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[jarrodthebobo]

Hey guys Ah was just wondering how each of these mods sound in comparison to the stock ADA mp-1. Ah can't seem to find any demos of these mods, and only very brief descriptions on what they sound like. Was wondering if anyone who's done these mods would be willing to give me a glimpse unto what these mods do to the sound?

Ah'm very interested in performing the cathode follower mod aswell as the mark II as ah'm always chasing that cranked plexi/jcm800 tone and am not always 100% satisfied with the stock ADA mp-1 tone (Although it is pretty close).

Ah'd love a demo, or just an in depth description of these mods! Thankyou!

-Jarrod

[AxeHarmony]

the mod1 is browner grittier than the mod4 mk11 where the mod4 mk11 is a more modern higher gain saturated gain so YES you need to have both to cover all basis

and then make a 3.666 (but you need to switch patches for a good scooped rhythm tone and a good lead tone (secret - the 3,666 can make a nice lead tone, just dial it in from scratch, don't scoop tone...)

then get a 3TM

Done !     

[trader144]

If I wanted to play and have od1 and od2 set around 2 to 3 for slightly gritty,  which is noticeable light distortion but not quite blues light, what mod would you recommend?

My mp-1 is stock and this level of distortion seems to be the worst sounding area from my mp-1.

Maybe I need to adjust or swap my trimpots. Tubes are new.

David

[rnolan]

Hey David
First thing I'd do is get the GMaj mixed in in parallel, not chain through it, Try taking it out so MP1 > Amp > cabs and compare, the difference is quite distinct/noticeable/better.
What tubes are you using ? For the sounds I think you are chasing I'd go with some Mullard short plates.
Mod I'd recommend is buy MP2 unless you want 3TM shredder. I had MP1 initially, now MP2, recently got to use my original MP1 for a bit and wanted more gain (i.e. understood why 3TM). IMHO MP2 is a much better/improved unit than stock MP1.
Cheers R

[trader144]

Rnolan
Great advice on the mullards!
I am using a pair of matched Ruby HG's.
I am stuck with mono on stage.

From reading, it sounds like a mullard I61 and I63 are the way to go and try first.
I need a warm clean sound, a great low distortion sound, and 5150 for solos.

Any more free advice on the mullards?

David

[rnolan]

Got to go stereo on stage if you can  . I've heard good things about Rubys' they test them well (they don't make them, often they're JJs). As all tubes, they have their strengths and weaknesses. If you want a low noise, warm, full balanced, 3D sound, I'd go the Mullards.

[RobbHell]

The whole thing with those Jcm's a lot used Clipping Diodes. A stock.refurbished Mp-1 can.do that with out a mod.  Not really a fan of the Marshallish mods here because honestly a stock Ada can sound close if not better. Look in your original owners manual for patch settings.

[robertkoa]

The other thing you should  try is the  JJ 83s  .

I have a 1.38 stock MP1  that already had noise mods and they did a good job

My MP1  is very clear  and  does clean Fender type tones on the clean TUBE channel  and above  6.0 or so
 turns into a  light Crunch or a little beyond  up high.

The Distortion Tube channel has clear non fizzy Gain  up to EJ/ Gillmour and beyond and  overlaps the
upper levels of the clean tube channel.

My pickups are far from the strings but I just think this  MP1  is cleaner than most  because people say the Tube Cleans aren't very clean  on  MP 1  but  this one is.

I may even try a JJ 803s  for even more overdrive clarity  but it sounds good now  and has a lot of  gain.

So I  would try  the  JJs , they always work well in  MP1  and are a good start.

[rnolan]

Any more free advice on the mullards?
David

Hey David, I'm using the New Sensor Mullard reissue long plates in both my MP2s (http://www.dougstubes.com/mullard-12ax7.html) and love them.
Another member tried the newer short plates (http://www.dougstubes.com/preamp-tubes/mullard-cv4004-12ax7.html) in his MP1 and loved them.
They are a really nice tube, extremely responsive to the slightest finger pressure/movement of my fretting hand (like nothing else I've tried).

I tried JJs (Boogie STRs) in the MP2, they were nice but broke up a bit on the bottom E, and they are more "boxy" than the Mullards.  I also used the JJs in my MP1 when I had it, they are good tubes but the Mullards are better IMHO.  Try a pair and let us know what you think.
Cheers Richard

[robertkoa]

Mullard longplates VS Mullard Longplates.

David, nice to know  are the Mullard Reissue Longplates fatter/warmer than the shortplates, the touch
response you mention is impressive, should be great for singing vibrato Tones.

Which do you think are clearer gain ?

[rnolan]

Well hopefully David will try the short plates and let us know.
I can vouch for the long plates as per previous post(s), next tube change I'll try the short plates and to some extent be able to inform this discussion better.  I'm using them in MP2.  There are some other posts if you search where a member went with the short plates in his MP1 and was very impressed.  IIRC he said they are smooth and warm. I'm hoping they both have the enhanced touch response I'm finding with the long plates, like no other tube I've used BTW.  The LP also have very clear gain (and plenty of it ).
Cheers Richard

[trader144]

Well I haven't tried the mullards yet....its such a $ risk.


So....just dreaming about the YJM100 head, it has 4 EC833's in the preamp....got me thinking....has anyone ever chained 2 MP1s together?
I might just try it.

Makes me think of the movie line "what ever you do.....don't cross the beams"

[rnolan]

Hey Jarrod, interesting idea, you'd need to be careful of the gain structure (BTW the Mullards are great  very low $ risk, I'd be very surprised if you don't like them alot).
So your idea would be easiest with early MP1s that have the line/instmt level switch and also the line level back input. Then you could go MP1 A line level out to MP1(2) Line (on the back) input OR MP1 A instmt level out to MP1(2) input OR put MP1(2) in MP1 loop (instmt or line level, adjust loop level knob) and have a 4TM party, in the loop makes it switchable so probably the way to go ??
Cheers R

[MarshallJMP]

.
So....just dreaming about the YJM100 head, it has 4 EC833's in the preamp....got me thinking....has anyone ever chained 2 MP1s together?
I might just try it.

Actually only one tube is used for the gain section,it has 2 channels (in parallel) so each channel has a half tube,then another half tube for extra gain,then a half tube for the tonestack (gain = 1x),1 tube for effects and one tube for the phase shifter.
So an MP-1 will have more preamp gain then YJM100 head.
I think chaining 2 mp-1's will give alot of noise.

[trader144]

Thank you for the insight, always appreciated.
Since the YJM is a 1959 plexi does anyone have any tube suggestions for the MP-1 that would come close to the YJM100 sound? Mullard short plates?

I cannot find specifically which preamp tubes are in it.

Sorry for hijacking this thread.