Denon DA 307 and DA 309


Hi, anyone know the effective mass of these tonearms?

Cheers
128x128best-groove
Hmmm, something is not right

Thank you @cleeds you are correct, my bad, I was mistakenly naming VTA to SRA

DA-401 is much better tonearm BTW
The Denon DP-80 that I bought recently is with DA-401, but I did not know that the headshell for DA-401 is special and there is no other replacement. I wonder why Denon made such decision. At least they should have sold enough headshells for DA-401 so that users could swap cartridges easily. Had I known this limitation, I would have gone for DP-80 with 307 or 309 arms, or even 305, 302, ...
However, DA-401 looks pretty good and it sounds quite good with DL303 and HA-1000.
@ihcho When DA-401 was released it wasn't a problem to buy additional headshell for this model. I have 3 original headshells for this tonearm to swap cartridges. The shell is super lightweight and this is why it's not a regular headshell. Now search for the headshell and buy it! 
It’s been just a couple of days sinceI got the turntable and have had no luck to find a headshell for DA-401 yet. ;-)
Let me know, just in case, if you think keeping three headshells for this tonearm is too much for you. I have DL-103R and Ortofon MC20 super but it looks like this tonearm may not be able to work well with them. Will see.
thx