Apollon Audio Purifi Amp Popping issue

[Extreme_Boky]

if you opt for a power on trigger, you will not get a power-on switch: that its one or the other. They don’t add a standard power on button with the trigger, however strange that may be.

That is strange... so, is there an option to have the mains power switch, AND the mains on/off trigger..??

 

[Apollon Audio]

Just to be perfectly frank, Tibor is right he did offer to make the production error right, though still awaiting the SI994 and affirmation that he will be expressing over the missing part. As for the sound with included opamp 1658, not impressed, I know it improve when the new SI994 is added. I have not heard any popping, hum or crackling sound coming from the new amp and certainly hope I don’t!
And hes also right that the addition of the op amp was made a day after initial order. Other than that I still have faith in Apollon Audio and hope we can amicably resolve this issue. If I can make any recommendation to Tibor and his team, it would be that whoever is responsible for adding custom request to the production sheet be spoken to, as it apparently seems to be becoming somewhat of a trend despite their excellent build quality and resolution attempts. Also That perhaps add a line of code to their website that clearly states if you opt for a power on trigger, you will not get a power-on switch: that its one or the other. They don’t add a standard power on button with the trigger, however strange that may be. I erroneously thought all amps come with a power on button and if you opt for the trigger then you get one for the additional trigger costs, not that it excludes a power-on button, entirely. Other than that great build quality and in 48 hour trial so far no popping or crackling coming from this new amp. Great Job Apollon Audio.

The amplifier does have a power on/off switch. On the Lux series it’s located discreetly on the underside of the chassis, right next to the front left leg. It is very easy accessible, but it is hidden by design to keep the front panel clean.

 

[tmtomh]

As for the sound with included opamp 1658, not impressed, I know it improve when the new SI994 is added.

I do hope you've told yourself that and really believe it sincerely, since your own belief is the only factor that's going to make what comes out of your speakers with one opamp vs the other sound any different.

 

[muzak156]

The amplifier does have a power on/off switch. On the Lux series it’s located discreetly on the underside of the chassis, right next to the front left leg. It is very easy accessible, but it is hidden by design to keep the front panel clean.

 

[muzak156]

I stand corrected, there is a power switch below this great units front panel (left side if your standing in front of it). And I love the way she illuminates when turned on. Fancy Amp. Ty

 

[muzak156]

There are sonic differences, depending on the opamp used, particularly noticeable when paired with high end loudspeakers like my Buchardt S400 mk2’s; the opamp does change the source/sink more current than many ICs have and also keep the buffer from bottlenecking so micro-detail and reverb tails are easier to follow (more presice/pronounced).And Preserve HF transient information as well as phase linearity through the buffer. But you are right in that it is subjective, some folks will hear these differences while most may not, because they are quite subtle, but coming through my Gustard R26 and U18 ddc over i2s and ps audio bhk signature hybrid preamp, if there is a change I’ll hear it. if not then my quest for Audiophile Utopia will once again be shattered, in which case my quest for high fidelity:with things like tight deep accurate bass and wide deep & airy soundstage will continue onward. But I still prefer class D amps like the Apollon Purifi’s over pure class A amps because what you gain in mids and highs you tend to loss in bass. At least thats what I’vs discovered in my quest for air in the music, which is why its better to have a good synergy among your components. I mean mixing a class D fast accurateness with a preamp that adds that touch of warmth & airiness to the soundstage…ultimately getting an analog-like sound while maintaining speed and accuracy that benchmark fans crave, too clinical for my tastes, which is why I try and get the best but still reasonably priced amp like my Apollon Audio Purifi Elk, made by hand by those who care about the music.

• can source/sink more current than many ICs

 

[JSmith]

There are sonic differences, depending on the opamp used... micro-detail and reverb tails are easier to follow (more presice/pronounced).

Did you mean to post this nonsense at ASR?


JSmith

 

[poopy]

Did you mean to post this nonsense at ASR?


JSmith

He probably meant it but didn't mention he also moved his listening position closer to the speakers by 1 ft.

Obviously the difference comes from the op amp, what else?

 

[muzak156]

Hi all,

A long time lurker here but didn't have an account before, my current issue is a very high popping sound I noticed on my new Apollon Audio Amplifier Purifi Eigentakt 1ET6525SA. The amp was giving me random popping sound for the first week I received it and all my mind was it's the SMSL DAC (Raw-MDA1) or Audirvana upsampling. But yesterday I went deep into troubleshooting DAC was off and no music and still there is a popping sound. I moved the left speaker cable to right and the popping moved. I removed the xlr and left only the amp and speakers on and this time even a higher popping sound like almost cracking the tweeter. I tried RCA instead of XLR and still a popping sound what I notice is it's getting worse than before it gets higher and more frequent. Installed my old Rotel Amp as before and for hours today no popping whatesover. I contacted Apollon already and waiting for response. But anyone have an idea what's the cause?

I just received a new Apollon Audio Purifi Eigentakt 1ET6525SA and while initially I didn't hear any popping or crackling a day later I began to hear it to, though on mine its not constant I need a few more days of testing before I can say for sure. Though I have a Gustard R26 going through Gustard DDC and on my first amp that cost 129 USD I never heard a single pop so if I continue to hear it I will be informing Tibor, though it appears he picks and choses what emails he will respond to and for reasons only known to him has not responded to the last 3 emails. Will make couple more attempts before going in another direction.

 

[foden2025]

New update:

My Apollon Amp went silent, doesn't power on at all. After Apollon sent a replacement for the malfunctioned module in the OP everything was fine except a few times my playing went silent a couple of times, I thought it's jittering between DAC and Amp so I usually turn off everything off and sound come back again, strange issue but few days ago, I was playing a record and half way side 1 everything went silent. I removed the preamp from the chain and cleaned pots on it and then plugged it back it worked, I thought that's it. Next day no inputs working not the digital through DAC nor the analog from the turntable. I tried a different cables and inputs still nothing. I removed the preamp completely thinking it's the issue and went DAC to Apollon Amp no sound at all. I turned it off and the DAC a couple of times and nothing at the end the light on the power button is not turning on I don't hear a relay even, different cables didn't solve the issue. I contacted Tiborover the weekend but haven't receive a response yet. I just don't know if I'm unlucky or Hypex reliability is not that great.

 

[Deleted member 89782]

New update:

My Apollon Amp went silent, doesn't power on at all. After Apollon sent a replacement for the malfunctioned module in the OP everything was fine except a few times my playing went silent a couple of times, I thought it's jittering between DAC and Amp so I usually turn off everything off and sound come back again, strange issue but few days ago, I was playing a record and half way side 1 everything went silent. I removed the preamp from the chain and cleaned pots on it and then plugged it back it worked, I thought that's it. Next day no inputs working not the digital through DAC nor the analog from the turntable. I tried a different cables and inputs still nothing. I removed the preamp completely thinking it's the issue and went DAC to Apollon Amp no sound at all. I turned it off and the DAC a couple of times and nothing at the end the light on the power button is not turning on I don't hear a relay even, different cables didn't solve the issue. I contacted Tiborover the weekend but haven't receive a response yet. I just don't know if I'm unlucky or Hypex reliability is not that great.

Any updates on this? Maybe it was just a blown fuse in the amp.
I very interested to hear some user feedback as I have a ET9040 double mono on order.

 

[IngMishael]

Any updates on this? Maybe it was just a blown fuse in the amp.
I very interested to hear some user feedback as I have a ET9040 double mono on order.

I use mine without issues and have for a year and some change now

 

[Deleted member 89782]

I use mine without issues and have fpr a year and some change now

What do you mean by "some change now"?

 

[Norcal]

What do you mean by "some change now"?

I think he means a a bit more than a year. The ‘and change’ is a figure of speech in English

 

[Deleted member 89782]

I think he means a a bit more than a year. The ‘and change’ is a figure of speech in English

Oh that change. Now I get it. Thanks.

 

[foden2025]

Any updates on this? Maybe it was just a blown fuse in the amp.
I very interested to hear some user feedback as I have a ET9040 double mono on order.

I didn't see any fuse on the inside or in the power input, Apollon is repairing the amp atm. I anticipate yours will be in good condition, the problem is the two issues I had didn't show up on first listen but just randomly after hours of listening. I have a concern about class D reliability but I'll keep my judgement in check as I had issues with Class AB amps in the past I guess that's the nature of this hobby.