Welcome. Enjoy the ride! I have replied to your PM.

What equipment makes up the rest of your system, into which you plan to slot the 557?

Duncan

Regards,
(Another) Duncan
Main: DSP6k, HD621, Oppo93, PS5, HP 800 G5 Mini, Hitachi 58HK6100U
Kitchen: M80+Echo Show 8"    Office: Echo V1
Bedroom: F80+Echo DotV3     Boxed: MS200 x2, DSP5K x 4