The EP800 has lower bass extension than the EP600 because the EP800 has two drivers and therefore double (or 113.4 sq in) more driver surface area. This would be equivalent to a single 17" driver.

LFR1100 Actives,QS10HPx2,QS8x2,EP800,M3x4,M3x2 (Wood),M5HPx2 (Wood),AxiomAir,ADA1500-8,ADA1500-7