Dog sport,
My vote is for the rm9,I've owned both but not at the same time.I'm just not a fan of the kt88 tube in general and much prefer the sweetness of the el34.
I also think the rm9 would be a better match to the 604's
Are the 604's stock or have they been upgraded by Great Plains audio along with the crossover networks.
Best of luck to you,
Kenny.
My vote is for the rm9,I've owned both but not at the same time.I'm just not a fan of the kt88 tube in general and much prefer the sweetness of the el34.
I also think the rm9 would be a better match to the 604's
Are the 604's stock or have they been upgraded by Great Plains audio along with the crossover networks.
Best of luck to you,
Kenny.