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Fender Super Twin Bass Head

#241
I just went with 3 matched pairs when I got mine. They replaced a sextet of 6L6GC-STR's. The amp sounded and worked fine without any bias adjustment. Techs here will say you should re-bias the amp after the retube to the 7581a's. What my tech and I found was the bias settings for the 6L6's was just a bit on the cool side for the 7581a's. We did readjust the bias more to the mid range of the scale for the hotter 7581a's. All of this was pretty subtle as far as the impact to the tone of the amp.

glad you are enjoying your new ST. I run mine through a 2x15 loaded with Faital 15PR400's as well - built by LDS. I also really like it through my Berg NV610 (sealed 610, no tweet).
Great amps.
 
#243
well, I think the original combo cab was a 1x15 (at least it is for the Studio Bass), so I'm not sure just putting any old 2 12's in it would be the way to go. There is quite a bit that goes into cab/driver matching. So, unless you just want to roll the sonic dice, you should probably spend at least a little time trying to get drivers that will compliment the cab.
good luck
 
#246
redstrand said:
I was asking so that I could get more appropriate speakers, I also could have someone local mod the back to be closed too at a nominal cost
Click to expand...

The head needs the ventilation and the cab will most likely be too small to work well anyway. Just build a head case and a separate cab, IMHO. Link Removed
 
#249
Passinwind said:
Beyond that, the head part is already plenty heavy enough on its own without adding two twelves to the party.
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one of the big complaints about the original combo's (Super Twins and Studio Bass) is that they are top heavy and prone to tipping over.
the amp I bought was already separated into a headcase, but it clearly showed input jack and faceplate damage consistent with a heavy amp falling over with stuff plugged into it. :eek:
it was not hard to repair though, and now it looks like new (at least for a 37 year old amp) :thumbsup:

FWIW, my Studio Bass head in a Mojo tone headcase weighs in at about 43lbs. Not bad considering all the heavy iron in there.
 
#251
So, I've read that some of you put a fan in your ST's/SB's. I've ordered the Mojotone headcase for my ST. Do I need to install a fan?

I'm also interested in hearing what you guys think about the 12AX7 and the 7025's in the amp? Do you actually use different tubes for those positions?

Thanks!!
 
#252
I put my Super Twin Head in Fender PA 100 head cabinet which has heaps of room to mount a fan.

Replaced the output trani with the Mercury Magnetics Studio Bass replacement(FSTB-OM) which gives both a 4 & 8 ohm output option.

I use these speaker array options.

1. 2 x 12” EVM12L in an open back type cabinet wired in parallel to give 4 ohms.

2. 4 x 10” EVM10L in an open back type cabinet wired in series/parallel to give 8 ohms.

I use these rigs for either bass or guitar.
 
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#253
Peter T said:
I put my Super Twin Head in Fender PA 100 head cabinet which has heaps of room to mount a fan.

Replaced the output trani with the Mercury Magnetics Studio Bass replacement(FSTB-OM) which gives both a 4 & 8 ohm output option.
Click to expand...

Great! Thanks! My ST is getting a full service by my tech now, and he will try to fit a fan in there as well. Hm, interesting to know you can get an OT that does both 4 and 8 ohms. Might have to get one in the future.
 
#255
rodl2005 said:
Must be a few. ... my Fender Super Bassman does 8/4/2 ohms, as does my Ampeg V4B 8 or 4 or 2 ohms.
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Yes, absolutely! I meant specifically the Super Twin, which only does 4 ohms (at least on paper). Also, the Studio Bass does only 8 ohms (again on paper). With the replacement OT you get the ability to choose between 4 and 8 ohms in either of those two amps, making them more flexible in terms of speaker loads. But then again, their ability to drive a different load than specified has already been covered earlier in this thread. :)
 
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#256
Alriiighty then, it's showtime:bassist::bassist::bassist:


supertwin 004.JPG
supertwin 002.JPG
supertwin 003.JPG
supertwin 010.JPG
:bassist::bassist::bassist:
 
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#258
There is one of these for sale near me. I'm looking into it as I love my old Bassman, but 50 watts just isn't enough to keep up with the band.
What would be a fair price to offer for one of these in Canada (keeping in mind that the original case and speakers are of no use to me)?
 
#259
Eric_Allard said:
There is one of these for sale near me. I'm looking into it as I love my old Bassman, but 50 watts just isn't enough to keep up with the band.
What would be a fair price to offer for one of these in Canada (keeping in mind that the original case and speakers are of no use to me)?
Click to expand...

Well, I can attempt an answer, although the currency and wage levels are different. I actually paid around $1000 for a Super Twin combo. On top of that I also bought a head shell for it, and had a full service with retubing etc done. Although this all added up quite a bit, it was still much cheaper than buying another similar vintage tube head (especially at almost 200 watts!).

For me personally the ST has ended my search for the perfect amp (admittetly along with my 1964 Ampeg B-15N). I'm currently selling off a Sunn 200S and a Music Man HD One Thirty. In my opinion, the ST is worth way more than what they sell for, and so as long as it sets you back less than a comparable vintage tube amp, you'd be getting a great deal.

Still, this is only my humble opinion, and not everyone has the same taste in amps. :)
 

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