MULTIPLE ARM TURNTABLE

While using one phono preamp with multiple inputs is great (and is what I do at present) others swear by optimizing the phono preamp to the needs of the cartridge driving it -- so for your mono arm you can use a dedicated mono phono stage such as this http://www.thoeress.com/en/phono-enhancer/

I have two arms and am just adjusting my setup with the use of a step up stage which I have specified to have two inputs and the ability to switch between them, the phono stage I am moving to is a straight through single input design with 40dB of gain only so needs a step up

thanks

Manley Steelhead 

Gain - 50, 55, 60, 65 db

Input - MC1, MC2, MM

Loading - Multiple for each MC & MM

All from the front panel and "on the 
Fly"

Line input is selectable from front panel and mute.

Can eliminate line stage and pair of ICs - Has the B**Ls to drive amps directly. Built in volume control.

In addition to the Manley, the Aesthetix Rhea and the Audio Research Ref Phono 3 have 3 and two phono inputs respectively.

There are also some phno preamps with MM and MC phono inputs.

I own the Manley v2.0 and like it a lot.  I use it to drive a pair of Beveridge 2SW speakers via the built-in direct-drive Beveridge amplifiers.  You'll need no separate linestage, unless you want multiple high level inputs.  The Steelhead only has one high level input.

If you have a big budget, and if you are OK with solid state, you might consider the DSA phono2.  It has three totally discrete phono sections on one chassis.  Offers a choice of fully balanced or SE inputs and outputs. (Otherwise, only Atma-sphere offers balanced phono inputs, so far as I know.) You can set gain, load, capacitance, etc, independently for each one of the three sections.  It's built like a tank, would cost 3X as much if it fell into greedy hands of a marketer.  Purely for versatility and flexibility, there's nothing better that I know about, if you like SS.