Question about Monster Cable MPA3250SS 3-Channel Amplifier

1 Answer

Have a trio of Hafler 9505

Same issue :static on one channel then goes down for the count . All three work same way. Worked great for years, bought new.
Thx
George

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,512 Answers

Hi George

Not 100% sure about your exact problem you have asked about. . Is it that all three amps go down simultaneously, or has each amp failed in the same way over time? If all are presenting this problem together then I would suspect a preamp problem, pushing DC voltage to the power amps. If you could please confirm this.

Static sounds are generally created by a failing component, usually a transistor or capacitor going leaky and allowing incorrect DC voltages to pass and upset the operation of the circuit. In turn this is firing the protection circuit, causing the amp goes down for the count. These sorts of problems can some times be easy, and then other times difficult to find. Generally, the best approach to fault finding this sort of problem is with localised alternate heating(hair dryer) and rapid cooling with CRC Freeze Spray. It is the best way to find isolate intermittent parts failing in this manner. Then you know what to replace. If you are not familiar with board level repairs, this may be a job for a HiFi specialist service guy to fix for you. Let me know is you need further assistance. Cheers.





regards
Robotek

Posted on Oct 13, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Left channel static


I have seen dirty switches or pots cause constant static. I would get some contact cleaner and try spraying it into all switches and pots, and work them to clean the contacts. Also, check to see if there is static in a low-level output such as the one for a tape recorder.

Mar 29, 2014 | Marantz Amplifiers & Preamps

1 Answer

My Yamaha 3090 comes on and stays on for a long time, but at times will shut down and if I bang on the top of the panel or front it sometimes will turn back on. I bought mine in 1997 and has worked w


All it will be is a bad solder joint inside the unit. Very easy to fix with a soldering iron. If you are no good with a soldering iron this should be a quick and cheap repair.

Dec 05, 2011 | Yamaha DSP-A3090 7-Channel Amplifier

1 Answer

Erratic volume from new turntable thru used amp


Glad to hear you got things worked out

-Scott

Apr 03, 2010 | Technics Amplifiers & Preamps

1 Answer

I need an owners manual for hafler dh 500 amp does anyone have


Hi mjwicks51,

Got your manual here:

http://www.hafler.com/techsupport/pdf/DH-500_amp_man.pdf

Regards
R.K.

Oct 21, 2009 | Amplifiers & Preamps

2 Answers

Hafler 9505 amp, has noisy output in mono.


Hi Don,

When you bridge the outputs , do you connect only to the ( + ) speakers terminals for your output. This is what the manual says to do.

Let me know

Scott

Apr 07, 2009 | Monster Cable MPA3250SS 3-Channel...

1 Answer

Marshall Amp # 8040- Static and breadkown no sound


Take a can of air (like they use on PCs), blow out the gain potentiometer, then try to squirt some good quality contact cleaner into the control and see how it responds. MAKE SURE you use contact cleaner suitable for use on PLASTIC components - use the wrong product and it's good bye amp.

MAKE SURE the unit is unplugged when you work on it. While you're in there, look around for any discoloation indicating that there could be a bad connection somewhere. I am assuming your speakers aren't blown....:)

Mar 15, 2009 | Amplifiers & Preamps

1 Answer

How do I connect a Polkaudio powered subwoofer (psw 125)


Connect a set of stereo RCA cables from the 'Output 2' on the Hafler to the line imputs on the Sub.Turn on the '1+2' output switch on the Hafler and rock out!

Dec 16, 2008 | Marantz PM7200 2-Channel Amplifier

2 Answers

Gemsound EXA-3955 Right Channel Problem


you sure you didnt flip the bridge switch on the back? its the tiny little black switch under the bridge output plug, if you have it set to "bridged mode" any input sent into the right channel produces only a hum, only left channel input works.

Apr 04, 2008 | Amplifiers & Preamps

4 Answers

Hafler dh220 power amplifier left channel distorsion


Sounds like your Power FET's are gone. Take it to a shop that specializes in high end or vintage gear. ....good luck...Rob

Dec 21, 2007 | Amplifiers & Preamps

Not finding what you are looking for?
Monster Cable MPA3250SS 3-Channel Amplifier Logo

226 people viewed this question

Ask a Question

Usually answered in minutes!

Top Monster Cable Amplifiers & Preamps Experts

 Grubhead
Grubhead

Level 3 Expert

4584 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

The Knight
The Knight

Level 3 Expert

68229 Answers

Are you a Monster Cable Amplifier and Preamp Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...