mono cartridge vs stereo

I think just about everything you need to know is in this thread, except which carts are true mono. That, and tip size are what make a hugh difference with vintage mono recordings. If you have such records in your collection and play them with a real mono cart, you'll hear the difference immediately. The entire presentation changes for the better.

Strapping the channels on a stereo cart is slightly different than using a mono switch. It might not matter, but you're cutting the cart impedance and inductance in half on most carts. That might depend on the physical orientation of the inductors (coils). A mono switch in a preamp usually comes after the phono EQ circuit.
Maybe having the phono stage channels hooked together halves the input impedance as well?

I checked out the specs of the Ortofon 2M Mono carts. They seem to be strapped 2M stereo carts just like it says in the mono overview. They're designed to play modern reissues methinks, and the SE model's shibata stylus would seem to confirm that.
2M Mono - 350mH, 700 ohm
2M Blue - 700mH, 1.3K ohm
2M Mono SE - 300mH, 600 ohm
2M Black - 630mH, 1.2K ohm

I think the hard part might be figuring out if your reissues are cut with a stereo or mono cutter.

Guys, I have a single tonearm available to me, and it is set up for stereo. I've got two questions:

1) When using the Y adaptor, do you need two Y adaptors, one to sum the L+R channels and one to redistribute them back to L+R outputs?

2) If you definitely don't have a mono cartridge, is it better to buy stereo re-issues of mono LP's?

Oh, and two other things. I'm assuming that with the Y adaptor approach, you're not just taking one channel and splitting it into two. That you are in fact blending the two channels and then distributing the blended signal to two RCA's.

I should also add that I have an outboard phono preamp. I assume that I should place the double Y adaptor device between my phono preamp and my linestage preamp?

There is no VS if you have many mono records you get a mono cartridge as well.

EBM - what you are saying is absolutist and contrary to what others have written. It seems you can use the Y adaptor approach, but you lose some fidelity. How much, I don't know. But most people don't have the capacity for two tonearms or the ability to quickly swap cartridges.