The Audio Research i50 is a fantastic integrated. They have a DAC and Phono stage card upgrade as well. You can find them on HiFiShark for under 4K. That's a LOT of amp for not much money. I think they sound fantastic- typical ARC sound- tube warmth with analytical precision,
Integrated Amps
I'm debating whether to upgrade my Marantz integrated with a better performing and higher powered integrated or simply add a separate amp and use the Marantz as a pre-amp. I've looked at stepping up to the Marantz model 30 or 40n, PS Audio Stellar Strata, Music Fidelity M5si/M6si. But then the Heaven 11 Billie caught my eye.
Has anyone had any experience with the Heaven 11 Billie integrated amp? It's a hybrid class D amp w/ a tubed pre-amp. The reviews I've watched seem to give the unit high marks for sound quality, presentation, sound stage, and because of the tubed pre-amp, an analog warmth to the otherwise "cold" sound of a class D amp.
https://heaven11audio.com/billie2-amp-features-specs/?v=7516fd43adaa