Amps that don’t impersonate space heaters.

You can go class D or you can just reduce the amount of power.  Think of it this way.  Class A is 25% efficient.  So you pass is delivering 30w x2 so that means 90w x 2 is just burning off as hear.  

You need 1 very good watt to drive those speakers.  Even Class A, 1-5 watts may remain extremely inefficient but if you you were to take say a 5w PX25 amp, it will burn off 15w x 2 instead of 90w.  

Flea watt tube amps are the way to go.  I offer Art Audio which are lovely amps and are magical with Avantgarde, particularly the PX25 but it is a lot more than your current amp.  Any good manufacturer that produces a 45, 2A3 or PX25 will give you what you want I think

You need 1 very good watt to drive those speakers. Even Class A, 1-5 watts may remain extremely inefficient but if you you were to take say a 5w PX25 amp, it will burn off 15w x 2 instead of 90w.

Flea watt tube amps are the way to go.

A good class D amp can sound even better and despite being able to make considerably more power, actually draw less power at idle and at any power level the amps mentioned in this post can make. At the same time it can be stone cold to the touch even after running all day. Plus there’s a good chance a class D set of amps would take up less room and would certainly weigh less. Literally no downside.

I have had a couple of Class A amps that run as hot as a small space heater. My currrent Class A amp from Accuphase runs very cool in comparison and is not an issue at all. Curious if others have had a similar experience.

True class A burns full power all the time, and even if it's cool to the touch due to large heatsinks, it's still using that power and dissipating it as heat in the room.

I've read that the newest Mola Mola classD monos are even better than their well reviewed prior amps. GTT might do an in house audition like they do for the Tambaqui. Everyone keep in mind the power our systems draw wrt to climate change. My ML-532H sounds great and "only" draws 80w at idle, so it's quite cool. It's also very low noise and low distortion but at 300w it may be too much power for the OP.

Please write a follow up post telling us what you auditioned and went with. My next amp will probably be a GaN class-D mono to reduce the power draw.

Hegel 590/600 class AB, super cool, great sound