New Phono stage: PH 9.0 MM/MC with on-the-fly loading!

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twitch54

Re: New Phono stage: PH 9.0 MM/MC with on-the-fly loading!
« Reply #120 on: 25 Jan 2021, 04:57 pm »
I see here on the forum a S/N ratio of 76db (MC) mentioned, very nice. Why is it not published on the website under 'tech specifications' ?

nature boy

Re: New Phono stage: PH 9.0 MM/MC with on-the-fly loading!
« Reply #121 on: 25 Jan 2021, 06:23 pm »
I think that post may be incorrect. The specifications on the PH 9.0 can be found here:

www.modwright.com/products/ph-90

Dan has mentioned output with the new PH 9.0X notification increases output somewhat, but I'd stick with the published 64dB output as top output for MC. Unless Dan notes otherwise. BTW this phono preamp handles my low output Dynavector 20X2 cartridge (output voltage 0.3mV) extremely well.

HK

twitch54

Re: New Phono stage: PH 9.0 MM/MC with on-the-fly loading!
« Reply #122 on: 25 Jan 2021, 06:58 pm »
I think that post may be incorrect. The specifications on the PH 9.0 can be found here:

www.modwright.com/products/ph-90

Dan has mentioned output with the new PH 9.0X notification increases output somewhat, but I'd stick with the published 64dB output as top output for MC. Unless Dan notes otherwise. BTW this phono preamp handles my low output Dynavector 20X2 cartridge (output voltage 0.3mV) extremely well.

HK

you're confusing output (gain) with Signal-to-Noise ratio, two very different things. A S/N ratio of only 64 would be rather poor !

GregC

Re: New Phono stage: PH 9.0 MM/MC with on-the-fly loading!
« Reply #123 on: 2 Feb 2021, 09:47 pm »
I just wanted to comment on my impressions from the 90x upgrade.

When I received the PH 90 back from Dan (after the upgrade to a 90x), I hooked it up and listened.  Unfortunately my auditory memory was not good enough to remember exactly how it sounded before the upgrade.  I liked the tone and my initial impression was positive.  However, the soundstage seemed slightly compressed and the high end sparkle seemed dampened compared to what I remember before.  I inquired with Dan regarding break-in time for the new transformers.  Dan said they should continue to improve for the first 100 hours.

I dug through my things and I found a Hagerman reverse RIAA box that I had purchased a few years back.  I hooked it up to my CD player and ran in the PH 9.0 for a week (to avoid unnecessary wear on my expensive cartridge).

Last night I finally hooked up the PH 9.0 to hear it after the transformers had some burn in time.  I was not prepared for what to expect.
 
The bass was articulate, accurate, and prodigious without being out of balance.  The airy highs were back (and surpassed) what I remember from before the upgrade.  The balance from top to bottom is remarkable.  The soundstage is huge without sounding unnatural.  The space around performers blends in a natural way like a live event.  Imaging is reach out and touch you on well recorded albums.

As a reference, the MC input sounds excellent, but the phono stage really shines when I feed the MM input with my Tribute Audio custom wound MC step up transformer.

I am thrilled with the upgrade.  My only advice is to reserve judgment until after the transformers have a chance to burn in.

Nonnegativ

  • Jr. Member
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Re: New Phono stage: PH 9.0 MM/MC with on-the-fly loading!
« Reply #124 on: 14 Mar 2021, 03:34 pm »
My upgraded PH-9X arrived in Denmark a few weeks ago, and it has now had about 50 hours of use. I originally ordered the version with balanced out, but found that it sounded best single ended.

The upgrade is imo definitely worth the expense. It has transformed a great phonostage into a magnificent one. All it's original virtues are intact, but the insight into the music has expanded considerably due to it performing at a much higher level. I am now running balanced out with my favorite Amperex USN-CEP 7308's doing it's magic.

It is difficult to describe the update in audiophile terms, so let me try by giving score:

If the PH-9 has a score of 100 in it's original form, then the PH-9X would get a conservative 150 score in my book. That is quite a lot, as we are already up in the higher levels, where differences are small.

It is hard for me to believe it can get better than this after the transformers has had more playing time, but I will gladly accept it. 

All in all: If you upgrade, prepare yourself for quite a sonic revelation. I am extremely satisfied.

Best Wishes from Denmark

Carsten
« Last Edit: 25 Mar 2021, 08:01 am by Nonnegativ »