2nd generation EIGENTAKT PURIFI 1ET6525SA (successor to the 1ET400A)

[goryu]

@Jimbob54 figured out who this was and gave him the boot. He’s like mold on the shower stall.

was wondering what took so long....

 

[Jimbob54]

was wondering what took so long....

Plenty more to get stuck into if you fancy it. Bring your big boy wellies though ;-)

 

[Soniclife]

Plenty more to get stuck into if you fancy it. Bring your big boy wellies though ;-)

Is that the moderator training video?

 

[Jimbob54]

Is that the moderator training video?

What is this 'training' of which you speak. I was given a mop and promised the choicest pickings from the bottom of the trough .

 

[Soniclife]

What is this 'training' of which you speak. I was given a mop and promised the choicest pickings from the bottom of the trough .

Ah so the truth is out finally, you mods all have your nose in the trough.

 

[keywork]

(Cross-posting this from another thread)

So i've got a pair of Sierra LX's (https://ascendacoustics.com/products/sierra-lx-pair?variant=40080757227574) and I have been waffling on pulling the trigger on one of these 1ET6525SA amps. Does anyone think the extra power @ 8ohms of the NCx500 would make a difference here? My gut says no but could use some confirmation bias ha. Thanks!

 

[boXem]

(Cross-posting this from another thread)

So i've got a pair of Sierra LX's (https://ascendacoustics.com/products/sierra-lx-pair?variant=40080757227574) and I have been waffling on pulling the trigger on one of these 1ET6525SA amps. Does anyone think the extra power @ 8ohms of the NCx500 would make a difference here? My gut says no but could use some confirmation bias ha. Thanks!

The NCx500 will give you 2 dB more headroom, at the cost of more thermal losses (heat).

 

[rsg]

The NCx500 will give you 2 dB more headroom, at the cost of more thermal losses (heat).

Are the NCx500 Hypex modules considerably less efficient than the Purifi 1ET6525SA modules? I thought the difference was a couple of percentage points. Purifi being 94% efficient vs. 92-93% for the Hypex? Or is this due to the implementation of the power supply rail voltage selection?

​

 

[boXem]

Are the NCx500 Hypex modules considerably less efficient than the Purifi 1ET6525SA modules? I thought the difference was a couple of percentage points. Purifi being 94% efficient vs. 92-93% for the Hypex? Or is this due to the implementation of the power supply rail voltage selection?

​

From my experience, what make the main difference between "hot" and "cool" in daily home use are the idling losses. 1.6 W vs 5.3 W (wich is already very good).

 

[Chaos01]

About what temperature differences in measured heat are we talking here?
Does the NCx get warm or hot? i mean my Marantz Cinema 50 is even in idle very warm...
So cool purifi or more power hypex, whats better or smarter to buy for use at home?

And do you have information sources about the Heat dissipation informations?
Thanks
Edit: in the power test video from Apollon the Hypex ncx gets to 66 or 80°C i think?
Found more information Here, enough maybe
Post in thread 'Deciding Between NCX500, Purifi Eigentakt and Nilai' https://audiosciencereview.com/foru...purifi-eigentakt-and-nilai.45744/post-1999271

 

[rsg]

From my experience, what make the main difference between "hot" and "cool" in daily home use are the idling losses. 1.6 W vs 5.3 W (wich is already very good).

Thanks. I would assume that this means on the Hypex based modules, one would have to use better heat sinks to mount them on. That is if heat dissipation is an issue during operation.

I'll make some measurements with an infrared thermometer once I get my Purifi based amp and compare them to my Hypex NCx500 based amp.

 

[boXem]

That is if heat dissipation is an issue during operation.

Having recently dismantled a 5 years old NC500 based amp from a competitor, I can guarantee that heat dissipation can be an issue during operation: everything inside was looking like out of an oven... No surprise that one of the PSs exploded.

 

[rsg]

Having recently dismantled a 5 years old NC500 based amp from a competitor, I can guarantee that heat dissipation can be an issue during operation: everything inside was looking like out of an oven... No surprise that one of the PSs exploded.

Wow, PS exploded? It should have shut down. That would be a fire hazard.

A 5 year old would be the previous NC500 modules? The current NCx500 is from 2022 or 23?

 

[boXem]

Wow, PS exploded? It should have shut down. That would be a fire hazard.

A 5 year old would be the previous NC500 modules? The current NCx500 is from 2022 or 23?

The safety mechanisms made their job, customer was really afraid but not any trace of flame.
Yes, old NC500 that was heating a lot more than the NCx500.

And if the Hypex is installed in tight spaces, stacked or in a closed cabinet it can multiply the heat issue.

Don't underestimate the power of dust.

 

[pma]

I am saying that Hypex NCxxxMP modules with SMPS need such heatsink as I do use. Then it can be turned on night and day and continuous maximum power is limited only by the distortion curve. I am torturing the amp since December 2021 without any issue. But to screw it at the bottom of the Al case is not enough. Purifi 1ET400A does not need such good heatsink.

 

[bricesan]

As long as the amplifier you choose has a sensitivity below 5.2 V RMS, i.e. a gain above 18,4 dB, you will be able to get full power out of it.
These modules are to be integrated with an input/gain stage that is specific to each manufacturer. There is no direct link between the upstream component (DAC or pre) and the module.

exept for audiophonics version where the input stage can be bypassed

 

[bricesan]

I answered once but reread qustion. Low gain is also suitable. High Gain is just my preference. I think impedance (reactive part of it) proportion is fine.
30 may of 2022 I asked directly Bruno Putzeys via email with this question

I got answer:

Before this also were question from me.

And answer

I thanked Bruno.

I used Eval1 with hg, lg both. I stay with hg now (buffer is on) because of color or something. But electrically there should be no problem.

i use a lynx aurora n as my dac and to my ears i much prefer the sound without input buffer

 

[boXem]

exept for audiophonics version where the input stage can be bypassed

As long as people understand what it means, good for them.

 

[rsg]

Some initial temperatures of the boXem A 4216/E4 using a an infrared thermometer with laser pointer. 4-channel Purifi 1E6525SA module based amplifier.

1. No load and turned on idle for >1 hour.
2. Ambient air temp around 76F (24.4C) with low humidity.
3. The top of the chassis is 89F (31.6C).
4. The outer two modules are cooler than the two inner ones. Outer two are around 102F (38.9C).
5. Inner modules are >106F (40.5C)
6. The Hypex SMPS3K power supply transformer is >118F (47.7C)
7. The power supply's large capacitors are at 91F (32.7C)

The heat sink plates look large, but heat venting is at bottom of chassis. The modules are mounted upside down which is an interesting design choice, but I assume this was done to avoid dust accumulation and accidentally spilling liquids in to the unit by mistake. Mine will be in a cabinet, so I will have to raise the feet by 1 inch (2.5 cm) and ensure adequate air flow.

These temperatures of the modules and PS are higher than my 3-channel Buckeye NCx500 amplifier with the Microaudio SMPS2K power supply. It too has good sinks.

 

[boXem]

Some initial temperatures of the boXem A 4216/E4 using a an infrared thermometer with laser pointer. 4-channel Purifi 1E6525SA module based amplifier.

Thanks for publishing these measurements

7. The power supply's large capacitors are at 91F (32.7C)

That's indeed the most important data: these are bulk caps on the mains voltage side. That makes them safety critical components whose ambiant temp must stay below the power supply rated ambiant temperature (50 °C).

The heat sink plates look large, but heat venting is at bottom of chassis. The modules are mounted upside down which is an interesting design choice, but I assume this was done to avoid dust accumulation and accidentally spilling liquids in to the unit by mistake.

Cold air intake is at the bottom of the chassis, hot air is leaving the box through the front and back vents (approx. 34 cm2). The idea of the upside down mounting came from experiments with an NC252MP whose power supply FETS are mounted below the bulk capacitors. Keeping these caps at reasonable temperatures with traditional flat mounting is quite ambitious but once you install the module upside down, heat-sinking almost becomes optional. And yes, I just hate dust in electronics, so grills on top of the chassis are a no go for boXem.
That said, there is always room for improvement and from mid December, a new heatsink allowing better bottom to top airflow around modules and PS will be used.