Luxman 590axii with KEF Reference 1

Yes without a doubt the Luxman 590 will give you amazing bass. For some reason, Luxman seriously under rates the power specs. I was driving my Sonus Faber Olympica 2 with Audio Research GSI75 and the sound the KT150s made was quite good. But once I switched to the 590axii, the bass was glorious - punchy, impactful and textured. The sound is less euphonic but comes damn close to tubes, with better dynamics, detail retrieval, and wide soundstage. 
Sonus Faber Olympica 2 are 88 db and 4 ohms. The Luxman has zero trouble driving them. The KEF Ref 1 are less sensitive but higher impedance. I’m sure you’ll like the performance. Good luck!

Ok thanks appreciate the reply. 

You may want to consider the KRELL K-300i integrated that I am using to drive KEF LS50's. It is very smooth (tube like) and very powerful. It will rock those KEF 1's. This KRELL has amazing bass on both my LS50's and Thiel CS3.7.

In the future, the LS50 will be replaced by a Yamaha NS5000 which has a huge bass driver. That should be a pretty incredible combo in the big room I have the KRELL in.

I also tried the CODA CSiB with both of the LS50 and CS3.7. It is also a great sound with a little less bass than the KRELL. The CODA has 3 versions and I had Version 1 with 150 | 300 at 8 and 4. The first 18 watts were in Class A. I think both of these would have more bass power than what I remember from the Luxman 509x and the m900u. Both are great integrated amps.

You should find previous threads on the 590.
It is a seriously technically under-rated amp, which would do about 100 WPC if it wasn't for the preconditioning requirement.