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

[Old_School_Brad]

They changed from
1 channel
ET eigentakt technology
400 watts into 4 ohms
A amplifier

to
1 channel
ET eigentakt technology
65 volts input
25 amps output max
S single? that is, not bridged
A amplifier

another one
1 channel
ET eigentakt technology
90 volts input
40 amps output max
B bridged
A amplifier

Thank you.

 

[mike70]

Probably all the amp anyone will ever need.

and the older it isn't?
Already inaudible THD and some watts less, means something?
(I'm not against improvements, but we need to maintain our foots in the ground )

 

[DearSX]

and the older it isn't?
Already inaudible THD and some watts less, means something?
(I'm not against improvements, but we need to maintain our foots in the ground )

I agree, you are 100% correct, even my current amp Parasound A21 is fine but I do like the novelty of having the latest and greatest

 

[mike70]

... my current amp Parasound A21 is fine ...

That's a really good class ab amplifier ... congrats. With "standard" sensibility speakers / room size / SPL I don't think you'll find any difference in a ABX test.

 

[DearSX]

That's a really good class ab amplifier ... congrats. With "standard" sensibility speakers / room size / SPL I don't think you'll find any difference in a ABX test.

Yeah, you are probably right

 

[boXem]

Here is the little beast

 

[pogo]

Would fit perfectly in some AVRs

 

[pogo]

The almost identical design to the 1ET400A should make replacement easy:

 

[boXem]

I just took a 1ET400A based amp, installed 2 1ET6525SA inside and it was running. Had worse experiences...

 

[cicastol]

I just took a 1ET400A based amp, installed 2 1ET6525SA inside and it was running. Had worse experiences...

is it worth?

 

[Buckeye Amps]

is it worth?

For people with existing 400A's to upgrade to the 6525SA? No.

But for those wanting a new Purifi amp it is a moot point since the 6525SA has replaced the 400A anyways.

 

[boXem]

is it worth?

Since it's red instead of green, we know for sure that it's faster.
Specs are better.

 

[Buckeye Amps]

Since it's red instead of green, we know for sure that it's faster.
Specs are better.

They need to add a racing stripe

 

[Buckeye Amps]

The Green 1ET400A board has a much smoother, cool sensation to the ears. I'll stay with my old Purifi. Too much pepper in the Red 6525SA sound.

So that's where sound coloring finally comes from after all these years: PCB color.

 

[Matias]

I think the green PCB sounds more natural, organic; while the red PCB definitely sounds warmer, even spicier.

 

[pogo]

What makes the 2nd generation special? Hasn't the 'algorithm' also been changed?

 

[Oniiz86]

Since it's red instead of green, we know for sure that it's faster.
Specs are better.

Would you say the noise floor is significantly improved over the 1ET400A module, so would be best for highly sensitive horn tweeter designs, as they tend to exacerbate tweeter hiss, with the 1ET400A it still exhibits moderate hiss, so would the 2nd generation 1ET6525SA & 1ET9040BA modules be significantly improved in such situations?

 

[pma]

Would you say the noise floor is significantly improved over the 1ET400A module, so would be best for highly sensitive horn tweeter designs, as they tend to exacerbate tweeter hiss, with the 1ET400A it still exhibits moderate hiss, so would the 2nd generation 1ET6525SA & 1ET9040BA modules be significantly improved in such situations?

Noise floor of the DAC + amp system is in case of SOTA devices usually defined by DAC output noise x amplifier gain. Rather than by the amp noise itself.

 

[boXem]

Would you say the noise floor is significantly improved over the 1ET400A module, so would be best for highly sensitive horn tweeter designs, as they tend to exacerbate tweeter hiss, with the 1ET400A it still exhibits moderate hiss, so would the 2nd generation 1ET6525SA & 1ET9040BA modules be significantly improved in such situations?

1ET6525SA residual noise is almost divided by two when compared to the 1ET400A. That's a signifiant improvement that puts even more emphasis on the importance of the amplifier's input stage and, as written by @pma, the upstream components residual noise.

 

[boXem]

What makes the 2nd generation special? Hasn't the 'algorithm' also been changed?

Different modulator topology.
What are you calling 'algorithm'?