Well I have posted this in a couple of places.. but I feel that it belongs here too since I found this thread!
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I tried a few different tubes in the pre amp. Settled on NOS Raytheon 5751's (iirc) in V1 & 2 . Seemed to give a slightly rounder, gruntier drive when that channel (OD) was pushed.
I've not tried any other power tubes.
I have not made it all the way through this thread.. but I have to ask.. have any of you all done or know of others having done any tube rolling with these amps.. tried Telefunkens?
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I compared a few a while back and made a soundclip of them:
A comparison of various pre-amp tubes in a Fender SB300.
On the SB300.... yes, correct.I presume that you were using the second channel.
If you look down below the blue box on the page you'll see: 1. OEM tube 100% gain 2. Tungsol 100% 3. Tube Store 100% 4,5,6. (repeat) 7. OEM 50% 8. Tungsol 50% 9. Tube Store 50% 10,11,12 (repeat). They were the three I had on hand that were tested. I recorded four bars of the riff for each change from memory. All settings were left untouched for the recording process.(which ones did you use?)
I only tested the OD sounds, at that stage I wasn't interested in clean comparisons, sorry.When you tested the different tubes how much if any noticeable difference was there in the clean mode either on channel one or two?
You're welcome!Oh and thank you sir for posted that link too!
On the SB300.... yes, correct.
The process was:
1. I recorded it on my digital multi-track recorder flicking between channels for the final "mix".
So, in other words, I first recorded a dry loop in my Zoom B3 and left it playing.
2. I then recorded the first tube's sound on Channel 1 in my Zoom R24.
3. I then swapped the tube and "re-wound" the recorder to record the second tube's sound on Channel 2 in the Zoom.
(etc. for the third tube.)
4. I then played the recording back, flicking between each Channel as I recorded the master (what you are hearing) externally.
If you look down below the blue box on the page you'll see: 1. OEM tube 100% gain 2. Tungsol 100% 3. Tube Store 100% 4,5,6. (repeat) 7. OEM 50% 8. Tungsol 50% 9. Tube Store 50% 10,11,12 (repeat). They were the three I had on hand that were tested. I recorded four bars of the riff for each change from memory. All settings were left untouched for the recording process.
I only tested the OD sounds, at that stage I wasn't interested in clean comparisons, sorry.
You're welcome!
Been a very worthy start to the year, but coming in to a run of gigs as of this weekend. Looking forward to getting the SB300 firing! Haven't decided on either the 610 or 410 Neo yet!
I gotta gig tonight. ..it'll be the SB300 & either my NV412 or my 2 Fender Bassman Pro Neo 115s. Decisions decisions.......
That said. .. I do love pushing the Super Bassman into just the one 115 coz I can actually PUSH the power tubes a bit more.
What cha all reckon???,?
And you are welcome sir!~Thanx @99Z3 I WANNA be influenced. That's the whole point.
Thanks for your reply.![]()




The rig for last night.
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My side of stage
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Looking out into room. (Love playing this room. .. it was built in the early 50s, so lots of carpet, staggered ceilings and curved walls. ...= great sound in there)
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Super Bassman & 2 Fender Bassman Pro Neo 115 cabs
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Was a great gig. Crowd loved it. Bass rig sounded phenomenal! Thick, solid n punchy. None better. ....imo of course.![]()
I usually forget to take gig pics but remembered at sound check yesterday.
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Foyer leading into the function room.
Moving in. ... the Bassman Pro Neo 115s make ok carts for our old JBL 115s
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My roadie (sax player really)
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