Tube or solid state?

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DVV

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Tube or solid state?
« Reply #120 on: 11 Feb 2003, 06:44 pm »
Quote from: audiojerry
So philosophically, bipolar is inherently better than mosfet or jfet?


Not philosophically, Jerry. I would say they are more predictable than power FETs insofar as their overall characteristics are better balanced than power FETs. Power FETs do have some aspects where they are better than bipolars, but also some aspects where they lag far behind bipolars, with not much in the middle. By comparison, bipolars are mostly in the middle and much less towards the extremes.

Up until some years ago, power MOSFETs had problems delivering current over say 6 or 7 amps; since that time, they have improved much, and today, they can deliver peaks of around 50 amps (UHC MOSFETs). Such devices cost around $250, and are available as NPN only, and are rated at 500W each.

Yet, a humble TIP 35C will deliver 25 amps continuous and up to 50 amps in peaks (the SGS-Thomson version), are rated at 125W, do have a PNP complement (TIP 36C) and cost (here in Europe at least) $5 per pair.

The point is, for much less money, you can have far superior overall performance using bipolars, which are available in a wide selection to suit any taste and budget. Despite some of their undoubted faults.

Cheers,
DVV

audiojerry

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Tube or solid state?
« Reply #121 on: 11 Feb 2003, 07:02 pm »
So Dejan,
You could have a design that uses tubes in the voltage gain input/driver stage, and bipolars for the output stage?
What would be so hard about that? :-)

Dan Banquer

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Tube vs. Solid State
« Reply #122 on: 11 Feb 2003, 07:12 pm »
Jerry;
  You have just defined on how most hybrids are done.

DVV

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Tube or solid state?
« Reply #123 on: 12 Feb 2003, 07:38 am »
Quote from: audiojerry
So Dejan,
You could have a design that uses tubes in the voltage gain input/driver stage, and bipolars for the output stage?
What would be so hard about that? :-)


Not could, it has been done, and probably is being done as we speak. But Dan said it - there are many problems with that. It's like trying to cross a bicycle and a car, so you end up with a scooter.

If you want tube sound, probably the best way to go about it is to use a tube preamp and a solid state amp. That way, you catch some of the best from both worlds without mixing and matching too much of what is VERY hard to match and mix.

Cheers,
DVV

nathanm

Tube or solid state?
« Reply #124 on: 12 Feb 2003, 08:16 am »
I would like to see a preamp that had different "voicings" kind of like a guitar amp, only not nearly as radical in tonal adjustment.  Imagine if you could throw a switch and go from "cold and neutral" to "warm and lush" or a few different variants all without swapping gear and cables around.  

The thing with this gear is that more often than not the thing only has one sound and if you aren't happy with that sound you've got no choice but to try something else.  Gets to be pretty tweaky and expensive.  It would be cool if you could have some choices of 'character' up front.

(ooh, lookit that; just 333 more posts to go! :angel: )

Jay S

Tube or solid state?
« Reply #125 on: 12 Feb 2003, 08:33 am »
Nathan, you are the  :evil:

DVV

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Tube or solid state?
« Reply #126 on: 12 Feb 2003, 12:34 pm »
Quote from: nathanm
I would like to see a preamp that had different "voicings" kind of like a guitar amp, only not nearly as radical in tonal adjustment.  Imagine if you could throw a switch and go from "cold and neutral" to "warm and lush" or a few different variants all without swapping gear and cables around.  

The thing with this gear is that more often than not the thing only has one sound and if you aren't happy with that sound you've got no choice but to try something else.  Gets to be pretty tweaky and expensive.  It would be cool if you could have some choices of 'character' up front.

(ooh, lookit that; just 333 more posts to go! :angel: )


Whyntchasayso? Can you live with two switches, one selecting between "cold" and "warm", the other between "soft" and "hard"? Also, what's your budget? I ask not because I am affiliated with the IRS (though I do know a narc cop California way, so watch it!), but if your budget is large enough, maybe you can also have the ability to select between "tube", "bipolar" and "MOSFET" outputs ....

Brother Nate, you are essentially talking about transfer characteristics. These CAN be altered inside an audio device if one designs for it. Not easy changing technologies on the fly, but I suspect even that could be possible if one sets his mind down to it. It all boils down to your budget.

And tone controls. If intelligently designed (which does NOT imply bankruptcy), they can do wonders for your overall sound in your own room. And with an insignificant sound imprint of their own.

Cheers,
DVV

audiojerry

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Tube or solid state?
« Reply #127 on: 12 Feb 2003, 05:34 pm »
DVV, I have a tube linestage, and a pair of solid state Odyssey monoblock amps along with my Audio Research tube amp. I've also used a Sim Audio Moon W3 and GamuT D200 solid state with this linestage, but the solid state signature was still there, and didn't cut it for me.

Nathan, Adcom makes a preamp that does have a switch that lets you switch between solid state and tube sound.

hairofthedawg

Tube or solid state?
« Reply #128 on: 12 Feb 2003, 06:17 pm »
Jerry,

Any idea how separate the two paths in the Adcom are?  I'm wondering if when you switch to a particular sound, is the non-used section completely out of the path?  Or are those components taking a little bit away from what the used section is producing by sitting there in a static state, or maybe they are still active, just their output isn't reaching the output jack.  Kinda makes me wonder what happens to the extra inputs on my preamp that still have a signal going in when I'm listening to something else.  Doesn't sound like a good thing, but I haven't noticed it being detrimental.

cheers,

Dick

audiojerry

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Tube or solid state?
« Reply #129 on: 12 Feb 2003, 06:49 pm »
Good questions, Dick, but I don't know. I have listened to my friend's, and the two outputs do sound different with the tube version sounding smoother and softer, which we both prefer for most recordings, but not all.

DVV

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Tube or solid state?
« Reply #130 on: 12 Feb 2003, 06:52 pm »
Quote from: audiojerry
DVV, I have a tube linestage, and a pair of solid state Odyssey monoblock amps along with my Audio Research tube amp. I've also used a Sim Audio Moon W3 and GamuT D200 solid state with this linestage, but the solid state signature was still there, and didn't cut it for me.

Nathan, Adcom makes a preamp that does have a switch that lets you switch between solid state and tube sound.


Iz dis anoder kapitalist trik to get me to make an amplifier for you people? Assuming I kan do it before ze Germans get here. :P

Seriously though Jerry, I wonder what you mean by "ss signature"? Please explain so I know what we are talking about. To a man who listens mostly to tubes, as I understand is your case, I suppose any solid state device will always have that signature. After all, as far as I remember, nobody here said they ever had the same sound.

Also, I'm beginning to wonder if I should get you guys to make the legendary Otala power amp from (gulp!) 1972. The one which introduced to this world things like transient intermodulation, etc. The one which launched Electrocompaniet as a company.

I still have the schematics, so it's actually possible. 2x25/50W into 8/4 ohms, 100 V/uS slew rate, THD/IM below 0.1% with just 20 dB of negative feedback, response out to 1 MHz, etc. Shouldn't be too expensive to make, off hand about $150-200 locally.

For great sound, that's still the one to beat.

Cheers,
DVV

jw

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Tube or solid state?
« Reply #131 on: 12 Feb 2003, 07:16 pm »
I would have to agree with audiojerry about the solid state signature with some amps. Sometimes the difference between 2 solid state amps will be greater than the difference between either of them and certain tube amps. It all depends on design. JFETS,Mosfets,bipolar,NPN only, NPN & PNP together, class A, class AB,solid state, tube, hybrid, single ended, etc,etc,etc. Trying to decide which is 'correct' is a personel choice. I don't think anyone has heard every amp on the market, it would be a full time job just to try. As a(general) rule, I don't like high power, multi mosfet amps. I find the bipolar amps smoother and more refined. If I could have found a tube amp to use in my system I would have, but I do not live in a tube friendly area.Finding a way to try out audio gear is getting hard. I Use a pair of Blue circle BC 2.1 monoblocs (hybrid, class A, single ended, bipolar), which I have no desire to get rid of. As far as having a switch on your preamp, I think this would be a good way to match pre-amps and amps to each other. But I would not label them as being "tube" or "SS" sound. My pre-amp has a transformer, transformerless (direct) output switch. Even CD's sound good when I use the transformer output.

audiojerry

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Tube or solid state?
« Reply #132 on: 12 Feb 2003, 08:33 pm »
jw from Tampa - first post?
Welcome!
But be wary of Dejan - he can be very persuasive.  :wink:

Dejan, in a nutshell, for me, a solid state signature just sounds more electronic, which is a barrier that prevents me from connecting in some elusive organic way to the music.

I have only gotten this connection to the music from tubes. But I will admit that most tube amps I've listened to lack this quality as well. Maybe there are SS designs out there that can do this. God knows there are scores that I haven't tried (yet).    

We are listening to an assortment of electronic components recreating a musical event that itself was recorded via more electronic components, and most commonly stored on a digitized medium.  How we can still convince our senses that we are hearing the music as it was actually performed is a miracle because of so much electronics involved.

Tubes just seem to have the ability to sound less electronic than transistors, I guess, and that is the difference I must be hearing (or feeling with my other senses). I think we experience listening with more than our ears. I think our other senses and body must be involved in how we hear something.

My wife is a good example of being able to easily differentiate the differences between tube and solid state, and I think she is doing so with more than her ears. I have never been able to get her to listen to music with me with an SS amp for more than 10 minutes before she gets up and leaves,  even when I thought it was sounding good. When I ask her what's wrong, she is unable to describe exactly what she is experiencing, but it always comes down to the fact that it was not pleasant and she was not enjoying the music, even when listening to her favorite recordings.  When she has listened with me when using a tube amp, which is not very often anyways, she sticks around much longer, sometimes for hours. Not one to get into long winded explanations, she just says she is enjoying the music. Maybe there is some sort of threshold for her where there is just enough reduction of electronic signature that allows her to connect to the music.

And maybe that is the difference between those who prefer solid state and those who prefer tubes. Maybe there is a threshold of tolerance for electronic sound that is lower for tube lovers. It's hard to state this without making it sound like tube lovers have more refined hearing as if they were wine connoisseurs. I don't think it's that. It's like having a lower tolerance for pain, maybe. SS advocates maybe have a higher tolerance for pain that is caused somehow by a harmonic frequency range that is not necessarily audible.

I can certainly hear the areas where solid state seems to have the upper hand like dynamic drive, transient attack, better definition of low level detail.  I appreciate these qualities, and yet I still can't warm up to SS. I wish I could, really. My preference for tubes is definitely not driven by any nostalgia or fashion, or a desire to drive up my electric bill or the temperature of my room, and I'm certainly not looking forward to the eventual need of replacing all the tubes in my amp.

DVV

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Tube or solid state?
« Reply #133 on: 12 Feb 2003, 10:18 pm »
Quote from: audiojerry
jw from Tampa - first post?
Welcome!
But be wary of Dejan - he can be very persuasive.  :wink:


I can be persuasive? I don't know ... I did sell a ton of snow to an eskimo the other day, but persuasive? :mrgreen:

C'mon Jerry, JW lives in Florida, he's basking in the sun, watching the peaches on the beaches, and all I see through my window is dirty, big city grey snow.

Quote

Dejan, in a nutshell, for me, a solid state signature just sounds more electronic, which is a barrier that prevents me from connecting in some elusive organic way to the music.

I have only gotten this connection to the music from tubes. But I will admit that most tube amps I've listened to lack this quality as well. Maybe there are SS designs out there that can do this. God knows there are scores that I haven't tried (yet).    


All agreed, Jerry, I think I know what you mean. For me too, looking for the emotion in the music, for the motive of the author to write the music, is everything. If I can't glimpse it at the very least, I'm wasting my time. Point is, we all have this or that we will not give up.

Quote

We are listening to an assortment of electronic components recreating a musical event that itself was recorded via more electronic components, and most commonly stored on a digitized medium.  How we can still convince our senses that we are hearing the music as it was actually performed is a miracle because of so much electronics involved.


Let's not overdo it now, shall we? True, much electronics is involved, and true it can and usually does get in the way, but let me ask you this: the CD I sent you, Hevia, is a copy of a copy, yet did it strike you emotionally in any way? Did it move you in some small way, entice you to listen to it some more?

Of course it would have done even more so if you had an original, which would surely sound better, but still, it's the essence we are (or should be) after, the rest is just packaging.

Quote

Tubes just seem to have the ability to sound less electronic than transistors, I guess, and that is the difference I must be hearing (or feeling with my other senses). I think we experience listening with more than our ears. I think our other senses and body must be involved in how we hear something.

My wife is a good example of being able to easily differentiate the differences between tube and solid state, and I think she is doing so with more than her ears. I have never been able to get her to listen to music with me with an SS amp for more than 10 minutes before she gets up and leaves,  even when I thought it was sounding good. When I ask her what's wrong, she is unable to describe exactly what she is experiencing, but it always comes down to the fact that it was not pleasant and she was not enjoying the music, even when listening to her favorite recordings.  When she has listened with me when using a tube amp, which is not very often anyways, she sticks around much longer, sometimes for hours. Not one to get into long winded explanations, she just says she is enjoying the music. Maybe there is some sort of threshold for her where there is just enough reduction of electronic signature that allows her to connect to the music.


Your good wife merely underlines a simple fact - we all hear differently, each in his own way and with much more than our ears. That neither you nor I can explain exactly why shows how really little is known about psycho-acoustics, and unfortunately so.

Quote

And maybe that is the difference between those who prefer solid state and those who prefer tubes. Maybe there is a threshold of tolerance for electronic sound that is lower for tube lovers. It's hard to state this without making it sound like tube lovers have more refined hearing as if they were wine connoisseurs. I don't think it's that. It's like having a lower tolerance for pain, maybe. SS advocates maybe have a higher tolerance for pain that is caused somehow by a harmonic frequency range that is not necessarily audible.

I can certainly hear the areas where solid state seems to have the upper hand like dynamic drive, transient attack, better definition of low level detail.  I appreciate these qualities, and yet I still can't warm up to SS. I wish I could, really. My preference for tubes is definitely not driven by any nostalgia or fashion, or a desire to drive up my electric bill or the temperature of my room, and I'm certainly not looking forward to the eventual need of replacing all the tubes in my amp.


Points taken, Jerry. Although I must say, there's really no need to explain, so I take the above as a search for the elusive explanation of what it is that moves us.

As you have surely realized, in many ways I am the opposite. To me, tubes sound mellow and can have refinement as few others, but they always fail me on rhythm, speed and attack. It's not that they don't have, it's simply that equivalent quality SS has it better and more.

Cheers,
DVV

nathanm

Tube or solid state?
« Reply #134 on: 13 Feb 2003, 02:40 am »
The only thing that ultimately moves anyone is good songwriting and good performance.  We all knew that before we knew about equipment.  Before the tape mechanism stopped working I got way more enjoyment out of my semi-crappy car stereo than my home system.  Fidelity-wise it was a train wreck; an average 70db noise floor in there I measured today!  Sheesh!  One of the rear surrounds was partially eaten away by the sun.  But it didn't matter, the song pervades all.  It's like 90% songwriting and 10% equipment.  When the balance tips the other way your brain has shifted gears and is seeking satisfaction in sound and not music.  It's a matter of where your point of reference is.

DVV

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Tube or solid state?
« Reply #135 on: 13 Feb 2003, 07:35 am »
Quote from: nathanm
The only thing that ultimately moves anyone is good songwriting and good performance.  We all knew that before we knew about equipment.  Before the tape mechanism stopped working I got way more enjoyment out of my semi-crappy car stereo than my home system.  Fidelity-wise it was a train wreck; an average 70db noise floor in there I measured today!  Sheesh!  One of the rear surrounds was partially eaten away by the sun.  But it didn't matter, the song pervades all.  It's like 90% songwriting and 10% equipment.  When the balance tips the other way your brain has shifted gears and is seeking satisfaction in sound and not music.  It's a matter of where your point of reference is.


This is why I keep saying brother Nate - 100% agreed, though I never installed any sound in my car, the engine plays nice tunes all by itself. :P

Cheers,
DVV

Ravi

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Tube or solid state?
« Reply #136 on: 13 Feb 2003, 08:31 am »
Here is my 2 cents.  If all recordings were perfect quality, then SS would be the best.  No one can question their technically more accurate response as compared to tubes.  They have alarmingly low distortion, and can render the high frequency ranges with less distortion than most tube amps.   Tube amps generally start to have rising distortion anywhere from 1 to 15khz.

However, in our grim reality, most recordings are sterile, flat, and lifeless. In this reality, a tube amp can round the edges of these crappy recordings, and save our ears from the impending fatigue.

I really love the way a great SS design sounds on the best of the best recordings, but its all too rare.  It seems that the majority of stuff is rendered too accurately, with warts and all, making them unlistenable.

JohnR

Tube or solid state?
« Reply #137 on: 13 Feb 2003, 08:44 am »
Quote
No one can question their technically more accurate response as compared to tubes


I can. What it boils down to is that the "accurate" response that gets trotted out in statements like this are not what is relevant with respect to what our ears hear. Hey, why don't *I* say it for a change, check Dan Banquer's FAQ ;-)

JohnR

Jay S

Tube or solid state?
« Reply #138 on: 13 Feb 2003, 09:13 am »
Quote from: DVV
This is why I keep saying brother Nate - 100% agreed, though I never installed any sound in my car, the engine plays nice tunes all by itself. :P


Don't forget the exhaust!  I loved the symphony of induction roar, singing valvetrain and exhaust burble of the car I gave up before coming to Hong Kong.  Its song - starting off with a baritone burble rising through a throaty full chesty roar into a tenor wail - as it raced to its redline would raise the hairs at the back of my neck more readily than most home audio systems!  No vibration, no strain, just effortless power and glorious music.  Yup, like a good home audio system!

nathanm

Tube or solid state?
« Reply #139 on: 13 Feb 2003, 04:01 pm »
Quote from: Jay S
Don't forget the exhaust!  I loved the symphony of induction roar, singing valvetrain and exhaust burble of the car I gave up before coming to Hong Kong.  Its song - starting off with a baritone burble rising through a throaty full chesty roar into a tenor wail - as it raced to its redline would raise the hairs at the back of my neck more readily than most home audio systems!  No vibration, no strain, just effortless power and glorious music.  Yup, like a good home audio system!


If my car was a song it would come to a dramatic silence at every stoplight, only to rise again in a whirring crescendo.  A Honda Insight...alas, even more expensive than those solid state amps that you need a crane to move.  Maybe I will set up a PayPal Donation link on my website... :( The Insight is kinda like a giant horn system; you can run it with a 2 watt SET amp.  Heh!