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Old 17th July 2013, 11:15 PM   #201
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I have to agree being around since the time that Mesa started that the only complaint that I ever heard was they were to clean for rock and roll, more of a jazz amp at least in the beginning. For instrumentation there is no substitute for the sound of a tube amp unless you want to use emulation on a solid state amp and why would you do that?

This was the same problem I ran into years ago making speakers and horns for PA thinking I could get guys to use them for guitar, way to clean, none of the overtones that are what makes electric guitar and bass sound how we expect. Without the distortion and overtones it just doesn't have the musical sound we have learned to expect as normal.

I just feel sorry for whoever has to move that amp, I wouldn't want to be your roady that is for sure!
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Old 17th July 2013, 11:21 PM   #202
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I am a sound engineer and electronics engineer also over 60 so I agree, far too heavy for me. I get my roadies to move the gear and give the band the sound they request plus a few good ideas.
I have in the past however, placed the SM57 in front of the Boogie but not plugged it in. They don't waste energy with class A and heat, it all goes through the large magnet high SPL speaker!
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Old 18th July 2013, 08:16 AM   #203
kimbal is offline kimbal  Australia
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I encourage anyone who has the technical skill and the finances to build tube amps irrespective of the size and design.
It keeps the tube and transformer industry going and the field of research ongoing.
As for big amps - it's such that they are often built by the serious constructor who has the capability to both design and if need be wind their own transformers. These specialist amps often do not have off the shelf transformers, so one is left to wind their own.

An example of the type of thing I'm talking about is John Chambino's website where he builds big bass guitar amps with tubes. Here is a 1000 watt Amp using twenty 807 tubes with his own designed power and output transformers > http://www.chambonino.com/construct/const13.html

Today many take the lazy way out, by skimping on transformers, and design exercise by buying off the shelf - or building solid state or hybrid instead.
This is not wrong for some situations - but it does kill any sort of incentive to build something unique with tubes.
By designing a new tube amp, one may rediscover something that was missed by others !
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Old 18th July 2013, 04:46 PM   #204
ChrisA is offline ChrisA  United States
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Originally Posted by funk1980 View Post
Totally depends on what 'sound' you're looking for in an amp. There's not a single right amount of THD (or frequency response, etc.) that will satisfy every player. I like mine a bit more clean

You like what kind of amplifier more clean? Are you talking about HiFi stereo, guitar amps or bass amps?

This is the musical instruments amp section of the forum. So frequency responce is kind of defined by the instrument. For example a standard tuned guitar only makes sound down to 80Hz and pretty much there is nothing above 8KHz, or 10K if you like fret noise

HiFi stereo is a completely different thing. THere you want a very clean amp with a wide bandwidth. Well, even there some people like the "tube sound" which of course is a kind of distortion
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Old 18th July 2013, 05:00 PM   #205
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You like what kind of amplifier more clean? Are you talking about HiFi stereo, guitar amps or bass amps?
I like my bass amp relatively clean. Not to much dirt from e.g. overdriven tubes or various add-on filters. I'm more of a MarkBass than an Orange kind of guy so to speak. Although I do like them even harmonics to liven things up a bit.

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This is the musical instruments amp section of the forum.
Duh

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Frequency response is kind of defined by the instrument. For example a standard tuned guitar only makes sound down to 80Hz and pretty much there is nothing above 8KHz, or 10K if you like fret noise
Frequency response is DEFINITELY not just defined by the instrument. Otherwise every amp would sound the same(?). Besides the fact that instrument-amps have different low- and highpass responses, frequency response also entails the curvature of the response within this spectrum.

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HiFi stereo is a completely different thing. THere you want a very clean amp with a wide bandwidth. Well, even there some people like the "tube sound" which of course is a kind of distortion
I think we all know what HiFi means
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Old 18th July 2013, 05:18 PM   #206
ChrisA is offline ChrisA  United States
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Originally Posted by funk1980 View Post
I like my bass amp relatively clean. Not to much dirt from e.g. overdriven tubes or various add-on filters. I'm more of a MarkBass than an Orange kind of guy so to speak. Although I do like them even harmonics to liven things up a bit.
...
Have you measured THD in one of your clean amps? Just curious. I've seen some numbers for guitar amps that sound very clean, used by people playing "smooth jazz" and they measured THD is surprisingly high, 10% at the lowest. Just wondering what yours might be.
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Old 18th July 2013, 10:07 PM   #207
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Have you measured THD in one of your clean amps? Just curious. I've seen some numbers for guitar amps that sound very clean, used by people playing "smooth jazz" and they measured THD is surprisingly high, 10% at the lowest. Just wondering what yours might be.
I don't have the exact numbers, but I do remember the first even harmonic being way lower than -20dB below the base signal. You keep mentioning guitar, but FWIW I do look at guitar- and bass amps as two different tonal approaches.
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Old 18th July 2013, 11:33 PM   #208
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Have you measured THD in one of your clean amps? Just curious. I've seen some numbers for guitar amps that sound very clean, used by people playing "smooth jazz" and they measured THD is surprisingly high, 10% at the lowest. Just wondering what yours might be.
My DIY bass preamps measure at well under 0.1% for the solid state ones and 0.5-2% for the tube ones. I use PA grade power amps kept well under audible clipping at all times. Speakers are another story though, of course.
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Old 3rd August 2013, 03:28 AM   #209
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Anybody want to do a doubler for about 600V?

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Old 3rd August 2013, 04:08 AM   #210
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Anybody want to do a doubler for about 600V?

I had similar thoughts.
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