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Specifications subject to change. | ©2021 Procella Audio Svenska AB, Procella Audio USA, LLC. All rights reserved. | V1.0 2021/08              3

Statutory and Safety Notices

Important Safety Instructions

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.

  Do not submerge the equipment in water or liquids. 

7.

    Do not use any aerosol spray, cleaner, disinfectant or fumigant 

on, near or into the equipment. 

8.

  Clean only with a dry cloth.

9.

    Do not block any ventilation opening. Install in accordance 

with the manufacturer’s instructions.

10.

   Do not install near any heat sources such as radiators, heat 

registers, stoves, or other apparatus (including amplifier) that 
produce heat.

11.

   To reduce the risk of electrical shock, the power cord shall be 

connected to a mains socket outlet with a protective earthing 
connection.

12.

   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 are provided for your safety. If the provided 
plug does not fit into your outlet, consult an electrician for 
replacement of the obsolete outlet.

13.

   Protect the power cord from being walked on or pinched 

particularly at plugs, convenience receptacles, and the point 
where they exit from the apparatus.

14.

   Do not unplug the unit by pulling on the cord, use the plug.

15.

   Only use attachments/accessories specified by the 

manufacturer.

16.

   Unplug this apparatus during lightning storms or when 

unused for long periods of time.

17.

   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.

18.

   The appliance coupler, or the AC Mains plug, is the AC mains 

disconnect device and shall remain readily accessible after 
installation. 

19.

  Adhere to all applicable, local codes.

20.

   Consult a licensed, professional engineer when any doubt or 

questions arise regarding a physical equipment installation.

Environmental Statement

This product complies with international directives, 
including but not limited to the Restriction of 
Hazardous Substances (RoHS) in electrical and 
electronic equipment, the Registration, Evaluation, 
Authorization and restriction of Chemicals (REACH) 
and the disposal of Waste Electrical and Electronic 

Equipment (WEEE). Consult your local waste disposal authority for 
guidance on how properly to recycle or dispose of this product.

Summary of Contents for DA4280

Page 1: ...ecifications subject to change 2021 Procella Audio Svenska AB Procella Audio USA LLC All rights reserved V1 0 2021 08 1 DA4280 Power Amplifier www procella audio contact procella audio User Manual V1...

Page 2: ...y damage to or unsatisfactory performance from the Procella DA4280 amplifier caused by inadequate or failed input or output ancillaries may may invalidate support warranty or guarantees of performance...

Page 3: ...et 13 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus 14 Do not unplug the unit by pulling on the...

Page 4: ...the front panel Signal input and output connections are accomplished via Euro Block connectors and operational configurations are set up through a DIP switch module located on the amplifier rear panel...

Page 5: ...for channels in Hi Z mode SWITCH 6 Input ganging 1 All Input ganging 1 1 SWITCH 7 GPIO standby polarity NO Normally Open GPIO standby polarity NC Normally Closed SWITCH 8 Front panel control locked Fr...

Page 6: ...1 Ventilation airflow space of at least 25 mm 1 in should be maintained along at least one side of the amplifier at all times Ventilation apertures are also located on the rear panel of the amplifier...

Page 7: ...t the installation positive amplifier terminals should always be connected to positive speaker terminals and negative amplifier terminals always connected to negative speaker terminals No bridge mode...

Page 8: ...Low Z connection illustrated Note DIP switch options must be set appropriately Diagram 4b Cable connections to the output connector Diagram 4d Cable connections to the GPIO connector The exclamation...

Page 9: ...r amplifier fault Standby indicator Gain adjust and signal indicator Channel 4 Gain adjust and signal indicator Channel 3 Gain adjust and signal indicator Channel 2 Gain adjust and signal indicator Ch...

Page 10: ...odulator with ultra low distortion Output Voltage 140 Vp 280 Vpp unloaded Max Output current 25A peak Signal To Noise Ratio 100 dB A weighted 20 Hz 20 kHz 8 load THD N typical 0 05 20 Hz 20 kHz 8 load...

Page 11: ...ice center with all transportation and insurance charges prepaid All warranties of whatever character are void and unenforceable if the component or any part thereof is not purchased from an authorize...

Page 12: ...Specifications subject to change 2021 Procella Audio Svenska AB Procella Audio USA LLC All rights reserved V1 0 2021 08 12...

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