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In the Forum: Audio Discussions
In the Thread: A listening room for a domesticated Cat?

Post Subject: I do not know powerful pentodes in output.Posted by Romy the Cat on: 10/21/2016

xandcg wrote:
I would like to know, if you do not mind to explain, since you cannot drive your bass modules using SET, why you use Solid State amplifiers instead Pentode or Push-Pull Triode?

Well, I need to say that I never heard any good bass from other amps then SET. No SS amp I even heard produced proper bass and a number of Push-Pull Triodes that I was exposed to did not sound acceptable. They were just OK but SET, or more accurately say DSET, was always better. So, this is pretty much an empirical standing then then some kind my private believe system. I do not have a lot of exposure to Pentodes in output stage, so I am not able to say anything. I heard some low power pentodes SET but they were just not so impressive amps all together. Anyhow, I do not have any experience on the subject to make any generalization.

The issue is that I use my ULF on transitional slope with open bottom which requires a LOT of power. Pretend that I need -3dB at 40Hz in the room. I can write slope from let say 10Hz +3dB that would arrive to 40Hz where I need to be (let forget for the sake of illustration about room modes and pretend that it is all linear). To pump +3dB at 10Hz you would need a lot of power and if you are in DSET world where OPT inductance and frequency are a part of power capacity then you end up with VERY expensive implantation and OPT is the size of a refrigerator. Considering that of you use the triode that might give to you let say 100-200W then you would be at 2000-3000V on plate and your refrigerator OPT need to be isolated for 5000V. That all makes it very demanding. If one know what and how he wants to do with Pentode SET then it is fine but not knowing how to kook it would be too inconvenient to try, at least to me.

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