Sujet Ca souffle !

Citation : TekZen, c'est la que tu me manques... snif... !

Citation : Re: Comparison of stock 12AX7 vs. JJ ECC83S Tubes

Thanks a lot for sharing this!

I've replaced my ESX tubes with a set of balanced JJ ECC803S GoldPins (which
accoording
to the forums are a little smoother due to a longer tube, and the goldpins are a
bit more
quiet)... massive difference for the better! almost no distortion: just smooth
warm tube-
sound...! Just ordered another set for my EMX...

TIP: Replace those Tubes!!!

Great samples by the way! Well done; you convinced me to replace them!

--- In electribe@yahoogroups.com, Scott Solmonson <scosol@...> wrote:
>
> Wow that JJs don't even distort at all to my ears- that's no fun!
>
>
> On Oct 25, 2008, at 12:16 PM, brainztain wrote:
>
> > Very good information here, I wonder why nobody has commented on this.
> > I'll listen to these samples as soon as I get some time. One
> > question: which tubes did YOU like more?
> >
> >
> > --- In electribe@yahoogroups.com, Tarekith <Tarekith@> wrote:
> >>
> >> I wanted to create a quick and simple test to see how much of an
> >> audible difference replacing the tubes in my new Korg EMX-1 would
> >> make. After looking into what tubes to replace the stock 12AX7 tubes
> >> with, I decided on a pair of matched triode JJ ECC83S which I bought
> >> from Eurotubes.com:
> >>
> >>
> > https://ssl.eurotubes.com/cart/index.php?
page=view_products&category_id=2&sub_category_id=12
> >>
> >> I wanted to see how much difference there would be in level (volume)
> >> between the tube types, as well how much the distortion varied as
> >> well. The first thing I did was create a simple 1 bar pattern with a
> >> held sine wav to measure the output of the EMX using the stock tubes.
> >> The EMX-1 main outs were then routed to the inputs of my MOTU
> >> Ultralite soundcard, and I used Ableton Live 7.07 and the plug in
> >> Inspector XL from EAS to measure the levels. Inspector XL was set to
> >> use the K-14 meter scale, which is my preferred metering scale. I
> >> recorded the RMS meter readings at 5 difference positions of the Tube
> >> Gain knob on the EMX-1, based on the picture below:
> >>
> >> http://img180.imageshack.us/img180/655/knobpositionshj0.jpg
> >>
> >> Here are the readings I obtained with the stock Korg tubes:
> >>
> >> Knob Position 0 = -11.30dB
> >> Knob Position 2 = -9.50dB
> >> Knob Position Half = -0.55dB
> >> Knob Position 8 = 3.67dB
> >> Knob Position Full = 3.93dB
> >>
> >> Here are the readings I obtained with the JJ ECC83S tubes after the
> > swap:
> >>
> >> Knob Position 0 = -17.20dB
> >> Knob Position 2 = -15.80dB
> >> Knob Position Half = -6.49dB
> >> Knob Position 8 = -2.22dB
> >> Knob Position Full = -2.00dB
> >>
> >> As you can see, the JJ tubes are quieter by roughly 5-6dB at all knob
> >> positions. Next to the tubes in the EMX-1 are pots to adjust the
> >> output levels of each tube, but there was not enough range to
> >> successfully match the levels of the two tube types, so be aware that
> >> swapping your tubes will potentially lower the output level of your
> >> EMX-1.
> >>
> >> My next step was to record audio examples of the two tubes in action
> >> so people could hear the differences with a more real-world example.
> >> For this test, I used an 8 bar EMX-1 pattern from my last song,
> >> "Puled" which you can read about here:
> >>
> >>
> > http://www.korgforums.com/forum/phpBB2/viewtopic.php?
t=34960&sid=c13653a926bd0c04f5fa21b9714a869b
> >>
> >> I recorded 8 bars of audio from the EMX-1 into Ableton Live 7.07
> >> using
> >> the same Tube Gain settings listed above. Live was set to record
> >> 24bit/44.1kHz wav files, and these were then converted to 320kbps
> >> MP3's once I was done to save on traffic on my site. I think even
> >> the
> >> MP3's make the differences plain to hear, so likely nothing would
> >> have
> >> been gained anyway by posting wav file formats. Here's the audio
> >> examples:
> >>
> >> Knob Position 0:
> >>
> >> http://tarekith.com/mp3s/01_Stock_Tubes_0.mp3
> >>
> >> http://tarekith.com/mp3s/02_ECC83S_Tubes_0.mp3
> >>
> >> Knob Position 2:
> >>
> >> http://tarekith.com/mp3s/03_Stock_Tubes_2.mp3
> >>
> >> http://tarekith.com/mp3s/04_ECC83S_Tubes_2.mp3
> >>
> >> Knob Position Half:
> >>
> >> http://tarekith.com/mp3s/05_Stock_Tubes_Half.mp3
> >>
> >> http://tarekith.com/mp3s/06_ECC83S_Tubes_Half.mp3
> >>
> >> Knob Position 8:
> >>
> >> http://tarekith.com/mp3s/07_Stock_Tubes_8.mp3
> >>
> >> http://tarekith.com/mp3s/08_ECC83S_Tubes_8.mp3
> >>
> >> Knob Position Full:
> >>
> >> http://tarekith.com/mp3s/09_Stock_Tubes_Full.mp3
> >>
> >> http://tarekith.com/mp3s/10_ECC83S_Tubes_Full.mp3
> >>
> >> As you can hear, not only are the stock tubes louder, but they also
> >> distort much more at higher Tube Gain settings on the EMX-1. As to
> >> which tube type is better, I'll leave that for you to decide, as it
> >> really depends on how you use the tubes and the sound you personally
> >> prefer.
> >>
> >> Hope this was helpful to people. Thanks for taking the time to
> >> listen,
> >> and feel free to let me know if you have any questions on the testing
> >> I did.
> >> --
> >> Tarekith
> >> http://tarekith.com
> >>