Quality of the LM 845 Premium pre-amp


Hi I am thinking about getting a pre amp for my LM845. I really like this amp but just how good is the pre amp?
Would love to hear from someone that have tried different pre amps with the lm845
martin-andersen
I like noise and distortion 😊
it has a dedicated pre amp in a and a switch on the front for external or internal pre amp. 
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I appreciate your advice but there are also funny considering that I have bought a 62kg tube amp that I love
Your not going to get the full capability of any other Pre-Amp you use.  Line Magnetic sadly has something in the design that interfere's with the use of other Pre-Amps functionability.  If you do more research you will find out the EXACT Technical reason why this is.  I just cant remember at the moment but its been well documented.