Sorry you had to wait so long for my thoughts on 1200 Signature. More than two months of lockdown just killed my will and motivation to write.
1200 Mk3 is a very quiet phono stage. I have tried it with medium efficiency speakers with up to 95dB’s and it was hard to detect any meaningful noise. Even some solid state line stages and power amps were too noisy to detect Mk3 in the system. Nonetheless the Signature is even quieter and this is obvious from the moment you drop the needle on the record. It has even less low-level parasitic noises and consequently more low-level details. I would say new and fully balanced circuits is a major reason for this. I also like designer’s decision to implement a fixed 5Hz subsonic filter because it reduces annoying bass cone wobbling and perhaps this has also some other sonic benefits.
As is known 1200 Signature has fully balanced circuits with RCA and XLR output (XLR input is an option). Model 3000 also has RCA and XLR inputs and outputs but it’s balanced operation is achieved with transformers. Since my cj ART mono amps are single ended, I use only RCA inputs and outputs but will try balanced connection between phono and line stage in the future. Might be interesting...
1200 Mk3 was not exactly your first choice if razor-sharp transient response or super tight bass is your cup of tea. Instead it sounded extremely balanced, natural and (if I may say) musical, so I never felt the need for something else. As good as Mk3 is, the Signature is better in every imaginable way. It is considerably faster, has better control all over the frequency range, especially in the bass that is also stronger, deeper and more detailed. At first I had a feeling the upper bass/lower midrange has just a bit less body but in fact instruments have always enough of it but without a bit of Mk3’s extra fat.
Even though I never felt the Mk3’s reproduction of starting transients was in any way lacking, this part of reproduction seemed to lost some of its attractiveness when I switched from Karan solid state to conrad-johnson tube amps. With the Signature, I don’t miss anything. Transients are super fast, precise and articulate and it would be interesting to compare this detail to a high quality solid state unit. Maybe I’ll borrow a Pass XP-27 phono stage from a friend and we’ll “see”. Small dynamic gradations and dynamic contrasts are so much more real and persuasive with the Signature and same goes for beautiful timbres.
On first listen Signature seemed a bit less bright than the Mk3 but after a while I realized that although this is attractive most of the time, it’s still additional brightness, which is substituted with Signature’s superior and even more natural transparency and resolution, deeper soundstage, more space and air between instruments, better order in the orchestra and increased micro dynamic contrasts.
I could never describe the sound of Mk3 with a specific color or sonic character but Signature is even more invisible. Yes, Mk3 in comparison sounds a bit gentler, softer and less controlled but both are similarly colorless. Acoustic instruments with Signature just sound more like real instruments with less various additives.
I tried most of Signature’s new equalization features. The added 4th time constant is especially interesting but I need more time to be able to comment. Also, I don’t fully understand what exactly is 55, 45 and 42.5kHz 4th time constant frequency. Yamada-san doesn’t give an exact explanation, only a hint it’s connected with the characteristics of Neumann, Ortofon and Westrex cutting heads.
Note that my comments about Mk3 holds for the old version which was recently substituted with the Mk3 2020 version (
https://www.whatsbestforum.com/threads/zanden-1200-mk3-2020.31332/#post-673436 ). It was upgraded with all new eq options and subsonic filter plus some other changes in circuits which means it is actually a different animal.
Here’s a few pages from Zanden eq curve list.