EAD lacks power compared to Sherbourn

I just picked up and EAD Powermaster 1000. It is replacing a sherbourn 5/1500a. The EAD has a cleaner and more musical sound but has a much lower output (volume). They are both rated 200 wpc. I'm wondering if I bought a problem. It sounds good but I'm running my prepro (Sunfire TGII) at a much higher level...is there a way do a simple check with a volt meter?
Thanks