Luxman 590AX II Break-In

The m900u (and I am sure the M10X) has way more current than the 509x. I had the same observation when I heard those 2 with Harbeth (I was looking to buy KEF Reference 1). Dealer told me it is the power supply in the m900u that is the making that huge difference. I would look at buying a used m900u at $9K or less over the M10X. Your Reference 1 will sing with the m900u at a much lower cost and likely sound the same with the Reference 1.

I was discussing the Michi and Luxman M10X with someone who owned 2 Michi’s and the new Luxman integrated. His observations mirrored yours, I crossed the Michi off my list for my KEF Blade 2 Meta. I am now down to KRELL XD (3 models) and CODA #16 for the KEF. I dropped the Luxman M10X because it may not have enough current compared to the KRELL and CODA. I know it is not better sounding than the 2 under consideration. Just slight variances in sound.

@jeffreyw

Are you buying the more powerful amp and if so, what will you do for a preamp?

Glad you’ve now heard sufficient bass through those KEF’s. May you be able to hear that bass at home. :)

OP,

So it sounds like problem identified. What did you decide to do?

I wish I had found this page before at ASR. Through most of the musical bass range these speakers remain under 3 Ohms. Remarkably low impedance for a broad range, while the speakers I use only touch 4 Ohms. Great that a bigger amplifier solves the problem but man, I’d switch speakers first.  I think while the speakers can sound good with a big amp, it would have to be a remarkable speaker to make me accept these kind of demands.

PS - I had seen the specs at KEF, and if ASR is correct (and it makes sense it is) the KEF specs are absolute bs.

Also, the KEF specs looked normal-ish. A lot of 2 way speakers go down to 3 Ohms but only for a little bit, so I didnt question them further. These speakers are just way worse than my experience or the specifications suggest.  They are practically 2 Ohm speakers.

Now I know why a 509/590 wouldn’t work. Buddy, have you heard Fritz?? 😂