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7th April 2013, 11:23 PM
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#1 |
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diyAudio Member
Join Date: May 2011
Location: Quebec
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Tannoy TS12 has suddenly very low output
Hello everyone,
I need some help diagnosing a problem that occurred on a Tannoy TS-12 subwoofer. It's made with a 500W BASH plate amp. My sub was working good, then I had it turned off (unplugged) for one week. When I came back and replugged it, it has lost its sensitivity. With a good musical feed, it's only whispering, even at maximum gain. I wonder if there's any known issue that could lead to that result. As I'm not familiar with Class-D or SMPS, any help will be greatly appreciated. Regards, Martin.
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The Hx amplifier is awesone... see mine here: http://www.diyaudio.com/forums/solid...ml#post2796303 Last edited by canonnica; 7th April 2013 at 11:41 PM. |
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16th April 2013, 12:13 PM
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#3 |
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diyAudio Member
Join Date: May 2011
Location: Quebec
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The problem on mine seems to be from the power-supply module. I decided to replace the whole plate. I was lucky to find a used 500W O-Audio plate amp that has the exact same measurements and screw locations. It was a simple swap...
Good luck with yours, it's really a great sub. Martin.
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The Hx amplifier is awesone... see mine here: http://www.diyaudio.com/forums/solid...ml#post2796303 |
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16th April 2013, 03:20 PM
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#5 |
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diyAudio Member
Join Date: Jan 2005
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I think the size of plate amps are a standard and not unique to this brand. And even if the screw holes are not in the same place on the replacement amp, it doesent matter as the plate covers up the old screw holes in the box anyways.
The fault kinda sounds like the input stage gets damaged by things like the capacitively coupled currents from the mains input filter in things like the psu in a computer and pretty much every other smps that has the three prong mains input. What you can do is bypass the input module and send a signal straight into the poweramp board itself, assuming the amp is a separate board and the input and lowpass filter is a separate board. If its all on one big board it gets harder to find the poweramp input without a full schematic. This test however would verify if it is the input circuitry or the poweramp circuitry thats damaged.
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The point of life is to build atleast one audio amplifier before you die. 
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17th April 2013, 03:01 PM
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#8 |
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diyAudio Member
Join Date: Oct 2007
Location: Vienna / Austria
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Mine blows the fuse, obviously the power supply. Has some burned parts:
Schematic for Tannoy TS-10 (or TS8-TS12)? I´m not sure yet if attempting to fix the SMPS is feasible or exchanging it would make more sense.
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Regards, Georg |
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