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PRELIMINAR

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3

E

Safety

rules

This device must be powered exclusively by earth connected mains sockets in electrical networks compliant to the IEC
364 or similar rules.
Is absolutely necessary to verify this fundamental requirement of safety and, in case of doubt, require an accurate
check by a qualified personnel.
The constructor cannot be considered responsible for eventual damages caused to persons, things or data for the
missing of accurate earth link.

Before powering this device verify that the amplifier is supplied with the correct voltage rating.
Verify that your mains connection is capable to satisfy the power ratings of the device.
Do not spill water or other liquids into or on the unit.
Do not use this unit if the electrical power cord is frayed or broken.
Do not remove the cover. Removing the cover will expose you to potentially dangerous voltage.
No naked flame sources such like lighted candles should be placed on the amplifier

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Provide sectioning breaker between mains connections and apparatus. Suggested device is 10A/250Vac
(230Vac mains voltage) or 16A/250Vac (110Vac mains voltage), C or D curve, 10KA.

Speaker damage

The DIGAM series amplifiers are among the most powerful professional amplifiers available and are capable of
producing much more power than many loudspeakers can handle. It is the user's responsibility to use suitable
speakers with the amplifier and to use them in a sensible way that will not cause damage.
Powersoft will not be responsible for damaged speakers. Consult the speaker manufacturer for power-handling
recommendations.
Even if you reduce the gain using the amplifier's front panel attenuation controls, it is still possible to reach full output
power if the input signal level is high enough.
A single high-power crescendo can damage high-frequency drivers almost instantaneously, while low-frequency
drivers can usually withstand very high, continuous power levels for a few seconds before they fail. Reduce power
immediately if you hear any speaker "bottoming out" - harsh pops or cracking distortion that indicate that the speaker
voice coil or diaphragm is striking the magnet assembly.
Powersoft recommends that you use amplifiers of this power range for more headroom (cleaner sound) rather than for
increased volume.

Speaker output shock hazard

A DIGAM amplifier is capable of producing hazardous output voltages. To avoid electrical shock, do not touch any
exposed speaker wiring while the amplifier is operating.

This manual contains important information on operating your DIGAM amplifier correctly
and safely. Please read it carefully before operating your amplifier. If you have any
questions, contact your Powersoft dealer.

Summary of Contents for L SERIES

Page 1: ...L E Digital Audio Amplifier for Professional Applications User Manual V 1 1 27 4 2005...

Page 2: ......

Page 3: ...1 E P R E L I M I N A R Y Table of contents This page left intentionally blank...

Page 4: ...s regarding installation WARNING Install the amplifier in a well ventilated location where it will not be exposed to high temperature or humidity Do not install the amplifier in a location that is exp...

Page 5: ...are capable of producing much more power than many loudspeakers can handle It is the user s responsibility to use suitable speakers with the amplifier and to use them in a sensible way that will not c...

Page 6: ...ce standard music has an average power density of 40 of the maximum level conventional amplifiers can easily generate 10 times more heat than DIGAM for the same volume of sound Crystal clear highs and...

Page 7: ...pletely tested and inspected before leaving the factory and should arrive in perfect condition If you find any damage notify the shipping company immediately Be sure to save the carton and all packing...

Page 8: ...ard 19 rack Four front panel mounting holes are provided Your DIGAM amplifier uses a forced air cooling system to maintain a low even operating temperature Drawn by an internal fan air enters through...

Page 9: ...ton then reset the cover and plug the mains cable figure 1 5 1 1 6 Building and setting DSP module s Warning before removing the cover turn off the power switch and unplug the mains cable The Digam L...

Page 10: ...below first open the fingers then rotate the module in the vertical position and extract it figure 1 6 6 figure 1 6 7 8 note if you mount 2 DSP module you must connect the J6 contact and J7 contact a...

Page 11: ...4 ON 1 ON 2 3 4 ON 1 ON 2 3 4 ON 1 SW103 ON 2 3 4 ON 1 ON 2 3 4 ON 1 CH3 4 CH1 2 LQ ONLY SET SW102 AS NEEDED FOR DSP INSTALLED OR NOT SW302 SW103 ON 2 3 4 ON 1 5 6 7 8 CN303 CN403 AS SPARE OUTPUTS CH...

Page 12: ...o other amps IN IN GND Balanced input IN SHIELD Unbalanced input figure 1 7 2 IN IN GND In the LD model two channels the input connections are in the right side of the panel the remaining input connec...

Page 13: ...polarity mode By having channel A and B operating in opposite polarity the energy storage in the power supply is more efficient This is significant for signals below 100Hz sub bass etc and improves t...

Page 14: ...ple of channels The clip LED when lighting indicates the clipping state for the output stage of the correspondig channel The signal 18dB and 6dB LEDs operate as V meter and the signal LED is lighted w...

Page 15: ...tomatically unmute but the LED will be unlighted at 75 C It will be possible to reduce the temperature reducing the output power 3 4 DC fault protection If DC or excessive subsonic energy appears at a...

Page 16: ...ronment the front side filters clog with dust after prolonged use this will interfere with cooling You may use compressed air to remove the dust from filters To remove air filters see fig 4 3 1 unscre...

Page 17: ...our amplifier is defective check your system configuration and amplifier settings to determine the origin of the problem In many cases incorrect audio interfacing poor cabling or other system level im...

Page 18: ...DGMCONTROL DIFFERENTIAL AMPLIFIER OUTPUT SIGNAL LFRONT VOLUME CONTROL DISPLAY DGMDSPA OPTIONAL DSP BOARD DGMCONTROL LIMITER CIRCUIT DGMCONTROL ERROR AMPLIFIER DGMCONTROL CLOCK GENERATOR AND DIVIDER DG...

Page 19: ...1 1 2 2 bridge Power Watts EIAJ per channel Single ch all ch s driven LED bars indicators Over temperature forecasting Thermal protection Short circuit protection Over load output protection Temperat...

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