Currently i am testing the equipment for my 3 way speaker using one amplifier at a time and a passive frequency splitter, planning to move to individual amplification with separate volume adjustment once the test system reasonably works.
For this i have 2 Kemo M034N (intended for Woofer and Mid) and a Kemo M033N (intended for Tweeter)
When using a M034N it screeches constantly.
Having read the product description i was told the power supply may be too weak, as the amplifier may draw peaks of 4 ampere, yet it can only work at full power at 16V with 4Ω speakers, while i have 8Ω speakers, and tried both 16 and 12V with no difference, with the power supply claiming to be able to supply 5 ampere.
It also recommended adding a 4700μF condensator, which i did, without it helping.
The system screeches as it used to, continues briefly after unplugging the power supply, then plays the music cleanly until the condensator is empty.
The first test used only the Woofer directly connected to the amp output, with the screeching just as strong. The only difference in adding the splitter and the other speakers was the music sound going form unbalanced bottom heavy to top heavy, so those can be ruled out as a source of failure.
When trying with the M033N, everything else the same, it works fine except for the unbalanced sound.
Both were wired the way the description suggests, with the M034N using the same port for negative signal in and power, but instructions stating to never connect power and speaker, the M033N using the same for negative power and speaker, but separate input.
The description of the M033N claims there is an internal connection from negative input to the other negative, and that negative input can be externally connected to the other negatives instead, but recommends not doing this due to higher risk of interference. Having tried this i also get a constant noise.
Does anyone here know what this interference protection could be?
If it is something simple that could be soldered in that would be extremely helpful.
Thank you for your attention either way
For this i have 2 Kemo M034N (intended for Woofer and Mid) and a Kemo M033N (intended for Tweeter)
When using a M034N it screeches constantly.
Having read the product description i was told the power supply may be too weak, as the amplifier may draw peaks of 4 ampere, yet it can only work at full power at 16V with 4Ω speakers, while i have 8Ω speakers, and tried both 16 and 12V with no difference, with the power supply claiming to be able to supply 5 ampere.
It also recommended adding a 4700μF condensator, which i did, without it helping.
The system screeches as it used to, continues briefly after unplugging the power supply, then plays the music cleanly until the condensator is empty.
The first test used only the Woofer directly connected to the amp output, with the screeching just as strong. The only difference in adding the splitter and the other speakers was the music sound going form unbalanced bottom heavy to top heavy, so those can be ruled out as a source of failure.
When trying with the M033N, everything else the same, it works fine except for the unbalanced sound.
Both were wired the way the description suggests, with the M034N using the same port for negative signal in and power, but instructions stating to never connect power and speaker, the M033N using the same for negative power and speaker, but separate input.
The description of the M033N claims there is an internal connection from negative input to the other negative, and that negative input can be externally connected to the other negatives instead, but recommends not doing this due to higher risk of interference. Having tried this i also get a constant noise.
Does anyone here know what this interference protection could be?
If it is something simple that could be soldered in that would be extremely helpful.
Thank you for your attention either way
Note: When there is error radiation e.g. net humming,
etc. the cooling plate must be electrically connected to
the negative terminal of the supply voltage.
etc. the cooling plate must be electrically connected to
the negative terminal of the supply voltage.
thank you very much
had overlooked that since the screeching sounded not even remotely close to net humming, but it worked
had overlooked that since the screeching sounded not even remotely close to net humming, but it worked
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