Hi!
I need some help with WONDOM 2x 250W Class D Audio Amplifier Board amplifier IC IRS2092 AA-AB32291 . I ordered my first amp from Audiophonics. It worked great and the sound was very good. I decided to buy one more to run them in bridge mode to get more power out of them. I ordered one more but this time from Ebay, Sure-hifi.
The one from Ebay runs very hot in stereo compared to the one ordered from Audiophonics. The capacitators CP7A and CP7B is well over 110 degrees celcius. It works and sounds great but runs very hot.
I use the exact same set up and the one from Audiophonics is around 60-70 degrees celcius on the same caps under the same conditions. The setup is. Torodial trandformer +-50V 5 A, rectifier AA-AB41122 and 6 ohms speakers.
Any one in this forum that guide me in the right direction?
Regards
Lars
I need some help with WONDOM 2x 250W Class D Audio Amplifier Board amplifier IC IRS2092 AA-AB32291 . I ordered my first amp from Audiophonics. It worked great and the sound was very good. I decided to buy one more to run them in bridge mode to get more power out of them. I ordered one more but this time from Ebay, Sure-hifi.
The one from Ebay runs very hot in stereo compared to the one ordered from Audiophonics. The capacitators CP7A and CP7B is well over 110 degrees celcius. It works and sounds great but runs very hot.
I use the exact same set up and the one from Audiophonics is around 60-70 degrees celcius on the same caps under the same conditions. The setup is. Torodial trandformer +-50V 5 A, rectifier AA-AB41122 and 6 ohms speakers.
Any one in this forum that guide me in the right direction?
Regards
Lars
Attachments
Hi Lars,
I'm not sure if I can be of help, as I run the 200A mono version with the IRS2092.
But my board also has the blue calibration pot of which your amps have two.
Playing with the setting on mine did not affect the sound, but did have an effect on how hot things got.
You could check if the amp that runs cool has the same settings as the one that has boiling hot caps.
You don't mention if both amps have their own powersupply and rectifier board, I assume this is the case.
Check if both combo's put out the same Voltage to their respective amp.
Switch them and see if it makes a difference.
Based on the overheating caps, I suspect a malfunction in the output stage.
Did you contact the seller?
Regards, Jan.
I'm not sure if I can be of help, as I run the 200A mono version with the IRS2092.
But my board also has the blue calibration pot of which your amps have two.
Playing with the setting on mine did not affect the sound, but did have an effect on how hot things got.
You could check if the amp that runs cool has the same settings as the one that has boiling hot caps.
You don't mention if both amps have their own powersupply and rectifier board, I assume this is the case.
Check if both combo's put out the same Voltage to their respective amp.
Switch them and see if it makes a difference.
Based on the overheating caps, I suspect a malfunction in the output stage.
Did you contact the seller?
Regards, Jan.
Hi and thanks for the replay!
I only have one setup of power supply and rectifier. I have switched between the amp boards and tried to run them under same conditions. And one of them runs very hot. I have ordered a oscilloscope and dummyloads (not just for this project) and will try to measure and figure out what the problem is.
I contacted Sure Hifi and they are going to send me a replacement amp. They have been very helpful.
Regards
Lars
I only have one setup of power supply and rectifier. I have switched between the amp boards and tried to run them under same conditions. And one of them runs very hot. I have ordered a oscilloscope and dummyloads (not just for this project) and will try to measure and figure out what the problem is.
I contacted Sure Hifi and they are going to send me a replacement amp. They have been very helpful.
Regards
Lars
WONDOM AA-AB32291
I have a WONDOM AA-AB32291, and a tube preamp with a 100K volume pot. Can I connect the AA-AB32291 without problems to the preamp. Or should I reduce the gain. Thanks allready for the answer.
Grtz Teake
I have a WONDOM AA-AB32291, and a tube preamp with a 100K volume pot. Can I connect the AA-AB32291 without problems to the preamp. Or should I reduce the gain. Thanks allready for the answer.
Grtz Teake
Hoi Teake,
I'd turn the preamp output down before connecting it to the poweramp and see when, or if, any distortion appears when you turn up the volume.
Most likely your ears will be the limiting factor...
Regards, Jan.
I'd turn the preamp output down before connecting it to the poweramp and see when, or if, any distortion appears when you turn up the volume.
Most likely your ears will be the limiting factor...
Regards, Jan.