Morch DP-8 arm on a Helix Two turntable

The problem cleverly addressed by the DP-8 is that frequencies below around 150 Hz are recorded in mono. It is simply not physically possible to separate these signals into 45° left and 45° right and maintain the correct amplitude at all dynamic levels. In effect this means that the bass is only cut laterally (horisontally).

By placing the lateral f-res as low as possible the frequency and phase response of the bass becomes more linear (= a good thing).

Here is the lateral f-res of my DP8/Blue Precision armtube/Ortofon Royal N.

https://vintagehifi.dk/forum/download/file.php?id=25271&mode=view

Here is the vertical f-res plot of the same

https://vintagehifi.dk/forum/download/file.php?id=25272&mode=view

How does it sound? in a word "excellent". Is it an improvement on the DP 6? Yes.

@his047 - can't access the links.

How does one post pictures if they are not available online? 

Because this thread was brought to the fore, I see now that in March, 2021, Mijostyn likened the Dynavector tonearms to a Transcriptors Vestigial tonearm. Heaven forebid!  I have to guess that Mijo never used a Dynavector.  Very different. I am not insulted; just wanted to set the record straight. (I once also did own a Vestigial, mounted on a Transcriptors Reference TT.)