Reccomend a good preamp for me.

Do your homework before making recommendations.
There’s some here (with all good intentions) that have no idea the preamp/s they are recommending can possibly drive 10mts!!! of interconnect that the OP has, to his JC1 monoblocks, without any limitations.

Cheers George

Nat Audio Magnetic

The PS Audio BHK preamp is a fine unit with many inputs and flexibility of sound via the tubes.

The Coda 07X is the best preamp I have discovered thus far in terms of inputs, outputs and gain level settings per input. it doesn’t take up much space and generates minimal heat. 
The Schiit Freya+ is also ridiculously good and fun to operate. As far as bang for the buck, it’s tough to beat. Tubes, no tubes balanced, unbalanced, it’s got ya covered. 5 inputs and 3 outputs, quite nice indeed.

The best I ever heared: Ear Yoshino 868 , and Daniel Hertz M6L, (have the last one). In my mind: Ear Yoshino 912.

If your budget can handle it, I highly recommend the McIntosh C49. Besides the excellent and upgradable DA1 digital module, it has two balanced inputs, two balanced outputs, and 3 pairs of RCA in’s and out’s. Two of the RCA out’s are variable and one is fixed. It has phono inputs for MM and MC and they have user adjustable parameters specific to the cartridge type to get the best possible performance. All the inputs can be named for the device using them, and unused inputs can be deleted. The level of the incoming signal can also be set for each device so that all operate at the same level. The C49 also has bass, treble and balance controls with a bypass. All this is accessed by the two control knobs and a blue dot matrix screen. The icing on the cake is a wonderfully functional remote with a volume control that is actually useable, and allows access to all the functions.