So, say a kl-503hd. What kind of pass through wattage could you put through the box and be safe. I say pass through, meaning with the amplifier off.
RM specs say the max pass through is 50W.
http://www.88radio.com/index.php?route=product/product&product_id=85
I'd love to get one of these if they ever come back in stock. They'd be a great match to your typical 40W export.