MM Phono Stages With Greater Than 40 dB of Gain?


One of my favorite phono cartridges is the Ortofon MC 2000, I have it with the T2000 SUT. Even so the combined output is still low, and going into my Esoteric E-03 phono stage I have to add a lot of additional gain from the pre amp.

Since I no longer use the Esoteric for direct input of moving coil cartridges I thought I might see if there is a better choice for a MM style phono stage that offers greater gain.

I have looked a bit, but not seen anything jump out. Anyone have run across an excellent MM only phono stage with higher than 40dB of gain?

neonknight

I still have an MC20 in a drawer, which also has that insanely low 0.07mV output. I remember a long time ago, I enjoyed this cartridge when I had a combination of extremely high gain preamp > 20dB) and power amp gain (> 30dB) to make up for it downstream. Very different sound from modern Ortofon. I sometimes consider how I would handle that cartridge today.

First, you can upgrade your MM gain above 40dB, as you mention. The ARC Reference series phono stages (Ref 3) are pricey but get you a whopping 52 dB in low gain / MM mode on the balanced outputs (6dB less in SE). Many other tube phono stages offer 42 - 46dB, like various VACs (some built-in to preamps), Rogue Ares, Hagerman Cornet / Trumpet. The Herron VTPH-2 is a good one, especially if made with the 4x 12AX7, 1x AT7 configuration which gets up into 48dB MM (drops to 43dB with the 3x 12AT7, 2x AX7 configuration - note a unit’s RIAA curve will be factory tuned to one config or the other; you shouldn’t just swap tubes). I believe EAR 834P also has a very high MM gain.

Then I’ve also been considering - what about using a low ratio SUT in combination with a moderate gain MC stage? It sounds "wrong" but on paper there’s no reason it can’t work great. For example:
EAR MC-4’s 40 ohm tap (10x = 20dB gain) plus a Benz Lukasheck PP-1 62dB (all solid state gain) results in a whopping 82dB gain, should be very low noise, and 220 ohm net load. You can use RCA splitters and loading plus if you want to lower the load further. OR how about a nice low noise hybrid MC stage like Sonic Frontiers Phono 1 (came in 54dB and 64dB variants) or Manley Chinook (60 or 66dB) should also work well like this. Their lead stage is JFET so the loading is flexible. You definitely CAN’T stack two SUTs in series (because of loading and Ohm’s law) and you shouldn’t stack two MC gain stages (because of noise) but a SUT into a JFET MC stage is fine (kind of seems like an audiophile “life hack” here), as long as you set the input loading above 1K!

So - lots of options!

Manley Steelhead offers minimum 50db of gain on its single MM inputs, and that can be cranked up as high as 65db, not that you would need it. I too love the MC2000, and I use mine with a custom built outboard pre-preamp into the Manley MM inputs with gain to spare. (The Manley linestage adds no gain, so being able to access 50db via the MM phono inputs is critically important.) I assume the less expensive Chinook would also provide 50db of MM phono gain, but you should check. This is with my Beveridge system. On my Sound Lab system, I use the same outboard pre-preamp into a modified Silvaweld MM stage and thence into the linestage of Raul’s 3160 Phonolinepreamp, which adds at least 20db of gain. I do not own any SUT.

So far it seems to get that level of gain is going to be had with tube based phono stages. 

Are there any solid state alternatives?

@mulveling The MC2000 . .05 mV, so a bit lower. I have the T2000 which is listed as having 35 dB of gain. I think its somewhere around 1:50 ratio. 

When I did find a T2000 I had hoped that I had my gain issue put to bed. It's not qute that easy. 

So far it seems to get that level of gain is going to be had with tube based phono stages. 

Are there any solid state alternatives?

@mulveling The MC2000 . .05 mV, so a bit lower. I have the T2000 which is listed as having 35 dB of gain. I think its somewhere around 1:50 ratio. 

When I did find a T2000 I had hoped that I had my gain issue put to bed. It's not qute that easy. 

Yeah - I like to listen loud and 35dB from a SUT might not be enough for my liking with 0.05mV. That's still only 2.5mV hitting the MM stage, which is on the low side. 

Again, I think a 10x SUT is underrated here - that makes the 0.05mV into 0.5mV, which is in the range of a "normal" MC. Then you add a normal MC stage, being sure that it's "active" MC gain and not another SUT - loads of solid state MC stages would do well here. 

Dear @neonknight  :  " Are there any solid state alternatives? "

 

Yes it's. Essential 3180, please contact here rauliruegas@hotmail.com

 

Regards,

R.