Crown XLS 2500 instead of Yamaha M80?

[David Ketley]

My old Yamaha M80 runs my JBL 1400s but its old and unreliable. My M60 went up in smoke recently.
I was thinking of trying a Crown XLS 2500 on the JBL 1400s they cross at 160hz and 800hz.

I find that the JBL 1400s take a bit of driving only (89 db efficient) the M80 is 250W 8 ohm. Trying to replace it with a modern amp with the same power is just not a cost option hence my need for opinions on the Crown Amplifiers.

I have been informed that this amplifier summs the output at low frequency settings can anyone confirm?
If so that would mean buying two and running in mono mode!