Turntables That Can Accommodate Longer Tonearms

It looked better before I squeezed the 3rd arm on. I gained the functionality, but ....

wanting fixed cartridge on the long arm made changing headshells on the rear arm more important, thus the 3rd arm for Mono to go.

That looks good, Elliott, thanks for sharing.

I wanted a long arm, then I learned here how playing mono LP’s with a true mono cartridge sounds better (definitely does, degree of improvement varies from a little to definitely a lot).

so, I found a JVC CL-P2 Plinth with 2 removable arm-boards, I fit a 12.5" stereo arm, a 9" mono arm, pre-aligned, instantly switch during a listening session; then I found a very compact arm and squeezed a 3rd arm on that plinth, MC Stereo; MM Stereo; MM Mono, they just fit under the big dust-cover.

You need to consider how to switch inputs into your preamp; I found a SUT with 3 front selectable inputs, 4 optional MC loads/x-factors, and importantly MM Pass. Fidelity Research FRT-4. 3 in, rotate switch, one SUT output to preamp MM Phono.

3 arm TT is shown in my system photos here:

https://systems.audiogon.com/systems/9511

JVC DD: TT 61, 71. 81 (mine) all fit that Plinth. The plinth is a 7 layer composite with real wood veneer.

Someone steals it, I do it again without considering anything else.

Thanks for your reply,  I currently have a standard SH-15B2 plinth with a custom-made armboard for the 270mm distance, and it works great...but the overall fit under the dustcover is very tight.  I might have to settle for using a non-standard dustcover with this combination.

For longer tonearm you need bigger plinth, look here
What plinth do you have for your SP-25? Change the plinth, not turntable. You can completely remove the dustcover. This is SP-25 with "12inch Jelco for example.