ADA Preamps > MB-1
MDRT vs. Noise Reduction Mod (Or both)
jlowe1116:
Hey ADA fans,
I purchased and fell in love with my MB-1 back in about 2008. I hadn't played much over the last 4 years or so but in the last 3 months I have heavily gotten back into playing and would like to do some recording again. The problem is, there is sooooo much noise coming through my amp when using my MB-1.
Now, I am at a point where I would like to spend some money and invest in my MB-1 but I would like a good place to start:
What should I look for when taking the lid off this thing in terms of some caps that would need to be replaced due to old age/usage?
Is the MDRT so highly recommended because it make a big difference in terms of tone (also anyone have any before and after clips)?
Does the MDRT do a good enough job by itself in removing buzz where I wouldn't need the noise reduction mod?
Should I just go ahead and do both?
Thank you all so much for your feedback and keep on rocking!
rnolan:
Hey jlowe1116 :wave: welcome to the depot, I see one of the guys set you up an account :thumb-up: .I bought 2 MB-1s from the US and sent them via MJMP for an overhaul. Both have MDRTs now (which solved my power problem being in Australia). I got him to do whatever he thought was necessary so check with him what's recommended.I've not heard an MB-1 without the MDRT so can't directly compare, Peter can probably comment about that. I know he's a big fan of the MDRT and also Burr Brown opp amp(s). Both of mine are quiet as a mouse. I have one in my studio rack and one in my live MP-2/MB-1 hybrid rack. Awesome bass preamps, best I've ever heard.The noise reduction mod is worth doing as well as the MDRT as the caps are old. Also worth changing the tubes, I put some Mullard long plates in mine.
Peter H. Boer:
Check this thread http://adadepot.com/index.php?topic=236.0
jlowe1116:
--- Quote from: rnolan on February 25, 2019, 10:57:15 PM ---Hey jlowe1116 :wave: welcome to the depot, I see one of the guys set you up an account :thumb-up: .I bought 2 MB-1s from the US and sent them via MJMP for an overhaul. Both have MDRTs now (which solved my power problem being in Australia). I got him to do whatever he thought was necessary so check with him what's recommended.I've not heard an MB-1 without the MDRT so can't directly compare, Peter can probably comment about that. I know he's a big fan of the MDRT and also Burr Brown opp amp(s). Both of mine are quiet as a mouse. I have one in my studio rack and one in my live MP-2/MB-1 hybrid rack. Awesome bass preamps, best I've ever heard.The noise reduction mod is worth doing as well as the MDRT as the caps are old. Also worth changing the tubes, I put some Mullard long plates in mine.
--- End quote ---
Thanks for the information. I remember clicking on this site (or maybe some older forums) and reading up about the MB-1 before I bought it about 10 years ago. I was planning on doing the Bill Brown op-amp upgrade after I did the MDRT and noise mod. Thank you for the insight and I look forward to being active on these forums.
vansinn:
IMHO, noise aren't a problem in the MB-1 unless the capacitors have dried out, and as such no longer filters correctly. Replace those as stated in the thread Peter referred above.
The Burr-Brown opamp replacement IMHO has more to do with tone than noise, but as tone is always important, might be a good idea doing that replacement while you're ordering components anyways ;)
I didn't install the MDRT, so can't directly talk about what it does, but to my knowledge it will improve tone, dynamics and likely distortion too, so, I would install it.
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