If you are looking for a little warmth and lots of current to drive your speakers with aplomb, from what I have read — Parasound and Plinius would be good choices. I have heard Belles Aria and now have the Aria Signature. They are both fine integrated amps — but as mentioned by mesch above, there is no published data on what it delivers into 4 ohms. You want something that doubles the wattage from 8 to 4 ohms ideally.
Integrated amp recommendation
I recently bought a used pair of Swiss-made Piega p4L MKII floor-standing speakers. I am looking for a two-channel integrated amp to pair with them. Budget: $1,000.
Among the stated speaker specs: applied power rating 20-200 watts, sensitivity 89 db, 4 ohms impedance and frequency response 38 Hz-50 kHz. To me, the speakers’ sound can be described as natural, detailed and transparent, not aggressive and maybe slightly lacking in bass. The room is 12 x 20, carpeted but relatively bare. I listen primarily to classic rock, classic jazz and classical. I use a Bluesound Node 2i music streamer and CDs. Bluetooth would be nice but not essential.
Thank you for any assistance.