Did I just make my audio system too sensitive after adding a Herron VTPH-2A preamp?

I’ve added the Herron VTPH-2A preamp to my system and in comparisson to the my previous Tube Box DS phono stage it really exposes so much more of the instruments playing in each track. The clarity and dynamic responce is astounding, so revealing is the Heron that I actually hear much more imperfections. I’m not a golden ear, au contraire - I’m losing my hearing.
I’m questioning if audio tolerances have been affected so much that vinyl grooves, dust and static are more susceptible to be heard? Or is it something else that I’m missing downstream that ’just isn’t right’.

My system consists of the following components:

Upgraded Technics 1200 MKII Turntable,
Herron VTPH-2A Phono Preamp,
Sym Audio Moon Neo 350P Preamp,
Bryston 4B3 amplifier,
Bryston Model T Signature speakers

I have the $3500 Herron also for two months now.  Super phono pre.  I think it's showing you what "just isn't right" with your old $400 phono pre and revealing what's wrong upstream.  My surface and groove are still dead silent (Rega RP-10 and Apheta 2).  
I forgot to add the cartridge is an AT-ML150/OCC.
Time to figure where this noise is emanating from.
That last detail is telling. AT has their fans but I am not one. Way too hi-fi sounding with exaggerated detail for me. 

You just had a huge, major upgrade. I know. Upgraded to the same Herron last year and even from Audio Research PH3-SE it was a huge redefining experience. You can spend more money and get more features but pretty sure you cannot do any better. And I got Mikey Fremer on my side saying the Herron is as good as ANY Class A component. So relax and don't worry about the Herron.

That cartridge though, the exaggerated attacks it hypes out are no longer being glossed over but instead with the Herron are being amplified in all their AT infused glory. 

What I would suggest you try is first, Keith Herron sends along some loading resistors. Try them. Try them all. Only takes a minute. You may be surprised what a little loading can do for an over zealous MC. At the very least it will give you some new understanding of phono playback.

Next thing I would try, Synergistic Research PHT. These little PHT things have an amazing ability to tweak and tune your cartridge and arm. They come in different "flavors", Green Dream and Black Velvet being my favorites. They stick on easily, are totally removable, and come with a 30 day money back guarantee. They don't eliminate surface noise but they do make a profound and fascinating improvement in what you hear. They work everywhere I've tried them, which will come in handy because....

Last thing I would try is a better cartridge. Koetsu has a reputation for de-emphasizing surface noise. For years I was put off by the price, and not wanting to buy the "cheapest" Koetsu, the Black Goldline, which was about the most I could afford. Once I got it though, what was I thinking??! Totally worth every penny. And then some. Not quite the bargain the Herron is. How often can you buy the best in the world for three grand? Congratulations, you got a lot of stuff you will probably want to be upgrading but the Herron is a keeper for life!
I would talk with Keith as well. I have a handful of loading resistors I'd be happy to let you borrow, just let me know. ^ The VTPH-2A is a keeper for life! 

Gentlemen, as a point of information the AT-ML150/OCC is a moving magnet cartridge, and the 47K input impedance of the Herron’s moving magnet input is correct for it.

Also, I believe that the cartridge has not been manufactured for quite a few years. To the OP, is it possible that the Herron is simply bringing out the effects of stylus wear that was not evident with the Pro-Ject?

Finally, I see that the input capacitance of the Pro-Ject is selectable between 47, 147, 247, and 367 pf. While the input capacitance of the Herron’s moving magnet input is fixed at 100 pf. What setting were you using on the Pro-Ject? If you were using 247 or 367 pf chances are that the difference relative to 100 pf would be resulting in a significant difference in frequency response in the treble region. Although I’m pretty certain that the lower the input capacitance that is seen by that cartridge the better, assuming accurate response is the goal. (Like some other AT MMs I believe the ML150/OCC has a recommended load capacitance in the area of 100 to 200 pf, which represents the sum of the capacitances of the tonearm wiring, the phono cable, and the input capacitance of the phono stage, and in many setups it may not be possible to keep that total so low).

BTW, like the others who have responded I too am a very happy owner of a Herron phono stage, the VTPH-2 (non-A) in my case. I and a number of other members here use it with an Audio Technica AT-ART9 low output moving coil cartridge.

-- Al
Slight correction to my previous post:  "247 pf" should have been "267 pf."

-- Al 
The Herron is a wonderful phonostage and the end game in that component for me (and everything around it has been upgraded since I bought it). While it is very revealing of a great source, it will expose flaws if the source isn’t right (table/arm/cartridge/cable). That’s not specific to the Herron but true in general as you work your way up the audio component ladder to better gear.

I’m using mine with a Clearaudio Ovation table w/Universal arm and Dynavector XV-1s cartridge: it is dead quiet and sounds delicious.
I have a Herron VTPH2A it is a fantastic Phono Preamp. I am using it with a Morch DP6 arm and Allaerts MC1B cartridge.
I believe it would be worth while to upgrade your cartridge. If you can afford it the AT ART 9 cartridge gets great reviews and would improve your system. It's about $ 1K.
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Thanks for all your responces...keep them coming.I will try a different cartridge. The ART9 looks like a decent one. I'll be looking for any additional recommendations on cartridges under ~2K.
Soundsmith is moving their old lineup with deep discounts.  Judging by my MIMC Star, the price/performance ratio will be very difficult to meet or beat.  
I couple of years ago, I was in a similar place shopping for a cartridge for my Technics SP10mkII around ~$1k max (considering used or new). A friend with a highly modded 1200(TransFi Terminator arm, Mike New copper platter, Hynes power supply, etc.) used the ART9. Another friend had a Dynavector XX2 (mk1). We brought it over and spent a night comparing them. It was an interesting comparison and both carts showed their merits. Each owner had a slight preference for their own choice.
My take was that the ART9 was highly detailed, but not over-hyped, and excelled on classical music, especially massed strings. The Dyna was my preference with more natural rhythm, a more relaxed tonal balance and just more "you are there" particularly on acoustic rock, jazz and vocal music. Bottom end also had more jump with more exacting leading trailing edges to notes. It's taken me a while, but I recently bought a XX2mkII. If I hadn't compared them and just bought the ART9 I think I still would have been very happy with it. These had more in common than I expected and both are very impressive in there price range. FWIW, I recently saw a good deal with someone selling a new XX2 for a bargain price. Cheers,
OP are doing your own cartridge setup or your local dealer ? That should be IMO a big driver in your choice, even given the above august advice.  But in general re-read Almargs excellent post and the settings question he asked. Agree w others on a new cart needed, get it looked at under magnification 2

and to stoke my confirmation bias dopamine hit, I like the Lyra Delos at slightly under $2K

The Herron is on my must listen to list as well ! congrats on that 
@almarg You're correct, the AT-ML150 pF 100-200. I had it set to 100 pF on the Pro-Ject as well as the Herron.
I'm strongly leaning towards a new cartridge. I'm looking at the ART9. No doubt the Herron exposes system shortcomings, but will also reveal poor production and pressing qualities. This needs to be considered and possibly taken with a grain of salt.