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Pop noise often occurs when turning on,off class d amps
- Thread starter gasolin75
- Start date
I don't have amps doing pop noises - neither class AB or class D - only sources or DAC.
In a larger setup I use a staggered (programmed) power-on which cycles through sources, amps, TV. Sources shall be on before amps, that's the most important part. And with a lot of inrush current a staggered start is necessary anyway (sometimes).
Whenever a source triggers an amp there is a small delay that is already enough to suppress any pop noise form the source - in my experience.
I notice some devices produce a considerable pop. Like the SMSL SU-2. Don't power cycle that thing with amps on.
But the absolute worst in my experience is onboard PC RealTeks with an amp already on. Extreme driver excursion, def. a thing to avoid.
In a larger setup I use a staggered (programmed) power-on which cycles through sources, amps, TV. Sources shall be on before amps, that's the most important part. And with a lot of inrush current a staggered start is necessary anyway (sometimes).
Whenever a source triggers an amp there is a small delay that is already enough to suppress any pop noise form the source - in my experience.
I notice some devices produce a considerable pop. Like the SMSL SU-2. Don't power cycle that thing with amps on.
But the absolute worst in my experience is onboard PC RealTeks with an amp already on. Extreme driver excursion, def. a thing to avoid.
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OP it could be as simple as turning the volume down, waiting 30 seconds or so before turning the system off. I have personally practiced that procedure since I started using a stereo 60+ years ago. My father did it, so I did it. It has served me well. Many of the older preamps had the off switch hooked to the volume pot. You had to turn the volume all the way down and then that extra bit to switch it past the detent in the pot to shut them off. Built-in no-pop shutdown. You can also add an inexpensive no-pop circuit to the system, but you should still turn the volume down before shutting down.
I have a neighbor who has replaced the tweeters in his Watt Puppies 3 times. It is usually his kids shutting the system down. He learned; they haven't. He quit buying matched pairs from Wilson; they were so expensive.
I use Mcintosh, Accuphase, Pass Lab, Cary and Mac valve amps, Nord class Ds, NU12,000 Behringers, and a few different clones like D5/D5 pro/D9, and Musmys A75s. Never a sound, but leave the volume up when shutting down; you might.
All of my Mcintosh preamps ramp the volume up and down when shutting down; what is that telling you? If Mcintosh has done it for over 30 years, maybe it's not such a bad practice.
Regards
I have a neighbor who has replaced the tweeters in his Watt Puppies 3 times. It is usually his kids shutting the system down. He learned; they haven't. He quit buying matched pairs from Wilson; they were so expensive.
I use Mcintosh, Accuphase, Pass Lab, Cary and Mac valve amps, Nord class Ds, NU12,000 Behringers, and a few different clones like D5/D5 pro/D9, and Musmys A75s. Never a sound, but leave the volume up when shutting down; you might.
All of my Mcintosh preamps ramp the volume up and down when shutting down; what is that telling you? If Mcintosh has done it for over 30 years, maybe it's not such a bad practice.
Regards
You can implement as much delay as you like, if there is DC at the output, it will pop.
Absolutely not related to amplification class but can come from the amp itself or the upstream components if DC is not filtered out by the amp.
Absolutely not related to amplification class but can come from the amp itself or the upstream components if DC is not filtered out by the amp.
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