This product should be located away from heat sources such as radiators, heat registers or other
products that produce heat.

8. The product should be connected to a power supply only of the type described on the operating
instructions or as marked on the product.

9. This product may be equipped with a polarized line plug (one blade wider than the other). This is a
safety feature. If you are unable to insert the plug into the outlet, contact an electrician to replace your
obsolete outlet. Do not defeat the safety purpose of the plug.

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
openings

12. The product should be serviced by qualified service personnel when:
A. The power-supply cord or the plug has been damaged;
B. Objects have fallen, or liquid has been spilled into the product;
C. The product has been exposed to rain;
D. The product does not appear to operate normally or exhibits a marked change in performance;
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.

IMPORTANT SAFETY INSTRUCTION

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Installation & operating instruction

Mains power connection.

Before connecting the amplifier to the mains power socket, make certain that the voltage corresponds
with that indicated on the rear of the unit (an allowance of ¡À 10% is acceptable).

Before connecting the power cable to the mains, always make certain that it is not damaged
and that there are no bare wires, always connect the power cable to the amplifier before
switching it on and only remove the cable after switching it off.

Switching on and off.
In an audio system, it's always better to switch power amplifiers on last and off first.
Remember to switch off the amplifier before connecting it to or disconnecting it from other units
and to switch always on first the mixer and then the amplifier: in this manner, peaks which are
annoying and sometimes dangerous particularly for the loudspeakers enclosures are avoided.
It is normal for the LEDs to light up for a few moments when switching on.

Handling.
Do not force knobs and connectors, as they could be damaged if treated with excessive
force.

Connections and prevention of possible interference.
Avoid installing your equipment near radios, televisions, etc., since they could cause noisy
disturbance. When connecting the other units in your sound system, watch out for to so-called
earth-loops, which can cause hum: in the event of interference, try using the EARTH switch on
the amplifier's rear panel.

Connector cables.
To connect the amplifier to the mixer, always make certain to use only signal cables
(screened cables made up of two wires plus a braid screen), not power cables (speaker
cables, normally made up of two wires, usually with a greater cross-section): to connect the
amplifier to the loudspeaker enclosures, always use power cables, not signal cables, as in the
latter case in fact, the power from the amplifiers would be partially disperse because of the
cable's smaller cross-section.
Take care of the connector cables. Always hold them by the connectors, avoiding pulling the
wire and avoid knots and twists when coiling them: this gives the advantage of increasing their
life and reliability.

Air circulation for cooling.
Amplifier's correct cooling is ensured by an internal fan, the speed of which is controlled by a
special sensor (the speed is proportional to output power and therefore the temperature
generated):remember never to block the air vents located on the unit's sides in any way: the air
necessary for cooling passes through these.
If the amplifier is kept in a flight-case during use, make certain that it has sufficient openings at
both the amplifier's air vents. Avoid locating it very small spaces which don't allow correct air
circulation.

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