Tubes

[smithbasses]

I have a Ampeg SVT 6 PRO and i am wanting to upgrade my tube but i just dont know which one would sound best? In it now are 12AX7 groove tubes and 12AU7 electro-harmic. I know those tubes are not that good they were in it when i bought it and i tried some tung-sol and JJ tesla tubes and they made my bass amp sound like a guitar amp! Does anybody have a SVT 6 PRO? If so what tubes do you have in it or if you have any suggestions on tubes i would like to hear them!

Thanks!

[gumtownbassman]

tried the chinese Marshall tubes? strange as it seems, they do add a bit of grit to the sound.
No harm in trying them..
Your existing preamp tubes should last you at least 25 years.

[JimmyM]

there are tons of tubes these days...from new ones to new old stock classics. it's all a matter of trying a handful and finding ones you like.

but don't sell groove tubes and ehx tubes short. if they work and the amp sounds good to you, the brand is immaterial.

[RickenBoogie]

I owned a 6Pro for several years, and ran with whatever Ampeg put in at the factory. There are a total of 6 tubes in that amp, 3 or 4 for the preamp, and 2 or 3 for the driver stage. No way of knowing what will sound best, until you've tried everything, but for my money, they sound great stock.

[stiles72]

I've swapped the stock Sovtek tubes out of my 3-Pros with Tung Sols, JJ's, etc... and honestly don't really notice that big of difference. If anything, I think the stock Sovteks sounded the best.