What do measurements say about SET’s

[Rensselaer]

A 211-based SET Ongaku tribute from Uesugi Ken (Otomon Laboratory, Japan) that I recently commissioned is finished and will be shipped soon. He sent me the following measurements:

frequency response: 16Hz-45KHz (22 watts/8ohm)
hum level: 0.2mV
THD: 5% at 22W

I am requesting advice from the experts out there. I hear that SET’s sound great because the lack distortion in the upper odd-order harmonics. Some say the distortion makes them sound good, while still others say they sound good despite the distortion.

What do these measurements tell you? To me, the frequency response seems to be very good (however my speakers can’t go that low, and I can’t hear that high), but what about the THD and hum levels, are they acceptable?

 

[Gregm]

The primary objective of that amp is to help you listen to music, so the key question is: do you enjoy the music? If you do, end of story!

Coming to the question about the measurements you posted, no - any well-designed SS will measure far better in the values you have posted above. It remains to be seen how important these values are for your musical enjoyment!

Now, the actual measurements: the FR looks good for an SET (v. good even!), the noise is above average, the THD par for the course.(Again: for an SET. ) The output power (22W) is excellent and allows you to drive a great many speakers out there (mine included).

I for one don't think (even order) distortion makes the amp sound "better" at all; it would probably sound better without it - but you can't have a 211 SET with 0 distortion AND no feedback, and if you're to have distortion it might as well be low order even harmonics...

Presumably the amp sounds good despite the high level of distortion, etc, and that's why people choose to use SETs yourself included!

 

[Rensselaer]

4212 tube amplifier

I preferred the sound of his 4212 tube amps, but can you even find NOS 4212 valves anymore?

 

[Rensselaer]

My amp playing in builders system, not yet mine.
I should have entered this before the above.

 

[DasguteOhr]

My amp playing in builders system, not yet mine.
I should have entered this before the above.

Wireless Speaker..joke.nice amp

 

[Rensselaer]

Wireless Speaker..joke.nice amp

Yea, I already asked, two vids; the sound from one attached to the picture on the other.

 

[Audiohertz2]

A 211-based SET Ongaku tribute from Uesugi Ken (Otomon Laboratory, Japan) that I recently commissioned is finished and will be shipped soon. He sent me the following measurements:

frequency response: 16Hz-45KHz (22 watts/8ohm)
hum level: 0.2mV
THD: 5% at 22W

I am requesting advice from the experts out there. I hear that SET’s sound great because the lack distortion in the upper odd-order harmonics. Some say the distortion makes them sound good, while still others say they sound good despite the distortion.

What do these measurements tell you? To me, the frequency response seems to be very good (however my speakers can’t go that low, and I can’t hear that high), but what about the THD and hum levels, are they acceptable?

Well for starters you need a speaker with a zmin of 8ohm , best when talking SET is distortion numbers @1W , your speakers should be sensitive enuff as to not exceed 1 watt for normal Din ..

So mW levels to 1watt is what you are really interested in when discussing distortion numbers .


Regards

 

[Rensselaer]

Well for starters you need a speaker with a zmin of 8ohm , best when talking SET is distortion numbers @1W , your speakers should be sensitive enuff as to not exceed 1 watt for normal Din ..

So mW levels to 1watt is what you are really interested in when discussing distortion numbers .


Regards

0.3 mW at one watt.

 

[Rensselaer]

0.3 mW at one watt.

Sorry, that’s 0.3% at one watt

 

[Audiohertz2]

Ok those are the numbers you are interested in not the 5% quote to sound powerful . As you can see its a low distortion design in the mW level not high ..


Regards