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Which tubes for ART Pro VLA II tube replacement?
Old 18th January 2018
  #1
Gear Head
Which tubes for ART Pro VLA II tube replacement?

Hi folks,

a friend owns an Art Pro VLA II that he doesnt´t use anymore, so he will give it to me for free the next days. I love the modulation behaviour of the device but I don´t like the chinese stock tube´s sound very much. Therefore I plan to replace the tubes.

I will use the compressor mainly in the mixing stage for bass (synth and e-bass), synth pads and vocals. I´m producing Hiphop and House, so I like to achieve a warm, creamy sound, that shines thru in the mix, but especially on vocals, is not too sibliant.

The tubes used are 12AT7 / ECC83
Which tubes manufacturer would you recommend for my purpose?

Thank you
Old 18th January 2018
  #2
Lives for gear
 

I have one of their small units and I tried out at least a dozen different brands of tubes both current and vintage.
The one that stood out head and shoulders above all the others was an Electro Harmonix. It was louder, clearer and definitely opened up the top and to get some sparkle up top. Those Art units sound a tad muddy with the stock Chinese tubes they have in them. That EH made a big difference.

Just be careful when you put one in. The tab at the top of the tube is slightly longer then others. I didn't notice that when I installed it and when I put the cover back on and tightened it the tab was wedged over the top of another component and it would up getting snapped off. In my case I would have moved that component out of the way to make room if I had seen it.

The EH tubes are very low noise too which is important in a mic preamp.
As an alternative you might want to try an Tung Sol or Mullard, but I'd still choose the EH on the Art stuff. It seems to have what those preamps need most.
Old 18th January 2018
  #3
Gear Guru
 
Karloff70's Avatar
 

When I very briefly had one I tried the Kenetek mod and also tried quite a few tubes in it. They do make a difference, but don't expect massive differences I'd say. I quickly sold it on in the end. It has a sound that neither different tubes or even the transformer mod could overrule and you either like it/find it useful or not.
Old 18th January 2018
  #4
Gear Head
Quote:
Originally Posted by wrgkmc View Post
The one that stood out head and shoulders above all the others was an Electro Harmonix. It was louder, clearer and definitely opened up the top and to get some sparkle up top.
Can you tell, which EH model you use? Currently there are 4 different ones:
12AX7 EH, 12AY7, 12AU7 EH and 12AT7 EH
Old 18th January 2018
  #5
Gear Guru
 
Karloff70's Avatar
 

Quote:
Originally Posted by danibert View Post
Can you tell, which EH model you use? Currently there are 4 different ones:
12AX7 EH, 12AY7, 12AU7 EH and 12AT7 EH
They would all work, just different gain amounts.
Old 19th January 2018
  #6
Gear Head
Is there no difference in overall sound between 12AX7 EH, 12AY7, 12AU7 EH and 12AT of the same manufacturer?

Do the have to be matched?
On a website I read, that it´s not that important for ECC83 / 12AX7 of the same manufacturer and model.

And what does matched exactly mean?
Is it the gain? Or frequency response? Or something else?
Old 19th January 2018
  #7
Deleted 3cb98a6
Guest
No. They don.t have to be matched

For the best transparence i would have to advise NOS or plain old stock Philips miniwatts/Mullard or TFK.

If it has 12 AT7 in there, then stick to AT7. Do not install AX instead!
Old 19th January 2018
  #8
Gear Guru
 
Karloff70's Avatar
 

Quote:
Originally Posted by pief View Post

If it has 12 au7 in there, then stick to Au7. Nothing else.
You'd be surprised how little difference 12anythings to different gain 12somethingelses make in there.
Old 8th December 2019
  #9
Here for the gear
 

I totally disagree with that statement . I put NOS Sylvania "Red Letter" in both units and I have more control and higher gain in the makeup gain. It has 12 AT7's in the unit.

Last edited by musicfirst234; 8th December 2019 at 01:53 AM.. Reason: syntax error
Old 8th December 2019
  #10
Here for the gear
 

I do not know exactly what thread it came up that these unit are not transparent. I beg to differ. I get absolutely no distortion artifacts from this compressor with the American Made tubes.It sound clear and clean and it also adds the even harmonics as it should using the tubes for opto coupling. Save your money on any other mods because it is very useful for tracking vocals. That is what I use them for. I use a DBX rack for drums and acoustic guitars.
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