If you do not need it too loud I would recommend a Plinius SA 100 MKIII, it worked amazingly well with my 1.6s with excellent attention to bass detail and impact while keeping a beautiful midrange tone.
In comparison to the Innersound ESL amp the Plinius had a fuller sound where the Innersound had a more stark and direct presentation, but quite alive and airy, and of course the Innersound had a lot more power.
In comparison to the Innersound ESL amp the Plinius had a fuller sound where the Innersound had a more stark and direct presentation, but quite alive and airy, and of course the Innersound had a lot more power.