SET amp owners thread

I had not listened for about 2 weeks. Was kind of pissed about one of the Audion SET 845 running microphonic. I used some white tacky putty and damped the chassis vibrations as well as I could so they would not circle back into the tube. That helped a lot. But, I walked away for a couple weeks being slightly frustrated. And I also flew to Texas to get the spinal injections of Mavix, PRP, Ozone and some other stuff. I'm already responding very well. My doc says I should recover 100%. I just need to give it 3 to 5 months to really set in place.

But stereo is what were here about. I fired up my system and was looking around Qobuz and saw a new, Deluxe version of A Charle Brown Christmas. I love this album and am very familiar with it. Right off I saw 24 tracks and was wondering what was up. I saw some tracks that were titled Take 3 and other odd names. Turnes out they were studio practice cuts. Right off I was impressed how well they were playing. After working through the unfamiliar tracks I went to the top and started the album. I was shocked how darn good it sounded. I had to stop it in the second song and open HQPlayer to compare to one of my CD rips. The Qobuz was leaps better. So good I bought the album. Anyhow, the real point was, as I sat there I was sort of thinking, what more do I really need to do. My stereo is totally satisfying. Its great. I want the amp fixed. But what would I really gain if I dumped another $60,000 into it. Actually, as its configured, its pretty simple. A server with a USB to a DAC. A interconnect to a pair of monoblocks that have volume pots in them. Amps to speakers. Thats about it. 2 ethernet switches. A stock switch and a Linear Solution switch. Power is from a single Torus RM20 fed with a 12 awg wire in a steel pipe.
Could I improve it. Sure. Would I gain a lot. Not sure. It's pretty darn good. Would it make music more enjoyable to improve it????? I don't think so. It was sort of hitting me that at some point the sound is good enough that continuing to shape it won't increase the enjoyment of the music.
If I was going to improve it, what would I get. I think there is a little smear in backing vocal. They aren't totally clear and distinguishable. I can still hear each of the kids' backing vocals in Hark The Harold Angels. I have heard them just a little more individualized and placed in space.
All in all it seems 17 watts or so is doing fine running my PAP Trio 15 speakers. I like the SET sound. Once you have lived with it for a while and gotten use to it, its very enjoyable. Can people pull their pants down and make a mess on it with technical jargon. Sure. But I don't know throwing technical this and that at audio improves enjoyment. I actually take issue with SS amps in that they seem to be too good. It's like there are no faults. It's just there. Go ahead and make fun of euphoric colorations. But once you live with them for a while and understand why they make you smile, you start to forget about the idea of perfections and relax into enjoying the music. I feel I am there and I am good with leaving my stereo as is for a while. One day I will have the one amp circuit corrected. But for now I'm good to leave it alone and play music.
 
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Could I improve it. Sure. Would I gain a lot. Not sure. It's pretty darn good. Would it make music more enjoyable to improve it????? I don't think so. It was sort of hitting me that at some point the sound is good enough that continuing to shape it won't increase the enjoyment of the music.
If I was going to improve it, what would I get. I think there is a little smear in backing vocal. They aren't totally clear and distinguishable. I can still hear each of the kids' backing vocals in Hark The Harold Angels. I have heard them just a little more individualized and placed in space.
All in all it seems 17 watts or so is doing fine running my PAP Trio 15 speakers. I like the SET sound. Once you have lived with it for a while and gotten use to it, its very enjoyable. Can people pull their pants down and make a mess on it with technical jargon. Sure. But I don't know throwing technical this and that at audio improves enjoyment. I actually take issue with SS amps in that they seem to be too good. It's like there are no faults. It's just there. Go ahead and make fun of euphoric colorations. But once you live with them for a while and understand why they make you smile, you start to forget about the idea of perfections and relax into enjoying the music. I feel I am there and I am good with leaving my stereo as is for a while. One day I will have the one amp circuit corrected. But for now I'm good to leave it alone and play music.
I"ve found that getting the preamp right is far more important than anything the amps can do. You can't fix problems upstream by anything downstream- as you found with the different digital source files.

That is why I run my turntable with balanced connections. If there's anywhere in a system to get the interconnect cable right, its the turntable. You can't fix a cable coloration downstream no matter the amps or speakers. Balanced cables are supposed to eliminate cable colorations and if you set them up right, they do.

Once the preamp is right then you can mess with the amps.
 
I had not listened for about 2 weeks. Was kind of pissed about one of the Audion SET 845 running microphonic. I used some white tacky putty and damped the chassis vibrations as well as I could so they would not circle back into the tube. That helped a lot. But, I walked away for a couple weeks being slightly frustrated. And I also flew to Texas to get the spinal injections of Mavix, PRP, Ozone and some other stuff. I'm already responding very well. My doc says I should recover 100%. I just need to give it 3 to 5 months to really set in place.

But stereo is what were here about. I fired up my system and was looking around Qobuz and saw a new, Deluxe version of A Charle Brown Christmas. I love this album and am very familiar with it. Right off I saw 24 tracks and was wondering what was up. I saw some tracks that were titled Take 3 and other odd names. Turnes out they were studio practice cuts. Right off I was impressed how well they were playing. After working through the unfamiliar tracks I went to the top and started the album. I was shocked how darn good it sounded. I had to stop it in the second song and open HQPlayer to compare to one of my CD rips. The Qobuz was leaps better. So good I bought the album. Anyhow, the real point was, as I sat there I was sort of thinking, what more do I really need to do. My stereo is totally satisfying. Its great. I want the amp fixed. But what would I really gain if I dumped another $60,000 into it. Actually, as its configured, its pretty simple. A server with a USB to a DAC. A interconnect to a pair of monoblocks that have volume pots in them. Amps to speakers. Thats about it. 2 ethernet switches. A stock switch and a Linear Solution switch. Power is from a single Torus RM20 fed with a 12 awg wire in a steel pipe.
Could I improve it. Sure. Would I gain a lot. Not sure. It's pretty darn good. Would it make music more enjoyable to improve it????? I don't think so. It was sort of hitting me that at some point the sound is good enough that continuing to shape it won't increase the enjoyment of the music.
If I was going to improve it, what would I get. I think there is a little smear in backing vocal. They aren't totally clear and distinguishable. I can still hear each of the kids' backing vocals in Hark The Harold Angels. I have heard them just a little more individualized and placed in space.
All in all it seems 17 watts or so is doing fine running my PAP Trio 15 speakers. I like the SET sound. Once you have lived with it for a while and gotten use to it, its very enjoyable. Can people pull their pants down and make a mess on it with technical jargon. Sure. But I don't know throwing technical this and that at audio improves enjoyment. I actually take issue with SS amps in that they seem to be too good. It's like there are no faults. It's just there. Go ahead and make fun of euphoric colorations. But once you live with them for a while and understand why they make you smile, you start to forget about the idea of perfections and relax into enjoying the music. I feel I am there and I am good with leaving my stereo as is for a while. One day I will have the one amp circuit corrected. But for now I'm good to leave it alone and play music.
Can you tell me a little bit more about what you did to tame the chassis vibrations? I've got a dht pre that I need to do some work on. Hadn't thought about adding tacky puddy...

Thanks.
 
Can you tell me a little bit more about what you did to tame the chassis vibrations? I've got a dht pre that I need to do some work on. Hadn't thought about adding tacky puddy...

Thanks.
My amp has a unique design. There is a plate of very thin sheet metal on 4 stand off brackets. The preamp and driver tube are mounted to that thin sheet of metal. There is another plate of metal that goes over the top that covers all the wiring underneath. There is a quarter inch gap between the two of them. I have the tacky putty wrapped in a circle around the preamp and driver tube between the two plates of metal.

There is a stamped metal cover that goes over the transformers. I use a pinch of tacky putty at the screw holes where the base attaches to the bottom frame.
That has helped on a temp basis.
 
My amp has a unique design. There is a plate of very thin sheet metal on 4 stand off brackets. The preamp and driver tube are mounted to that thin sheet of metal. There is another plate of metal that goes over the top that covers all the wiring underneath. There is a quarter inch gap between the two of them. I have the tacky putty wrapped in a circle around the preamp and driver tube between the two plates of metal.

There is a stamped metal cover that goes over the transformers. I use a pinch of tacky putty at the screw holes where the base attaches to the bottom frame.
That has helped on a temp basis.
Had you considered fabricating a beefier plate?

If you are getting vibration from a regular EI core power transformer, there is a way to isomerically isolate them from the chassis that is quite effective.
 
My amp has a unique design. There is a plate of very thin sheet metal on 4 stand off brackets. The preamp and driver tube are mounted to that thin sheet of metal. There is another plate of metal that goes over the top that covers all the wiring underneath. There is a quarter inch gap between the two of them. I have the tacky putty wrapped in a circle around the preamp and driver tube between the two plates of metal.

There is a stamped metal cover that goes over the transformers. I use a pinch of tacky putty at the screw holes where the base attaches to the bottom frame.
That has helped on a temp basis.
change 4 standoff against swinging metal maybe it helps..
61P6eyw4jqL.jpg
 
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Yea. The transformer is sitting on wood. Stupid. I gave the texh special NASA anti vibration washers to use. Never installed.

Thought about buying a aluminum or copper plate and drilling it to fit.

I really need the circuit fixed. The one amp is fine as far as sensitivity to vibrations. The other needs work.

I am more likely to box them up and put the Blade back to use. My shots are working well and I can more aptly move around the 78 lb monoblocks.
 

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