lilrock
Eric is right one amp is 15k the other is 46k you have a combined impedance of 11kohm that the preamp will see, forget about tube preamps, unless they are less than 1kohm output or less and very important maintain that <1kohm from 20hz to 20khz.
I would play it safe and get a solid state pre they are usually around 100ohm or less, they will have no problem with this 11kohm loading.
If your hooked on tube, then get a Schitt Freya, at least with this you'll have the option of tube, solid state or even passive.
Cheers George
Eric is right one amp is 15k the other is 46k you have a combined impedance of 11kohm that the preamp will see, forget about tube preamps, unless they are less than 1kohm output or less and very important maintain that <1kohm from 20hz to 20khz.
I would play it safe and get a solid state pre they are usually around 100ohm or less, they will have no problem with this 11kohm loading.
If your hooked on tube, then get a Schitt Freya, at least with this you'll have the option of tube, solid state or even passive.
Cheers George