Electronic Craftsmen may be able to make one that fits but mounting it would be a challenge. The transformer is mounted on the front panel and it has some sort of floating vibration absorption. I cringe at the thought of having to do that surgery.

I have no idea how Onkyo managed to hit that price point with my receiver. Their unit profit must be paltry. Every channel has a discrete amp module. Heat sinking is well done and they put a lot of thought into that chassis. The transformer is a wee beast.

Yes, it's THX-certified but I don't know what that means. Where can I find the certification tests?

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated