just about anything in the preamp will make it less dark...JJs are dark

i know a few people that like the JJs in the power section of a 5150 though most people go with a Chinese valve in V1 and V5...then Sovtek or Electro-Harmonix in 3, 4, and 5. I liked Shuguangs in the XXX preamp...but ended up going back to JJs because the XXX is so bright anyway...darker sounding preamp tubes help even that out. I have limited experience with new Tungsols...the only ones I've used are ones that have came stock in my amps and have been in need of replacement.
Last edited by eyebanez333 at Sep 20, 2010,
JJ ecc83,s are high gain. You should go with tungsol or sovtek lps in that amp.
Shuguangs work great in just about everything. It's even better that they're the cheapest preamp tubes you can buy in most cases
Quote by Dave_Mc
I've had tube amps for a while now, but never actually had any go down on me
Quote by jj1565
maybe you're not saying the right things? an amp likes to know you care.

V1 - Tung-Sol
V2 - Penta 12ax7
V3 - Shuguang 12AX7 9th gen.
V4 - Shuguang 12AX7 9th gen.
V5 - Shuguang 12AX7 9th gen.

Trust me.

Winged C, TAD, or Rubys in the power section are amazing.

All balanced tubes, gold pins, ect are all bull shit snake oil in guitar tube amps. Balanced tubes only make a different in really high quality hifi stereos.
Ibanez UV777P
Ibanez RGD2127FX
Ibanez RG3120TW
Ibanez RGD7321
Ibanez RG6003FM
Ibanez SA160
Jackson Slatxmg3-7
Baron Custom Amps K88
Rivera Knucklehead TRE
Fryette Sig: X
Randall RM4 /w Modded modules
Mesa 4x12
Bogner 4x12
Peavey 4x12(K85s)
Last edited by kylendm at Sep 20, 2010,
Seconding TAD power tubes. Would also recommend a Sovtek 12AX7LPS in V5.
Quote by DeathByDestroyr
What the hell is a G&L.

Quote by Flux'D
Gay & Lesbian I think, the box smelled funny
Greg what did you send me??
This info might by helpful...


Originally Posted by Steve Fryette at vhtusers.com
Hi guys,

Regarding the difference between the China 12AX7s we use in production and the so-called C9 or 9th generation 12AX7, our position is that there is none other than the normal progression towards continuing improvements in quality which is always ongoing. Hence the tubes we use are the same as those designated by others as C9. None of the suppliers we use can confirm or verify that this is anything more that creative marketing on the part of some 3rd tier tube resellers.

Most likely any difference you may hear would be attributed to either normal performance variations from one production run to the next, or just the difference between a fresh tube and one with a bit of mileage on it.

I'm still prodding our suppliers to do their own research, and will post an update as soon as I get more information. Until then, our position that this claim lacks substantive documentation stands.

Based on the most recent production batches of preamp tubes we evaluated, we will continue to ship our amplifiers with the same tube complement that we have been using all along:
V1 stage: 12AX7WB or V1 grade Selected Shuguang 12AX7A
All other 12AX7 positions: Low Noise Selected Shuguang 12AX7A
All 12AU7 or 12AT7 applications: Shuguang 12AU7 or 12AT7
Valvulator 1: 12AX7WB or JJ12AX7/ECC83
GP3 V1 and V2: 12AX7WB.
GP3 All other 12AX7 positions: Low Noise Selected Shuguang 12AX7A
Power amps: Low Noise Selected Shuguang 12AX7A and 12AU7.

Recently evaluated tubes:

12AX7A/7025 Shuguang - Well balanced tonal spectrum, low noise with moderate microphonic tendencies, easily selected out in production. Excellent for clean and overdrive sounds.

12AX7WB Sovtek - Lower gain, somewhat less bass response, and not as bright as Shuguang, but not dull sounding. Very low microphonic tendencies.

12AX7A Tung-Sol - Very good gain and low microphonics. Nice low end. Somewhat forward in the upper mids. Basically a fatter higher gain EH 12AX7. Appears to be an EH with a different getter.

12AX7 EH - Very good gain and low microphonics. Less low end than Tung-Sol and not as smooth on top. More pronounced in the upper mids.

12AX7LPS Sovtek - Similar to the EH but generally a little less of everything. Nice balance and a good alternative to the Shuguang if you like less top and a little more mid.

12AX7/ECC83 JJ - Works well in Valvulator 1, which was surprising, since it did not fare as well in prior testing. Apparently the hum and microphonic issues have been addressed. A little darker sounding than the WB. When used in the amplifier V1 stage, this tube performs similarly to the WB, but the mids are more pronounced, the top end is dullish and overall somewhat harsh sounding for high gain settings.

Hope you find this useful...

Last edited by BurstBucker Pro at Sep 21, 2010,
JJ Power tubes sound best when the amp is biased hotter than stock 5150's can be.
Tastes like chicken, if chicken was a candy.