Eversolo A8 and Nilai Monoblocks Cracking sounds

[Stereoed]

Eversolo only have one trigger out, but want to switch on two Nilai power amplifiers via triggers. Y Splitter cables only come in stereo though. That's what I did. But. Now I have a problem. When I start the Eversolo A8, it switches on the power amplifiers via 12 volts before it has fully booted up (takes about 24 seconds). But as soon as the boot process is complete after about 24 seconds, I hear a crackling noise from both speakers. It sounds like a static discharge. What could it be? I then disconnected the trigger cables. Now the only connection between the Eversolo and the mono power amplifiers is via the XLR cables. Now I switch on the monos manually and then start the Eversolo. I still get this crackling noise. Does anyone have any ideas?

Regards
Ed

 

[Snoopy]

Probably the poweramps are at full volume before the eversolos preamp regulates that down ?

So boot the eversolo and turn the amps on after that. Is the crackling gone ?

 

[Stereoed]

Probably the poweramps are at full volume before the eversolos preamp regulates that down ?

So boot the eversolo and turn the amps on after that. Is the crackling gone ?

Hello Snoopy. Thanks. Yes, if I only switch on the power amps once the Eversolo A8 has fully booted up, then the noise disappears. But then why do I need the Eversolo's 12-volt trigger? Strange. Especially since I previously had a Yamaha AS 2200. I connected it to the Eversolo via the Main In, i.e., as a power amp. I didn't get the noise when I used the trigger. Main In in conjunction with the trigger on the Yamaha only worked via RCA. That's why I bought pure mono power amps to use triggers in conjunction with XLR. If, as you suspect, the Eversolo sends the full volume to the power amps before the Eversolo's preamp regulates it, then the sequence of processes in the Eversolo is wrong. And why wasn't the noise present on the Yamaha? Regards, Ed

 

[Snoopy]

I suspect the Yamaha has a delay. That’s the relay clicking that you hear when u turn on a oldschool amplifier.
That probably gives the eversolo enough time to turn on the preamp section.

The Nilai amps probably don’t have that ?

I got a AS2200 recently Amazing unit. Why would you replace that monster with a class D toy ?

I think there are powerstrips / plugs with a delay . That could fix your problem.

 

[Stereoed]

I suspect the Yamaha has a delay. That’s the relay clicking that you hear when u turn on a oldschool amplifier.
That probably gives the eversolo enough time to turn on the preamp section.

The Nilai amps probably don’t have that ?

I got a AS2200 recently Amazing unit. Why would you replace that monster with a class D toy ?

That's a very good question. I think because the Nilai runs very cool. And the Nilai imo is not a toy. Did you ever heard the Nilai monos? It sounds very good.
Regards Ed

 

[Snoopy]

That's a very good question. I think because the Nilai runs very cool. And the Nilai imo is not a toy. Did you ever heard the Nilai monos? It sounds very good.
Regards Ed

Well your problem is probably that the eversolo takes to long to boot up. So you either remove the trigger and do it manually with a smart power plug or find something to delay power amps from booting.

But I would also suggest you read this thread , the posts about the preamp gain.

Post in thread 'Eversolo DMP-A8 Balanced Streamer/DAC Review'
https://audiosciencereview.com/foru...lanced-streamer-dac-review.55826/post-2259765

No I didn’t hear the nilai monos.

 

[F1Fan72]

I have the same issue with my A6 Gen2 and mono blocks

 

[Snoopy]

Speaker pops when switching source after adding Eversolo A8

Hello all, I’m scratching my head trying to figure out why my speakers starting to pop after I added Eversolo A8 to my system. I have Simaudio integrated amp feeding my main speakers, AVR pre-out to Simaudio for movies. Now I have Eversolo A8 into the mix - using both RCA and XLR connected to...

audiosciencereview.com

 

[boXem]

I still get this crackling noise. Does anyone have any ideas?

The eversolo emits a nasty noise (mainly DC) at the end of it's boot sequence. Since the Nilai is DC coupled, this noise is amplified.

Probably the poweramps are at full volume before the eversolos preamp regulates that down ?

Poweramps are at full volume, always, that's why a preamp is needed. If the preamp is noisy, the amp amplifies the noise, that's what it's designed for.

 

[Snoopy]

Shouldn’t the eversolo mute it’s output to avoid that ? I know that headphone amps mute the output to avoid that DC „pop“.

And I think there is no integrated amp or AV receiver that doesn’t mute the loudspeakers before the boot up sequence is done.

 

[Extreme_Boky]

Eversolo A8 should have:
1. Muting relay(s), to keep the analog-out "hot" shorted to ground potential while booting
2. DC offset nuling servo/neg. feedback, or at least sound coupling / DC blocking caps, in series with the analog out

Amps are fine...

The fact that Eversolo is doing what you are telling us here... is hard to believe. It is supposed to be a highish-end unit. Not good....

More Eversolo fun here....

Speaker pops when switching source after adding Eversolo A8

Hello all, I’m scratching my head trying to figure out why my speakers starting to pop after I added Eversolo A8 to my system. I have Simaudio integrated amp feeding my main speakers, AVR pre-out to Simaudio for movies. Now I have Eversolo A8 into the mix - using both RCA and XLR connected to...

www.audiosciencereview.com

and here...

Eversolo DMP A8 speaker crackle/pop

Hello all, Looking for advice on whether to keep or send back the A8. I've been experiencing a crackle/pop sound when I switch between between the input sources. I have tried the obvious: switching speaker wire, speakers, XLR cables. Nothing works. This noise disappears when I put my NAD...

www.audiosciencereview.com

 

[Stereoed]

Der Eversolo gibt am Ende seiner Boot-Sequenz ein unangenehmes Geräusch (hauptsächlich Gleichstrom) von sich. Da der Nilai gleichstromgekoppelt ist, wird dieses Geräusch verstärkt.

Do you know why

 

[boXem]

Do you know why

Usually improper muting circuit design, or proper muting circuit improperly used by the firmware.

 

[Stereoed]

Oh. That's not so good.
Thank you for your answer.

 

[Stereoed]

Usually improper muting circuit design, or proper muting circuit improperly used by the firmware.

Are your amps Dc coupled too?
Thanks in advance

 

[boXem]

Are your amps Dc coupled too?
Thanks in advance

Arthur have DC filtered out, A series are DC coupled.

 

[Stereoed]

Arthur have DC filtered out, A series are DC coupled.

You wrote that the Arthur series power amplifiers have DC filters at the output. Does that mean that these amplifiers don't transmit any power-on noise to the speakers via the Eversolo A8's XLR output?

Thanks in advance

 

[boXem]

You wrote that the Arthur series power amplifiers have DC filters at the output. Does that mean that these amplifiers don't transmit any power-on noise to the speakers via the Eversolo A8's XLR output?

Thanks in advance

There is indeed a DC filter inside the Arthur amps. On the "startup (or shutdown) noisy" electronics that I have tested, it was quite efficient. That said, I didn't test with an Eversolo A8.
@Purité Audio has both an Arthur and an A8, he may confirm or not.
Another advantage with our amps (both A and Arthur) is the audiosense. Basically, if the A8 is not powered off-on within the 10 minutes time needed to have the amp self standby, the amp will always be in standby when the A8 wakes up. So it's noise won't be amplified and will most certainly wake the amplifier to get it ready when music starts playing.

 

[Stereoed]

There is indeed a DC filter inside the Arthur amps. On the "startup (or shutdown) noisy" electronics that I have tested, it was quite efficient. That said, I didn't test with an Eversolo A8.
@Purité Audio has both an Arthur and an A8, he may confirm or not.
Another advantage with our amps (both A and Arthur) is the audiosense. Basically, if the A8 is not powered off-on within the 10 minutes time needed to have the amp self standby, the amp will always be in standby when the A8 wakes up. So it's noise won't be amplified and will most certainly wake the amplifier to get it ready when music starts playing.

Hello,
I don't understand your answer because you wrote here in this thread at May 10th "
The eversolo emits a nasty noise (mainly DC) at the end of it's boot sequence. Since the Nilai is DC coupled, this noise is amplified."

How can you thread this if you don't have testet the Eversolo A8?

 

[boXem]

Hello,
I don't understand your answer because you wrote here in this thread at May 10th "
The eversolo emits a nasty noise (mainly DC) at the end of it's boot sequence. Since the Nilai is DC coupled, this noise is amplified."

How can you thread this if you don't have testet the Eversolo A8?

Because nasty noises emitted by electronics are usually DC. I should have written "most probably".