Question about Acoustic A-5640 Computer Speakers

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Accent acoustics no power with transformer

I've lost the original power source transformer to my accent acoustics speakers, but see this unit (of 2 speakers and one subwoofer) is run by a 9v transformer. I have several 9v adapters in my "electronics box" and have tried them. However, none of them will bring power to the woofer and speakers. What do you think is the problem. Is it internal in the unit itself, or does it have to do with an improper transformer. Thanks for your help. Kathy Trawick

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I have the same problem at the moment. I cannot find my power cord either.
One thing I noticed is that the polarity of this connection is opposite of all of my other 9V power adapters. The 'pole' is negative on this speaker set. That means that the inside of the plug (the hole) has to be the negative. See if that might be your problem. Finding an adapter with the correct polarity and amperage is key. I am trying to figure out the amperage by searching the web.

Posted on Nov 07, 2008

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I have a boston acoustics speaker ba635 i have lost the power cord how can i get another one


try universal power plug sold at any CVS or Wallgreen start from lowest voltage and go up till it works make sure the plug matches and polarity

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POWER SUPPLY


Hi, the mA rating for this power adapter is 1500 mA !! I'm gonna give you all the specs. you need to order a new one, and I'm gonna tell you where you can order a new one at; at your preference ?

POWER SUPPLY/POWER ADAPTER TRANSFORMER FOR:(WALL PLUG IN)
BOSTON ACOUSTICS MICROMEDIA SYSTEM 7000596
2.1 SURROUND (2 SATELLITES) (1 SUBWOOFER)
MODEL # WK1201A5-1 AN (THIS IS THE MODEL # FOR THE PLUG)
I/P(INPUT) 120 VAC 60 HZ / 23 VA
O/P(OUTPUT) 12 VAC 1500 Ma
This is all the info you need to order a brand new one in the box.
Go to www.emtcompany.com and in your search box punch in the model # wk1201a5-1an. they cost 29.99 new but its worth it for a great sound system. good luck and I hope I helped a bit

steve - if you have any further questions, i will be glad to help out, you can email me bostonrox129@yahoo.com

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1 Answer

Lots of problems please help!


  1. firstly you check the cable loose/break,
  2. check it by using multimeter
  3. dry soldering, loose contact
  4. resolder soldering points or reconnect cable
  5. your powersupply transformer coil may breaked now it become loose contact.
  6. you check the supply output voltage with and without load
  7. if low or no output voltage replace supply
  8. if you don't get the proper transformer rewind it
  9. also check power amplifier section short ckt

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