Audio Hungaray Qualiton A50i vs LTA Z40+ Integrated

Minimum impedance for those Focals is 2.8 ohms, will be a very tough load if the attending phase angle is steep and if this minimum is in the bass frequency range (which it most often is). The two amps you are weighing have power ratings at 4 ohms that could be an issue IMO. You might want to consider a hybrid integrated (Copland makes a good one) with a solid 4 ohm rating OR ditch the Focals for the  new Mofi Sourcepoint 10s, that way you could be sure the amps you're weighing are gonna flourish (if your room isn't big at least).

I too owned and loved the Qualiton a50i. I replaced my Luxman 590AXII with the Qualiton and couldn't be happier. This is one amp I will gladly buy again for my second system when the funds are available. As someone here mentioned, it is powerful, musical, and holographic. IMO, it really does a great job of creating a lush, full, holographic, airy sound without getting too tubey or syrupy. Great execution of pure class A with classic tube sound!

The a50i drove all the following speakers in my listening room quite well -- Harbeth SHL5+, Fritz Carrera BE, and Joseph Audio Perspective2. Although, it did struggle just a little bit with the Joseph Audio with respect to reproducing the lower frequencies, but the JA is not a particularly efficient speaker to begin with. 

I have not heard the LTA, but from what I read it is more on the neutral side compared to other tube amps. Best to audition both if you can, but in either case the AH Qualiton a50i is a fantastic amp that will make you very happy!

@edwinf - Hi! I'm so sorry for the delay in my reply. Once I got home I was crushed with work. 

I, for the life of me, can't seem to figure out how to send you a private message. 

I'll try to diplomatically communicate what I'd wanted to share. 

As noted, I have a 100 Watt Qualiton tube amp. It's worked great and the sound is fantastic. Previously, I did have an older model preamp from them which had to be replaced. Qualiton was super helpful and committed to helping me. Can't give them enough credit. They are great!!!! 

That said, there is no USA-based repair center, so any repair/maintenance is a little more problematic than ideally desired. It's a minor side point, but something worth considering. 

The LTA team is based in the USA and would be more available for support, etc. 

In the end, you can't go wrong with either brand. But the repair side of things is something to think about... 

@edwinf - Let us know what you've landed on. Want to hear what direction you've taken and your impressions of new speakers and amp! 

And, again, sorry for delay. Things got beyond hectic once I got back to work.