Hopefully you have a pair of 804S, not N!

I used a 556 and 557 with Celestion SL700, not really easy to drive..
But between the two amplifier i prefer the 556, more airy, more detail.

Considering the small woofer size of 804s, the G57 is useless, for me.
Look for a G56 or G55 for the different possibility (bridging/bi-amping).




HiFi/HC lover
Electronics : Meridian G68ADV, Meridian 557, Meridian 556, YBA WD202 DAC, Musical Fidelity V-link
Speakers : Celestion System 6000, Celestion SL700 x4
Haute Savoie (74) France