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IMPORTANT SAFETY INSTRUCTIONS 

 

WARNING: 

When using electric products, basic cautions should always be followed, including the following: 

1. Read all safety and operating instructions before using this product. 
2. All safety and operating instructions should be retained for future reference. 
3. Obey all cautions in the operating instructions and on the back of the unit. 
4. All operating instructions should be followed. 
5. This product should not be used near water, i.e., a bathtub, sink, swimming pool, wet basement, etc. 
6. This product should be located so that its position does not interfere with its proper ventilation. It should not be 
placed flat against a wall or placed in a built-in enclosure that will impede the flow of cooling air. 
7. This product should not be placed near a source of heat such as a stove, radiator, or another 

heat 

producing amplifier. 

8. Connect only to a power supply of the type marked on the unit adjacent to the power supply cord. 
9. Never break off the ground pin on the power supply cord. 
10. Power supply cords should always be handled carefully. Never walk or place equipment on power supply cords. 
Periodically check cords for cuts or signs of stress, especially at the plug and the point where the cord exits the unit. 
11. The power supply cord should be unplugged when the unit is to be unused for long periods of time. 
12. If this product is to be mounted in an equipment rack, rear support should be provided. 
13 Metal parts can be cleaned with a damp rag. The vinyl covering used on some units can be cleaned with a damp rag 
or an ammoniabased household cleaner if necessary. Disconnect unit from power supply before cleaning. 
14. Care should be taken so that objects do not fall and liquids are not spilled into the unit through the ventilation holes 
or any other openings. 
15. This unit should be checked by a qualified service technician if: 
       

a. The power supply cord or plug has been damaged. 

       

b. Anything has fallen or been spilled into the unit. 
c. The unit does not operate correctly. 
d. The unit has been dropped or the enclosure damaged. 

16. The user should not attempt to service this equipment. All service work should be done by a qualified service 
technician. 
17. Exposure to extremely high noise levels may cause a permanent hearing loss. Individuals vary considerably in 
susceptibility to noise induced hearing loss, but nearly everyone will lose some hearing if exposed to sufficiently 
intense noise for a sufficient time. The U.S. Government’s Occupational Safety and Health Administration (OSHA) has 
specified the following permissible noise levelexposures. 
 
Duration Per Day In Hours    

 

Sound Level dBA, Slow Response 

 

     90 

 

     92 

 

     95 

3      97 
2      100

 

l/2 

 

     102 

1      105 
l/2 

 

     110 

l/4 

or 

less 

 

     115 

 

According to OSHA, any exposure in excess of the above permissible limits could result in some hearing loss. 
Ear plugs or protectors in the ear canals or over the ears must be worn when operating this amplification system in 
order to prevent a permanent hearing loss if exposure is in excess of the limits as set forth above. To ensure against 
potentially dangerous exposure to high sound pressure levels, it is recommended that all persons exposed to equipment 
capable of producing high sound pressure levels such as this amplification system be protected by hearing protectors 
while this unit is in operation. 
 
 
 
 

SAVE THESE INSTRUCTIONS!

 

 

Summary of Contents for DSX POWERSTACK

Page 1: ...INET OPERATING GUIDE ULTRASOUND AMPLIFIERS 2150 Delavan Drive STE 11 WEST DES MOINES IA 50265 PHONE 515 282 1650 FAX 515 282 1680 www UltraSoundAmps com E MAIL Info UltraSoundAmps com CUSTOMER TECHNICAL SUPPORT E MAIL Support UltraSoundAmps com TOLL FREE 1 888 993 5091 ...

Page 2: ...H FILTER that is used to control resonant feedback Notch Filter ON OFF Enables or disables the notch filter control Shape ON OFF This toggle switch enables or disables the SHAPE control The shape control is a mid dip control In the on position the mid frequencies will be cut and the high and low frequencies will be boosted PHANTOM POWER An internal phantom power source 13 6 volts is provided for u...

Page 3: ...not change with the MASTER VOLUME setting This send can be used to feed a signal to a recording or sound reinforcement mixer Additionally this output can be used to drive a slave amp or powered extension speaker DIRECT OUT Balanced output signal used to feed recording or sound reinforcement equipment This signal is post eq and post efx but is pre MASTER VOLUME TAPE CD Unbalanced phono RCA input ja...

Page 4: ...an amplifier Using a shielded instrument cord can cause unwanted noise or oscillation which can harm the amplifier and speakers Shape On 5db 3kHZ 5db 1500HZ 5db 100HZ Notch Feedback Elimination Range 100 to 350HZ Attenuation 18db Line Out Impedance 10K Sig Level 300MV Nominal Output Power 50W RMS 25 Watts per side Total Harmonic Distortion 1 Signal to Noise Ratio 98db Speakers Two 8 special design...

Page 5: ... that also connect the audio signal to the electrical earth ground The resultant hum is directly related to the differences in current that flow in the respective electrical circuits which all share the same earth ground If the audio signal path is only connected to ground at a single point the differences in ground currents will not induce any interference from the power line so the sound system ...

Page 6: ...usehold cleaner if necessary Disconnect unit from power supply before cleaning 14 Care should be taken so that objects do not fall and liquids are not spilled into the unit through the ventilation holes or any other openings 15 This unit should be checked by a qualified service technician if a The power supply cord or plug has been damaged b Anything has fallen or been spilled into the unit c The ...

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