Preamp Tonekit 12AX7 (6)


Availability: In stock

Quick Overview

Tone Kit with 6 12AX7's

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New upgraded tone kit.

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  • NOS Bejing 12AX7
  • New upgraded tone kit.


This is a the "6 12AX7" version of the Doug's Tubes preamp tube cocktail kit and we've received great feedback on it. We have upgraded all preamp tone kits with Mullard over the Tung-Sol. There has been a supply disruption for chinese tubes, the Shuguang factory closed a year ago with no ETA for going back online. Ruby branded chinese AC5's are unavailable except for what is left in the retail supply channel so we have sourced original 2014 Shuguang 12AX7B's which are identical to the Ruby AC5 and screen them ourselves. The tonekit allows hi-fi and guitarists alike to experiment and "tube-roll" preamp tubes in different slots of their amp. We are now using the factory direct Shuguang 12AX7B in place of the Ruby AC5HG(same tube) Substitute the V2 JJ with the NOS Chinese(foil getter) 12AX7 from Beijing for a some amazing tone. Currently we're recommending the following:

V1 - Mullard CV4004

V2 - JJ ECC83

V3 - Shuguang 12AX7B

V4 - Shuguang 12AX7B

V5 - Shuguang 12AX7B

V6 - Mullard 12AX7

Customer Reviews

Mesa Boogie Mark V 35 Combo retube Review by Mike
Hello Doug, I just wanted to send you a quick note and Thank You for selecting the perfect set of tubes for my amp. I replaced my five year old tubes yesterday and my amp sounds as good if not better than the day I bought it.

Happy customer… (Posted on 5/12/20)
Mesa Boogie Dual Rectifier Roadster full retube Review by Cameron
Played the amp last night for several hours after changing the tubes. I just wanted to thank you for putting together a great tube swap for a great amplifier. My Mesa Roadster sounds fantastic! It is very quite and has a very pure tone. I was able to really dial back on the gain and get some amazing tones with less noise. I'll be honest, I was a little hesitant to order non-Mesa tubes, but I'm glad I did! The reviews on forums and on your website can be believed and I'll order from you in the future. Thanks!

Cameron (Posted on 12/21/14)
Mesa Boogie Roadster head Review by Chris
Hi Doug

Recently I received your mesa/boogie tone kit (6) for my Roadster head, since have replaced with your recommended tone kit and it sounds really good, in fact its awesome, its like it has a new lease of life so thank you.

Chris (Posted on 4/18/13)
Peavey 6505+ Review by Simon
Thank you very much,
I installed my new tubes yesterday
Awesome, exactly what I was looking for!
Sound really great!

Best regards

Simon Guénette (Posted on 2/21/13)
Egnater Renegade retube(Ruby 6L6GCMSTR, Ruby EL34BSTR, 6 x 12AX7 tone kit) Review by Asa
The tonekit preamp tubes and the recomended power tubes sound amazing. I can't thank you guys enough. (Posted on 1/28/13)
Great tone! Review by Olivier
works well on my Mesa Roadking 2 with matched and balanced phase inverter option. Amazing sound!!! (Posted on 12/7/12)

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