I have this table internet radio: Philips NP2900/12 and it's presenting this weird behavior.
It plays perfectly on low volume, but once i increase the volume to more than 20-30% the sound starts coughing - choking.
I first suspected the power supply (12V 3.5A external block), but testing with a different one (same specs) and even with a more powerful one (>5A) made no difference.
Can someone have a listen on this small video i recorded to show the problem https:youtu.be/awMXZLsPI94 and help me figure what's wrong.
Should i look on the amp circuit? It is a 4 speaker design with dual TPA3101D2, one driving the low freq. speakers, the other driving the tweeters.
Individual speakers are blown? (unlikely).
Or perhaps i should look for inner power circuit problems?
Thanks.
Edit: I opened the device and disconnected first the tweeters (to test it only with the low freq. speakers) and then the low freq. speakers (to test it only with the tweeters).
Same result.
It plays perfectly on low volume, but once i increase the volume to more than 20-30% the sound starts coughing - choking.
I first suspected the power supply (12V 3.5A external block), but testing with a different one (same specs) and even with a more powerful one (>5A) made no difference.
Can someone have a listen on this small video i recorded to show the problem https:youtu.be/awMXZLsPI94 and help me figure what's wrong.
Should i look on the amp circuit? It is a 4 speaker design with dual TPA3101D2, one driving the low freq. speakers, the other driving the tweeters.
Individual speakers are blown? (unlikely).
Or perhaps i should look for inner power circuit problems?
Thanks.
Edit: I opened the device and disconnected first the tweeters (to test it only with the low freq. speakers) and then the low freq. speakers (to test it only with the tweeters).
Same result.
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