Topping LA90 Discrete Amplifier Review

[antcollinet]

Again - that is the output - which is not the C7 shotgun connector.

 

[Sokel]

Again - that is the output - which is not the C7 shotgun connector.

View attachment 325306

You mean the actual PSU's body output?
Cause it looks like a fixed cord coming out of the PSU in the pics,leading to a 3-pin shotgun connector.

Can't see a connector like the pic you put anywhere,unless it's photographed.

Edit:I see what you mean now,there's no 2-pin shotgun connector,yes.

 

[Joest]

64V-4A

View attachment 325301

The little I searched couldn't find voltage in the cert requirements,only amperage,up to 2.5A.

Jep, but in Germany C7 (Shotgun) is only up to 2,5 A.
https://de.wikipedia.org/wiki/Gerätestecker#„Kleingerätekupplung“_(IEC-60320_C7/C8)

Talked to a friend: Don´t go out off your house, when La90D is on.

I want to make my own - better - power cable (vodoo). Impossible. Insurance.

In Germany you need C13/C14. It´s up to 10A.

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiWx4aYw7qCAxV4RvEDHZnTAbgQFnoECAUQAQ&url=https://www.steckerladen.de/Netz-Steckvorrichtungen/Geraetestecker/Kaltgeraetestecker-C13-C14:::148_809_321.html&usg=AOvVaw1__peKtKuICXlv1rD_rOjQ&opi=89978449​

Perhaps I´m wrong: I asked Amazon Germany..

 

[antcollinet]

Jep, but in Germany C7 (Shotgun) is only up to 2,5 A.
https://de.wikipedia.org/wiki/Gerätestecker#„Kleingerätekupplung“_(IEC-60320_C7/C8)
View attachment 325318

Talked to a friend: Don´t go out off your house, when La90D is on.

I want to make my own - better - power cable (vodoo). Impossible. Insurance.

In Germany you need C13/C14. It´s up to 10A.

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiWx4aYw7qCAxV4RvEDHZnTAbgQFnoECAUQAQ&url=https://www.steckerladen.de/Netz-Steckvorrichtungen/Geraetestecker/Kaltgeraetestecker-C13-C14:::148_809_321.html&usg=AOvVaw1__peKtKuICXlv1rD_rOjQ&opi=89978449​

Perhaps I´m wrong: I asked Amazon Germany..

Again, as I stated above. That is the maximum, for the input voltage range of 100V to 240V - IE, you'll only ever see 5A with a 100V input. Even that will be only at extreme (and never usually seen) conditions of continuous maximum output power.

At 230V (I think in Germany) you'll be only at 2.2A, and then only at that unrealistic operating condition. Probably lower because at 100V the PSU is likely less efficient.

See also here:

IEC 60320 Reference Chart | World Cord Sets

IEC 60320 Reference Chart - Definition and Standards Chart. C1/C2, C3/C4, C4/C6, C7/C8, C9/C10, C11/C12, C13/C14, C15/C16/, C17/C18, C19/C20, C21/C22, C23/C24

shop.worldcordsets.com

The IEC 60320 C7 is an ungrounded 2 Wire connector rated up to 250V and 2.5 Amps Internationally or 125V and 10 Amps in North America

 

[AltoVariago]

Again, as I stated above. That is the maximum, for the input voltage range of 100V to 240V - IE, you'll only ever see 5A with a 100V input. Even that will be only at extreme (and never usually seen) conditions of continuous maximum output power.

At 230V (I think in Germany) you'll be only at 2.2A, and then only at that unrealistic operating condition. Probably lower because at 100V the PSU is likely less efficient.

See also here:

IEC 60320 Reference Chart | World Cord Sets

IEC 60320 Reference Chart - Definition and Standards Chart. C1/C2, C3/C4, C4/C6, C7/C8, C9/C10, C11/C12, C13/C14, C15/C16/, C17/C18, C19/C20, C21/C22, C23/C24

shop.worldcordsets.com

This is a personal opinion, but a company being close to the limits in safety issues of its products doesn’t make me confortable at all.

 

[antcollinet]

This is a personal opinion, but a company being close to the limits in safety issues of its products doesn’t make me confortable at all.

No, it is an engineering fact. For a given output power, a switch mode power supply needs approx twice as much input current at 100V as it does at 200V

 

[Sokel]

No, it is an engineering fact. For a given output power, a switch mode power supply needs approx twice as much input current at 100V as it does at 200V

The misunderstanding comes from the fact that they don't specifically point the amperage for the two major families of mains voltage.
The could write "100-120V/ 5A" and "220-240V/ 2A",or,or...

And everyone would be happy.

 

[Joest]

Jep, or

A device that costs 900 Euros should have a C14 connection anyway. It's not a razor, after all.

 

[AltoVariago]

The misunderstanding comes from the fact that they don't specifically point the amperage for the two major families of mains voltage.
The could write "100-120V/ 5A" and "220-240V/ 2A",or,or...

And everyone would be happy.

I am not an expert, but would this mean that in the US (120 V) the UE regulations are not met? I would not like this if I were an American customer!

 

[AltoVariago]

Jep, or
View attachment 325434
A device that costs 900 Euros should have a C14 connection anyway. It's not a razor, after all.

Poor quality construction, period.

 

[antcollinet]

I am not an expert, but would this mean that in the US (120 V) the UE regulations are not met? I would not like this if I were an American customer!

Why not? The American regs are met. Most americans care little for regulations that come from overseas when they have perfectly good regs of their own.

 

[AltoVariago]

Why not? The American regs are met. Most americans care little for regulations that come from overseas when they have perfectly good regs of their own.

Most Europeans (including myself) would feel very uncomfortable owning a piece of electric equipment failing to meet American safety standards. Particularly if the company making it does not have a very good reputation on the reliability of its products.

 

[dmilller]

Most Europeans (including myself) would feel very uncomfortable owning a piece of electric equipment failing to meet American safety standards. Particularly if the company making it does not have a very good reputation on the reliability of its products.

I'm going to estimate that the vast majority of Americans do not consider EU safety standards. Plus we are 120V, which is probably meaningfully safer than 230. The idea of a 230V extension cord freaks me aout a little bit. But I don't know the validity of my concern.

 

[antcollinet]

Most Europeans (including myself) would feel very uncomfortable owning a piece of electric equipment failing to meet American safety standards. Particularly if the company making it does not have a very good reputation on the reliability of its products.

That'd be a weird thing to get uncomfortable over if it met EU safety standards.

 

[IanRoberts]

Wow the LA90 discrete is on sale for $577 at Shenzen Audio! I just bought a second one because my power hungry Revel M106 don't seem satisfied with one.

 

[dimedrol]

Wow the LA90 discrete is on sale for $577 at Shenzen Audio! I just bought a second one because my power hungry Revel M106 don't seem satisfied with one.

seems like an immense deal going by the specs but if it only lasts 2 weeks that cost per week is probably on par with the most luxurious hi end amps out there that look like a space ship and weight like one too.

 

[renaudrenaud]

Wow the LA90 discrete is on sale for $577 at Shenzen Audio! I just bought a second one because my power hungry Revel M106 don't seem satisfied with one.

I see it at 679$ .

 

[IanRoberts]

I see it at 679$ .

It looks like it was only one sale for a day.

 

[kelesh]

I want this in standard 19 inch rackmount format, with VU meters. Otherwise, no deal

 

[SashaR]

Hello, I ask about the LA90 because it is similar to the LA90D. I was allowed to compare the yba pasion ia350a amplifier with my LA90 - in my apartment. How can you explain that the unprecedentedly magnificent LA90 sounds worse than an amplifier with only 95 dB signal-to-noise ratio (I couldn’t find any other measurements)??? I compared at all volume levels available on the LA90, including in mono configuration. If there is no distortion, if we have a direct wire, then how can we explain that it sounds worse (there are no details, especially in the highs - but I’m only talking about what is obviously below 12 kHz).
Thanks for explanation!