I am a tube lover and live in the desert southwest, I feel your pain. (58 tubes/class A...... well maybe not that much pain).
A 5 blade ceiling fan would make you/wife feel 7-8 degrees cooler. Don't know if that is enough for you.
A McIntosh amp from the 80's/90's with autoformers might be an okay change for the few months.
Two amps I use, but are less power than you are looking for, are a Bedini 45/45 ss amp and a Red Wine Audio 30.2 battery powered chip amp. They both have a sound I like and run cool or even cold in the RWA case.
On the power you are looking for (150/4 ohm): I used to think I needed gobs of it with my Apogees and Maggies until I heard a 50 watt pure class A Accuphase driving them. Sounded better than my 500 wpc ss amp. There are lots of reasons why some lower powered amps would work but if you really like to crank it, maybe you do need the watts.
A 5 blade ceiling fan would make you/wife feel 7-8 degrees cooler. Don't know if that is enough for you.
A McIntosh amp from the 80's/90's with autoformers might be an okay change for the few months.
Two amps I use, but are less power than you are looking for, are a Bedini 45/45 ss amp and a Red Wine Audio 30.2 battery powered chip amp. They both have a sound I like and run cool or even cold in the RWA case.
On the power you are looking for (150/4 ohm): I used to think I needed gobs of it with my Apogees and Maggies until I heard a 50 watt pure class A Accuphase driving them. Sounded better than my 500 wpc ss amp. There are lots of reasons why some lower powered amps would work but if you really like to crank it, maybe you do need the watts.